# Maintained by Axel Boldt (boldt@math.ucsb.edu) 
# Maintained by Axel Boldt (boldt@math.ucsb.edu)
#
# This version of the Linux kernel configuration help texts
# corresponds to the kernel versions 2.0.x.
# + the Axis Commmunications ETRAX port specific config.
#
# International versions of this file available on the WWW:
#   - http://jf.gee.kyoto-u.ac.jp/JF/JF-ftp/euc/Configure.help.euc
# is a Japanese translation, maintained by Tetsuyasu YAMADA
# (tetsu@cauchy.nslab.ntt.jp).
#   - http://nevod.perm.su/service/linux/doc/kernel/Configure.help
# is a Russian translation, maintained by kaf@linux.nevod.perm.su.
#
# Information about what a kernel is, what it does, how to patch and
# compile it and much more is contained in the Kernel-HOWTO, available
# via FTP (user: anonymous) from sunsite.unc.edu in the directory
# /pub/Linux/docs/HOWTO.
#
# Format of this file: description<nl>variable<nl>helptext<nl><nl>.
# If the question being documented is of type "choice", we list
# only the first occurring config variable. The help texts
# must not contain empty lines. No variable should occur twice; if it
# does, only the first occurrence will be used by Configure. The lines
# in a help text should be indented two positions. Lines starting with
# `#' are ignored. To be nice to menuconfig, limit your lines to 70
# characters. Use emacs' kfill.el to edit this file or you lose.
#
# If you add a help text to this file, please try to be as gentle as
# possible. Don't use unexplained acronyms and generally write for the
# hypothetical user who has just bought a PC, removed Windows,
# installed Linux and is now recompiling the kernel for the first
# time. Tell them what to do if they're unsure. Technical information
# should go in a README in the Documentation directory. Mention all
# the relevant READMEs and HOWTOs in the help text.
#
# All this was shamelessly stolen from several different sources. Many
# thanks to all the contributors.  Feel free to use these help texts
# in your own kernel configuration tools. The texts are copyrighted
# (c) 1995,1996 by Axel Boldt and governed by the GNU Public License.

Prompt for development and/or incomplete code/drivers
CONFIG_EXPERIMENTAL
  Some of the various things that Linux supports (such as network
  drivers, filesystems, network protocols, etc.) can be in a state
  of development where the functionality, stability, or the level of
  testing is not yet high enough for general use.  This is usually
  known as the "alpha-test" phase amongst developers.  If a feature is
  currently in alpha-test, then the developers usually discourage
  uninformed widespread use of this feature by the general public to
  avoid "Why doesn't this work?" type mail messages.  However, active
  testing and use of these systems is welcomed.  Just be aware that it
  may not meet the normal level of reliability or it may fail to work
  in some special cases.  Detailed bug reports from people familiar
  with the kernel internals are usually welcomed by the developers.
  Unless you intend to help test and develop a feature or driver that
  falls into this category, or you have a situation that requires
  using these features you should probably say N here, which will
  cause this configure script to present you with fewer choices.  If
  you say Y here, you will be offered the choice of using features or
  drivers that are currently considered to be in the alpha-test phase.

ETRAX Memory configuration
ETRAX_DRAM_BASE
  Start of DRAM (in hex), normally 40000000

ETRAX Memory configuration
ETRAX_DRAM_SIZE
  Size of DRAM (decimal in MB) typically 2, 8 or 16:
	Axis 2490 (Bundy): 8 (but 2 can be mounted instead)
	Axis Dev. Board (Bundy): 8 (but 2 can be mounted instead)

LED configuration
CONFIG_ETRAX_PA_LEDS
  The Etrax network driver is responsible for flashing LED's when
  packets arrive and are sent. It uses macros defined in asm/io.h, 
  and those macros are defined after what YOU choose in this option.
  The actual bits used are configured separately.
  Some products put the leds on a memory-mapped latch instead. This
  is mapped at 0x90000000.

LED bit configuration
CONFIG_ETRAX_LED1G
  Bit to use for the first green LED. 
  Most Axis products use bit 2 here. The 2100 Lisa camera uses 3.
  Products with LED's at 0x90000000 uses bit 16.

LED bit configuration
CONFIG_ETRAX_LED1R
  Bit to use for the first red LED.
  Most Axis products use bit 3 here. The 2100 Lisa camera uses 4.
  Products with LED's at 0x90000000 uses bit 17.
  For products with only one controllable LED, (eg. 5400, 5600)
  set this to same as CONFIG_ETRAX_LED1G (normally 2).

LED bit configuration
CONFIG_ETRAX_LED2G
  Bit to use for the second green LED. The "Active" LED.
  Most Axis products use bit 4 here. The 2100 Lisa camera uses 5.
  Products with LED's at 0x90000000 uses bit 18.
  For products with only one controllable LED, (eg. 5400, 5600)
  set this to same as CONFIG_ETRAX_LED1G (normally 2).

LED bit configuration
CONFIG_ETRAX_LED2R
  Bit to use for the second red LED. 
  Most Axis products use bit 5 here. The 2100 Lisa camera uses 6.
  Products with LED's at 0x90000000 uses bit 19.
  For products with only one controllable LED, (eg. 5400, 5600)
  set this to same as CONFIG_ETRAX_LED1G (normally 2).

LED bit configuration
CONFIG_ETRAX_LED3G
  Bit to use for the third green LED. The "Drive" LED.
  Most Axis products doesn't have this LED. 
  Products with LED's at 0x90000000 uses bit 20.
  For products with only one or two controllable LEDs,
  set this to same as CONFIG_ETRAX_LED1G (normally 2).

LED bit configuration
CONFIG_ETRAX_LED3R
  Bit to use for the third red LED. 
  Most Axis products doesn't have this LED.	
  Products with LED's at 0x90000000 uses bit 21.
  For products with only one ortwo controllable LEDs, 
  set this to same as CONFIG_ETRAX_LED1G (normally 2).

Button configuration
CONFIG_ETRAX_PA_BUTTON_BITMASK
  This is a bitmask with information about what bits on PA that
  are used for buttons.
  Most products has a so called TEST button on PA1, if that's true
  use 02 here.
  Use 00 if there are no buttons on PA.
  If the bitmask is <> 00 a button driver will be included in the gpio
  driver. Etrax general I/O support must be enabled.

PA changeable direction bits
CONFIG_PA_CHANGEABLE_DIR
  This is a bitmask with information of what bits in PA that a user
  can change direction on using ioctl's.
  Bit set = changeable.
  You probably want 00 here.

PA changeable data bits
CONFIG_PA_CHANGEABLE_BITS
  This is a bitmask with information of what bits in PA that a user
  can change change the value on using ioctl's.
  Bit set = changeable.
  You probably want 00 here.

PA changeable direction bits
CONFIG_PB_CHANGEABLE_DIR
  This is a bitmask with information of what bits in PB that a user
  can change direction on using ioctl's.
  Bit set = changeable.
  You probably want 00 here.

CONFIG_PB_CHANGEABLE_BITS
  This is a bitmask with information of what bits in PB that a user
  can change the value on using ioctl's.
  Bit set = changeable.
  You probably want 00 here.

Kernel debugger (kgdb)
CONFIG_KGDB
  The CRIS version of gdb can be used to remotely debug a running eLinux
  kernel through the serial debug port. Provided you have gdb-cris
  installed: in the elinux/ directory, run gdb-cris vmlinux, then type
  (gdb) set remotebaud 115200           <- kgdb uses 115200 as default
  (gdb) target remote /dev/ttyS0        <- maybe you use another port
  This should connect you to your booted kernel (or boot it now if you
  didn't before). The kernel halts when it boots, waiting for kgdb if
  this option is turned on!

Etrax bus waitstates
DEF_R_WAITSTATES
  Waitstates for SRAM, Flash and peripherials (not DRAM). 95a6 is a 
  good choice for most Axis products... 
	Axis 7000 InfoSender should have: 010000ff

Etrax bus configuration
DEF_R_BUS_CONFIG
  Assorted bits controlling write mode, DMA burst length etc. 104 is a
  good choice for most Axis products...
	Axis 7000 InfoSender should have: 000000fc

Etrax DRAM configuration
DEF_R_DRAM_CONFIG
  The R_DRAM_CONFIG register specifies everything on how the DRAM chips
  in the system are connected to the Etrax CPU. This is different 
  depending on the manufacturer, chip type and number of chips.
  So this value often needs to be different for each Axis
  product. Values that may work are (please add to this list):
  	Axis 2400 (Olga) production version with 16 MB DRAM: 1a800060
  	Axis 2100 (Lisa) with 8 MB DRAM:                     1a000040
  	Axis 2490 (Bundy) with 8 MB DRAM:                    1a200040
  	Axis Dev. Board (Bundy) with 8 MB DRAM:              1a200040
  	Etrax100 testcard with 2*16MB DRAM modules:          1b988080
  	Axis 5400 printerserver with 8 MB DRAM:              1a200040
  	Axis 7000 InfoSender with 16 MB DRAM:                12b96078

Etrax DRAM timing
DEF_R_DRAM_TIMING
  Different DRAM chips have different speeds. Current Axis products use
  50ns DRAM chips which can use the timing: 5611.
	Axis Etrax-100 testboard uses slower dram: 6557
	Axis 7000 InfoSender should have: 00007635

Etrax General port A direction
DEF_R_PORT_PA_DIR
  Configures the direction of general port A bits. 1 is out, 0 is in.
  This is often totally different depending on the product used. There
  are some guidelines though - if you know that only LED's are connected
  to port PA, then they are usually connected to bits 2-4 and you can
  therefore use 1c. On other boards which don't have the LED's
  at the general ports, these bits are used for all kinds of stuff.
  If you don't know what to use, it is always safe to put all as inputs,
  although floating inputs isn't good. 
  On the testboards, all of port PA and PB can be set as outputs since
  they have LED's. 
	Axis 2400 (Olga) should have: 0d
	Axis 2100 (Lisa) should have: f9
	Axis 7000 InfoSender should have: fd
	Axis 5600 should have: fd (1 TEST in, 2 LED out - rest intied (out))
	Axis 2490 should have: 1d (0 serinit,TEST,LED,com2_enb, dtr,ri,dsr,cd)
	Axis Dev. Board should have: 1d (0 serinit,TEST,LED,com2_enb, dtr,ri,dsr,cd)

Etrax General port A data
DEF_R_PORT_PA_DATA
  Configures the initial data for the general port A bits. Most products
  should use 00 here.
	Axis 2490 (Bundy) should have:       f0 
	Axis Dev. Board (Bundy) should have: f0 

Etrax General port B config
DEF_R_PORT_PB_CONFIG
  Configures the type of the general port B bits. 1 is chip select,
  0 is port. Most products should use 00 here.
	Axis 7000 InfoSender should have: c0
	Axis 2490 (Bundy) should have: 00 
	Axis Dev. Board (Bundy) should have: 00 

Etrax General port B direction
DEF_R_PORT_PB_DIR
  Configures the direction of general port B bits. 1 is out, 0 is in.
  This is often totally different depending on the product used. Bits
  0 and 1 on port PB are usually used for I2C communication, but the
  kernel I2C driver sets the appropriate directions itself so you don't
  need to take that into consideration when setting this option.
  If you don't know what to use, it is always safe to put all as inputs.
  (NOTE! This is not totally true, since untied signals should be outputs
   due to LSI ESD bug)
  On the testboards, all of port PA and PB can be set as outputs since
  they have LED's. 
	Axis 2100 (Lisa) should have: 1f
	Axis 7000 InfoSender should have: ff
	Axis 5600 should have: fe (0 sda, scl, wp, rest untied (out))
	Axis 2490 should have: 1e (0 sda, scl, i2csel, com1_enb, dtr,ri,dsr,cd)
	Axis Dev. Board should have: 1e (0 sda, scl, i2csel, com1_enb, dtr,ri,dsr,cd)

Etrax General port B data
DEF_R_PORT_PB_DATA
  Configures the initial data for the general port A bits. Most products
  should use FF here.
	Axis 7000 InfoSender should have: c3
	Axis 2490 (Bundy) should have: f3
	Axis Dev. Board (Bundy) should have: f3

Etrax General port device
CONFIG_ETRAX_GPIO
  Enables the Etrax general port device (major 120, minors 0 and 1).
  You can use this driver to access the general port bits. It supports
  these ioctl's:
        #include <linux/etraxgpio.h>
	fd = open("/dev/gpioa", O_RDWR); // or /dev/gpiob
    	ioctl(fd, _IO(ETRAXGPIO_IOCTYPE, IO_SETBITS), bits_to_set);
    	ioctl(fd, _IO(ETRAXGPIO_IOCTYPE, IO_CLRBITS), bits_to_clear);
	val = ioctl(fd, _IO(ETRAXGPIO_IOCTYPE, IO_READBITS), NULL);
  Remember that you need to setup the port directions appropriately in 
  the General configuration.

Etrax parallel data support
CONFIG_ETRAX100_PARDATA
  Adds support for writing data to the parallel port par0 of the ETRAX 100.
  If you create a character special file with major number 126, you can
  write to the data bits of par0.
  Note: you need to disable Etrax100 parallel port support.

Etrax parallel LCD (HD44780) Driver
CONFIG_LCD_HD44780
  Adds support for a HD44780 controlled LCD connected to the parallel
  port par0 of the Etrax.

Etrax Serial port ser0 and ser1 support
CONFIG_ETRAX100_SERIAL
  Enables the ETRAX 100 serial driver for ser0 and ser1 (ttyS0, ttyS1)
  You probably want this enabled.

/proc/serial entry
CONFIG_SERIAL_PROC_ENTRY
  Enables /proc/serial entry where errors and statistics can be viewed.
  CONFIG_PROC_FS must also be set for this to work.

Etrax Serial port fast flush of DMA
CONFIG_ETRAX100_SERIAL_FLUSH_DMA_FAST
  Select this to have the serial DMAs flushed at a higher rate than normally
  possible through a fast timer interrupt (currently at 15360 Hz).
  If unsure, say N.

Etrax Serial port receive flush timeout
CONFIG_ETRAX100_SERIAL_RX_TIMEOUT_TICKS
  Number of timer ticks between flush of receive fifo (1 tick = 10ms).
  Try 0-3 for low latency applications. Approx 5 for high load 
  applications (e.g. PPP). Maybe this should be more adaptive some day...

Etrax Serial port ser0 DTR, RI, DSR and CD support on PB
CONFIG_ETRAX100_SER0_DTR_RI_DSR_CD_ON_PB 
  Enables the status and control signals DTR, RI, DSR and CD on PB for ser0:
	  Axis 2490 (Bundy) uses PB 4, 5, 6 and 7 for ser0.
	  Axis Dev. Board (Bundy) uses PB 4, 5, 6 and 7 for ser0.

Etrax Serial port ser1 DTR, RI, DSR and CD support on PB
CONFIG_ETRAX100_SER1_DTR_RI_DSR_CD_ON_PB 
  Enables the status and control signals DTR, RI, DSR and CD on PB for ser1:
	  Axis 2100 (Lisa) uses PB 4, 5, 6 and 7 for ser1.


Etrax Serial port ser2 support
CONFIG_ETRAX100_SERIAL_PORT2
  Enables the ETRAX 100 serial driver for ser2 (ttyS2)

Etrax Serial port ser2 DTR, RI, DSR and CD support on PA
CONFIG_ETRAX100_SER2_DTR_RI_DSR_CD_ON_PA 
  Enables the status and control signals DTR, RI, DSR and CD on PA for ser2:
	  Axis 2490 (Bundy) uses PA 4, 5, 6 and 7 for ser2.
	  Axis Dev. Board (Bundy) uses PA 4, 5, 6 and 7 for ser2.


Etrax100 Serial port ser3 support
CONFIG_ETRAX100_SERIAL_PORT3
  Enables the ETRAX 100 serial driver for ser3 (ttyS3)

Etrax100 RS-485 Support
CONFIG_RS485
  Enables support for RS-485 serial communication

Etrax100 RS-485 mode on PA
CONFIG_RS485_ON_PA
  Control Driver Output Eanble on RS485 tranceiver using a pin on PA port:
          Axis 2400/2401 uses PA 3.

Etrax100 RS-485 disable receiver
CONFIG_RS485_DISABLE_RECEIVER
  It's necessary to disable the serial receiver to avoid serial loopback.
  Not all products are able to do this in software only. Axis 2400/2401
  must disable receiver.

Etrax100 I2C Support
CONFIG_ETRAX100_I2C_MANUALLY
  Enables an I2C driver on PB0 and PB1 on ETRAX100.
  EXAMPLE usage:
        i2c_arg = I2C_WRITEARG(STA013_WRITE_ADDR, reg, val);
	ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_WRITEREG), i2c_arg);
	i2c_arg = I2C_READARG(STA013_READ_ADDR, reg);
	val = ioctl(fd, _IO(ETRAXI2C_IOCTYPE, I2C_READREG), i2c_arg);

Etrax100 I2C EEPROM (NVRAM) support
CONFIG_I2C_EEPROM
  Enables I2C EEPROM (non-volatile RAM) on PB0 and PB1 using the I2C driver.

Etrax100 I2C EEPROM (NVRAM) size/probe 
CONFIG_I2C_EEPROM_PROBE
  Specifies size or auto probe of the EEPROM size.
  Options: Probed, 2k, 8k, 16k
  (Probing works for 2k and 8k but no that well for 16k)

Axis Artpec-1 (Juliette) realtime image compression chip support
CONFIG_JULIETTE
  Enables driver for Axis Artpec-1 (Juliette) realtime image compression chip.
  Used in Axis camera products.
  Etrax100 I2C support must be enabled as well.

Etrax DS1302 RTC driver
CONFIG_DS1302
  Enables the driver for the DS1302 Real-Time Clock battery-backed
  chip on some products. The kernel reads the time when booting, and
  the date can be set using ioctl(fd, RTC_SET_TIME, &rt) with rt a
  rtc_time struct (see asm/rtc.h) on the /dev/rtc device, major 121.
  You can check the time with cat /proc/rtc, but normal time reading
  should be done using libc function time and friends.
	Axis Dev. Board (Bundy) has the DS1302 on the same pins as 
	the EEPROM: SDA, SCL + _TK_RST/_I2C_SELECT on 
	PB0, PB1, PB2.


Etrax DS1302 RST on the Generic Port
CONFIG_DS1302_RST_ON_GENERIC_PORT
  If your product (notably the 2100 (Lisa) camera) has the RST signal line for
  the DS1302 RTC on the Generic Port then say Y here, otherwise leave
  it as N in which case the RST signal line is assumed to be connected
  to Port PB (just like the SCL and SDA lines).
	Axis Dev. Board (Bundy) should have: n 

Etrax DS1302 RST bit number
CONFIG_DS1302_RSTBIT
  This is the bit number for the RST signal line of the DS1302 RTC on
  the selected port. If you have selected the generic port then it
  should be bit 27, otherwise your best bet is bit 5.
	Axis Dev. Board (Bundy) should have: 2 

Etrax DS1302 SCL bit number
CONFIG_DS1302_SCLBIT
  This is the bit number for the SCL signal line of the DS1302 RTC on
  Port PB. This is probably best left at 3.
	Axis Dev. Board (Bundy) should have: 1 

Etrax DS1302 SDA bit number
CONFIG_DS1302_SDABIT
  This is the bit number for the SDA signal line of the DS1302 RTC on
  Port PB. This is probably best left at 2.
	Axis Dev. Board (Bundy) should have: 0 
  
Kernel math emulation
CONFIG_MATH_EMULATION
  Linux can emulate a math coprocessor (used for floating point
  operations) if you don't have one. 486DX and Pentium processors have
  a math coprocessor built in, 486SX and 386 do not, unless you added
  a 487DX or 387, respectively.  (The messages during boot time can
  give you some hints here ["man dmesg"]) Everyone needs either a
  coprocessor or this emulation. If you enable this emulation even
  though you have a coprocessor, the coprocessor will be used
  nevertheless. (This behavior can be changed with the kernel command
  line option "no387", which comes handy if your coprocessor is
  broken. See the documentation of your boot loader (lilo or loadlin)
  about how to pass options to the kernel at boot time. The lilo
  procedure is also explained in the SCSI-HOWTO, available via FTP
  (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.) This
  means that it is a good idea to say Y here if you intend to use this
  kernel on different machines. More information about the internals
  of Linux math coprocessor emulation can be found in
  arch/i386/math-emu/README. If you are not sure, say Y; apart from
  resulting in a 45kB bigger kernel, it won't hurt.

Max physical memory
CONFIG_MAX_MEMSIZE
  Linux/x86 can use up to ~3.5 gigabytes of physical memory. Default
  is maximum 950 megabyte physical memory, this is enough for most
  systems. (if you have more than 900MB RAM, see
  Documentation/more-than-900MB-RAM.txt how to configure this option. Do
  not change this value if you have less than 950MB RAM!)

Normal floppy disk support
CONFIG_BLK_DEV_FD
  If you want to use your floppy disk drive(s) under Linux, say Y.
  Information about this driver, especially important for IBM Thinkpad
  users, is contained in drivers/block/README.fd.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

RAM disk support
CONFIG_BLK_DEV_RAM
  Enabling this option will allow you to use a portion of your RAM
  memory as a block device, so that you can make filesystems on it,
  read and write to it and do all the other things that normal block
  devices (such as hard drives) can do. It is usually used to load and
  store a copy of a minimal root file system off of a floppy into RAM
  during the initial install of Linux. Note that the kernel command
  line option "ramdisk=XX" is now obsolete. For details, read
  Documentation/ramdisk.txt. If you want to compile this as a module
  ( = code which can be inserted in and removed from the running
  kernel whenever you want), say M and read Documentation/modules.txt.
  Most normal users won't need the RAM disk functionality, and can
  thus say N here.

Flash block device support
CONFIG_BLK_DEV_FLASH
  This option enables the Flash memory block device. It provides
  functionality to read, write and erase Flash chips in the system.
  The chips are logically partitioned using a partition-table in the
  bootblock of the first chip. The first device minor is always the
  bootblock itself (/dev/flash0) and the rest are the configured
  partitions. If the bootblock is not configured yet, /dev/flash1 is
  set to span the entire flash (for testing etc). A bootblock with
  a partitiontable is written to the /dev/flash0 device using the
  sash command 'writeboot' (or special software). An example:
  13# writeboot
  usage: writeboot device hwid macadr start size0 [sizes]
  13# writeboot /dev/flash0 0x42 00-40-8C-18-04-60 0 0x180000 0x70000
  Where start is the starting offset of the first real partition after
  the bootblock, and the following numbers are the sizes of the
  partitions. In the above example, two partitions will be created
  with sizes 0x180000 and 0x70000, and they will be available as the
  devices /dev/flash1 and /dev/flash2 after a boot.
  Flash devices can be written to using normal writes, for example
  it is possible to copy a flash image onto a flash partition using
  a simple cp command. Erasure of a partition is handled by the
  ioctl call FLASHIO_ERASEALL, or by the sash command eraseflash.

Initial RAM disk (initrd) support
CONFIG_BLK_DEV_INITRD
  The initial RAM disk is a RAM disk that is loaded by the boot loader
  (LOADLIN or LILO) and that is mounted as root before the normal boot
  procedure. It is typically used to load modules needed to mount the
  "real" root file system, etc. See Documentation/initrd.txt for
  details.

Loop device support
CONFIG_BLK_DEV_LOOP
  Enabling this option will allow you to mount a file as a file
  system.  This is useful if you want to check an ISO9660 file system
  before burning the CD, or want to use floppy images without first
  writing them to floppy.  This option also allows one to mount a
  filesystem with encryption.  To use these features, you need a
  recent version of mount (check the file Documentation/Changes for
  location and latest version).  Note that this loop device has
  nothing to do with the loopback device used for network connections
  from the machine to itself.  Most users will answer N here.

Etrax 100 IDE Reset
CONFIG_ETRAX_IDE_PB7_RESET
  Configures the pin used to reset the IDE bus. Port PB Bit 7 is used
  for the StorPoint hardware and Port G bit 27 is used on the 
  Etrax 100 test card. Port CSE1 bit 16 is used on patched 2400 with ATA. 
 
Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support
CONFIG_BLK_DEV_IDE
  This will use the full-featured IDE driver to control up to four
  IDE interfaces, for a combination of up to eight IDE
  disk/cdrom/tape/floppy drives.  Useful information about large
  (>540MB) IDE disks, sound card IDE ports, and other topics, is all
  contained in Documentation/ide.txt.  If you have one or more IDE
  drives, say Y here.  If your system has no IDE drives, or if
  memory requirements are really tight, you could say N here, and
  select the Old hard disk driver instead to save about 13kB of
  memory in the kernel.  To fine-tune IDE drive/interface parameters
  for improved performance, look for the hdparm package at
  sunsite.unc.edu:/pub/Linux/kernel/patches/diskdrives/

Old hard disk (MFM/RLL/IDE) driver
CONFIG_BLK_DEV_HD_ONLY
  There are two drivers for MFM/RLL/IDE disks.  Most people use the
  newer enhanced driver, but the old one is still around for two
  reasons.  Some older systems have strange timing problems and seem
  to work only with the old driver (which itself does not work with
  some newer systems).  The other reason is that the old driver is
  smaller, since it lacks the enhanced functionality of the new one.
  This makes it a good choice for systems with very tight memory
  restrictions, or for systems with only older MFM/RLL/ESDI drives.
  Choosing the old driver can save 13kB or so of kernel memory.  If
  you are unsure, then just choose the Enhanced IDE/MFM/RLL driver
  instead of this one.

Use old disk-only driver on primary interface
CONFIG_BLK_DEV_HD_IDE
  There are two drivers for MFM/RLL/IDE disks.  Most people use just
  the new enhanced driver by itself.  This option installs the old
  hard disk driver to control the primary IDE/disk interface in the
  system, leaving the new enhanced IDE driver take care of only the
  2nd/3rd/4th IDE interfaces. Doing this will prevent you from having
  an IDE/ATAPI CDROM or tape drive connected to the primary IDE
  interface. Choosing this option may be useful for older systems
  which have MFM/RLL/ESDI controller+drives at the primary port
  address (0x1f0), along with IDE drives at the secondary/3rd/4th port
  addresses.  Normally, just say N here; you will then use the new
  driver for all 4 interfaces.

Use multi-mode by default
CONFIG_IDEDISK_MULTI_MODE
  If you get this error, try to enable this option.

  hda: set_multmode: status=0x51 { DriveReady SeekComplete Error }
  hda: set_multmode: error=0x04 { DriveStatusError }

  If in doubt, say N.

Include IDE/ATAPI CDROM support
CONFIG_BLK_DEV_IDECD
  If you have a CDROM drive using the ATAPI protocol, say Y.  ATAPI is
  a new protocol used by IDE CDROM and TAPE drives, similar to the
  SCSI protocol.  Most new CDROM drives use ATAPI, including the
  NEC-260, Mitsumi FX400, Sony 55E, and just about all non-SCSI
  double(2X), quad(4X), and six(6X) speed drives.  At boot time, the
  TAPE drive will be identified along with other IDE devices, as "hdb"
  or "hdc", or something similar.
  If this is your only CDROM drive, you can say N to all other CDROM
  options, but be sure to say Y to the ISO9660 filesystem.  Read the
  CDROM-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO and the file
  Documentation/cdrom/ide-cd.  Note that older versions of lilo (the
  Linux boot loader) cannot properly deal with IDE/ATAPI CDROMs, so
  install lilo-16 or higher, available from
  sunsite.unc.edu:/pub/Linux/system/Linux-boot/lilo.

Include IDE/ATAPI TAPE support
CONFIG_BLK_DEV_IDETAPE
  If you have an IDE tape drive using the ATAPI protocol, say Y.
  ATAPI is a new protocol used by IDE TAPE and ATAPI drives,
  similar to the SCSI protocol.  At boot time, the TAPE drive will
  be identified along with other IDE devices, as "hdb" or "hdc",
  or something similar, and will be mapped to a character device
  such as "ht0".  Be sure to consult the drivers/block/ide-tape.c
  and Documentation/ide.txt files for usage information.

Include IDE/ATAPI FLOPPY support (new)
CONFIG_BLK_DEV_IDEFLOPPY
  If you have an IDE floppy which uses the ATAPI protocol, say Y.
  ATAPI is a new protocol used by IDE cdrom/tape/floppy drives,
  similar to the SCSI protocol.  IDE floppy drives include the LS-120
  and the ATAPI ZIP (ATAPI PD-CD drives are not supported by this
  driver; support for PD-CD drives is available through the SCSI
  emulation).  At boot time, the FLOPPY drive will be identified along
  with other IDE devices, as "hdb" or "hdc", or something similar.

SCSI emulation support
CONFIG_BLK_DEV_IDESCSI
  This will provide SCSI host adapter emulation for IDE ATAPI devices,
  and will allow you to use a SCSI device driver instead of a native
  ATAPI driver. This is useful if you have an ATAPI device for which
  no native driver has been written (for example, an ATAPI PD-CD
  drive); you can then use this emulation together with an appropriate
  SCSI device driver. If both this SCSI emulation and native ATAPI
  support are compiled into the kernel, the native support will be
  used.  Normally, say N.

Support removable IDE interfaces (PCMCIA)
CONFIG_BLK_DEV_IDE_PCMCIA
  This option adds code to the IDE driver to handle hot insertion
  and removal of IDE interfaces and drives, under direction of an
  external utility (?).  Normally, just say N here.

CMD640 chipset bugfix/support
CONFIG_BLK_DEV_CMD640
  The CMD-Technologies CMD640 chip is used on many common 486 and
  Pentium motherboards, usually in combination with a "Neptune" or
  "SiS" chipset.  Unfortunately, it has a number of rather nasty
  design flaws that can cause severe data corruption under many common
  conditions.  Say Y here to include code which tries to automatically
  detect and correct the problems under Linux.  This option also
  enables access to the secondary IDE ports in some CMD640 based
  systems.  This driver will work automatically in PCI based systems
  (most new systems have PCI slots).  But if your system uses VESA
  local bus (VLB) instead of PCI, you must also supply a kernel boot
  parameter to enable the CMD640 bugfix/support: "ide0=cmd640_vlb" The
  CMD640 chip is also used on add-in cards by Acculogic, and on the
  "CSA-6400E PCI to IDE controller" that some people have. For
  details, read Documentation/ide.txt. If unsure, say Y.

CMD640 enhanced support
CONFIG_BLK_DEV_CMD640_ENHANCED
  This option includes support for setting/autotuning PIO modes and
  prefetch on CMD640 IDE interfaces.  For details, read
  Documentation/ide.txt. If you have a CMD640 IDE interface and your
  BIOS does not already do this for you, then say Y here.  Otherwise
  say N.

RZ1000 chipset bugfix/support
CONFIG_BLK_DEV_RZ1000
  The PC-Technologies RZ1000 chip is used on many common 486 and
  Pentium motherboards, usually along with the "Neptune" chipset.
  Unfortunately, it has a rather nasty design flaw that can cause
  severe data corruption under many conditions.  Say Y here to include
  code which automatically detects and corrects the problem under
  Linux.  This may slow disk throughput by a few percent, but at least
  things will operate 100% reliably. If unsure, say Y.

Other IDE chipset support
CONFIG_IDE_CHIPSETS
  Say Y here if you want to include enhanced support for various IDE
  interface chipsets used on motherboards and add-on cards.  This
  enhanced support may be necessary for Linux to be able to access the
  3rd/4th drives in some systems.  It may also enable setting of
  higher speed I/O rates to improve system performance with these
  chipsets.  Most of these also require special kernel boot parameters
  to actually turn on the support at runtime.

DTC-2278 support
CONFIG_BLK_DEV_DTC2278
  This driver is enabled at runtime using the "ide0=dtc2278" kernel
  boot parameter.  It enables support for the secondary IDE interface
  of the DTC-2278 card, and permits faster I/O speeds to be set as
  well.  See the Documentation/ide.txt and dtc2278.c files for more
  info.

Holtek HT6560B support
CONFIG_BLK_DEV_HT6560B
  This driver is enabled at runtime using the "ide0=ht6560b" kernel
  boot parameter.  It enables support for the secondary IDE interface
  of the Holtek card, and permits faster I/O speeds to be set as well.
  See the Documentation/ide.txt and ht6560b.c files for more info.

QDI QD6580 support
CONFIG_BLK_DEV_QD6580
  This driver is enabled at runtime using the "ide0=qd6580" kernel
  boot parameter.  It permits faster I/O speeds to be set.  See the
  Documentation/ide.txt and qd6580.c files for more info.

UMC 8672 support
CONFIG_BLK_DEV_UMC8672
  This driver is enabled at runtime using the "ide0=umc8672" kernel
  boot parameter.  It enables support for the secondary IDE interface
  of the UMC-8672, and permits faster I/O speeds to be set as well.
  See the Documentation/ide.txt and umc8672.c files for more info.

ALI M14xx support
CONFIG_BLK_DEV_ALI14XX
  This driver is enabled at runtime using the "ide0=ali14xx" kernel
  boot parameter.  It enables support for the secondary IDE interface
  of the ALI M1439/1443/1445/1487/1489 chipsets, and permits faster
  I/O speeds to be set as well.  See the Documentation/ide.txt and
  ali14xx.c files for more info.

PROMISE DC4030 support (EXPERIMENTAL)
CONFIG_BLK_DEV_PROMISE
  This driver is enabled at runtime using the "ide0=dc4030" kernel
  boot parameter.  It enables support for the secondary IDE interface
  of the chipset, and takes advantage of the caching features of the
  card.  This driver is known to incur timeouts/retries during heavy
  I/O to drives attached to the secondary interface.  CDROM and TAPE
  devices are not supported yet.  See the Documentation/ide.txt and
  promise.c files for more info.

XT hard disk support
CONFIG_BLK_DEV_XD
  Very old 8 bit hard disk controllers used in the IBM XT computer.
  To include a driver for these, say Y.  If you want to compile the
  driver as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want), say M here and read
  Documentation/modules.txt.
  It's pretty unlikely that you have one of these: say N.

Mylex DAC960/DAC1100 PCI RAID Controller support
CONFIG_BLK_DEV_DAC960
  This driver adds support for the Mylex DAC960, AcceleRAID, and
  eXtremeRAID PCI RAID controllers.  See README.DAC960 for further
  information about this driver.

Parallel port IDE device support
CONFIG_PARIDE
  There are many external CD-ROM and disk devices that connect through
  your computer's parallel port. Most of them are actually IDE devices
  using a parallel port IDE adapter. This option enables the PARIDE
  subsystem which contains drivers for many of these external drives.
  Read linux/Documentation/paride.txt for more information.
  If you built PARIDE support into your kernel, you may still build
  the individual protocol modules and high-level drivers as loadable
  modules. If you build this support as a module, it will be called
  paride.o. To use the PARIDE support, you must say Y or M here and
  also to at least one high-level driver (e.g. "Parallel port IDE
  disks", "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks"
  etc.) and to at least one protocol driver (e.g. "ATEN EH-100
  protocol", "MicroSolutions backpack protocol", "DataStor Commuter
  protocol" etc.).

Parallel port IDE disks
CONFIG_PARIDE_PD
  This option enables the high-level driver for IDE-type disk devices 
  connected through a parallel port.  If you chose to build PARIDE 
  support into your kernel, you may answer Y here to build in the 
  parallel port IDE driver, otherwise you should answer M to build 
  it as a loadable module.  The module will be called pd.o.  You 
  must also have at least one parallel port protocol driver in your 
  system.  Among the devices supported by this driver are the SyQuest 
  EZ-135, EZ-230 and SparQ drives, the Avatar Shark and the backpack
  hard drives from MicroSolutions.

Parallel port ATAPI CD-ROMs
CONFIG_PARIDE_PCD
  This option enables the high-level driver for ATAPI CD-ROM devices
  connected through a parallel port. If you chose to build PARIDE
  support into your kernel, you may answer Y here to build in the
  parallel port ATAPI CD-ROM driver, otherwise you should answer M to
  build it as a loadable module. The module will be called pcd.o. You
  must also have at least one parallel port protocol driver in your
  system. Among the devices supported by this driver are the
  MicroSolutions backpack CD-ROM drives and the Freecom Power CD. If
  you have such a CD-ROM drive, you should also say Y to "ISO9660
  cdrom filesystem support" below, because that's the filesystem used
  on CDROMs.

Parallel port ATAPI disks
CONFIG_PARIDE_PF
  This option enables the high-level driver for ATAPI disk devices
  connected through a parallel port.  If you chose to build PARIDE
  support into your kernel, you may answer Y here to build in the
  parallel port ATAPI disk driver, otherwise you should answer M
  to build it as a loadable module.  The module will be called pf.o.
  You must also have at least one parallel port protocol driver in
  your system.  Among the devices supported by this driver are the
  MicroSolutions backpack PD/CD drive and the Imation Superdisk
  LS-120 drive.

Parallel port ATAPI tapes
CONFIG_PARIDE_PT
  This option enables the high-level driver for ATAPI tape devices
  connected through a parallel port.  If you chose to build PARIDE
  support into your kernel, you may answer Y here to build in the
  parallel port ATAPI tape driver, otherwise you should answer M
  to build it as a loadable module.  The module will be called pt.o.
  You must also have at least one parallel port protocol driver in
  your system.  Among the devices supported by this driver is the
  parallel port version of the HP 5GB drive.

Parallel port generic ATAPI devices
CONFIG_PARIDE_PG
  This option enables a special high-level driver for generic ATAPI
  devices connected through a parallel port. The driver allows user
  programs, such as cdrecord, to send ATAPI commands directly to
  a device.  If you chose to build PARIDE support into your kernel,
  you may answer Y here to build in the parallel port generic ATAPI
  driver, otherwise you should answer M to build it as a loadable
  module.  The module will be called pg.o.  You must also have at
  least one parallel port protocol driver in your system.  This driver
  implements an API loosely related to the generic SCSI driver.  See
  /usr/include/linux/pg.h for details.  You can obtain the most recent
  version of cdrecord from ftp://ftp.fokus.gmd.de/pub/unix/cdrecord/ .
  Versions 1.6.1a3 and later fully support the pg driver.

ATEN EH-100 protocol
CONFIG_PARIDE_ATEN 
  This option enables support for the ATEN EH-100 parallel port IDE
  protocol.  This protocol is used in some inexpensive low performance 
  parallel port kits made in Hong Kong.  If you chose to build PARIDE 
  support into your kernel, you may answer Y here to build in the 
  protocol driver, otherwise you should answer M to build it as a 
  loadable module.  The module will be called aten.o.  You must also 
  have a high-level driver for the type of device that you want to 
  support.

MicroSolutions backpack protocol
CONFIG_PARIDE_BPCK 
  This option enables support for the MicroSolutions backpack 
  parallel port IDE protocol.  If you chose to build PARIDE support
  into your kernel, you may answer Y here to build in the protocol
  driver, otherwise you should answer M to build it as a loadable
  module.  The module will be called bpck.o.  You must also have
  a high-level driver for the type of device that you want to support.

DataStor Commuter protocol
CONFIG_PARIDE_COMM
  This option enables support for the Commuter parallel port IDE
  protocol from DataStor.  If you chose to build PARIDE support
  into your kernel, you may answer Y here to build in the protocol
  driver, otherwise you should answer M to build it as a loadable
  module.  The module will be called comm.o.  You must also have
  a high-level driver for the type of device that you want to support.

DataStor EP-2000 protocol
CONFIG_PARIDE_DSTR
  This option enables support for the EP-2000 parallel port IDE
  protocol from DataStor.  If you chose to build PARIDE support
  into your kernel, you may answer Y here to build in the protocol
  driver, otherwise you should answer M to build it as a loadable
  module.  The module will be called dstr.o.  You must also have
  a high-level driver for the type of device that you want to support.

Shuttle EPAT/EPEZ protocol
CONFIG_PARIDE_EPAT
  This option enables support for the EPAT parallel port IDE
  protocol.  EPAT is a parallel port IDE adapter manufactured by
  Shuttle Technology and widely used in devices from major vendors
  such as Hewlett-Packard, SyQuest, Imation and Avatar.  If you
  chose to build PARIDE support into your kernel, you may answer Y
  here to build in the protocol driver, otherwise you should answer M
  to build it as a loadable module.  The module will be called epat.o.
  You must also have a high-level driver for the type of device that
  you want to support.

Shuttle EPIA protocol
CONFIG_PARIDE_EPIA
  This option enables support for the (obsolete) EPIA parallel port
  IDE protocol from Shuttle Technology.  This adapter can still be
  found in some no-name kits.  If you chose to build PARIDE support
  into your kernel, you may answer Y here to build in the protocol
  driver, otherwise you should answer M to build it as a loadable
  module.  The module will be called epia.o.  You must also have a
  high-level driver for the type of device that you want to support.

FIT TD-2000 protocol
CONFIG_PARIDE_FIT2
  This option enables support for the TD-2000 parallel port IDE
  protocol from Fidelity International Technology.  This is a simple
  (low speed) adapter that is used in some portable hard drives.
  If you chose to build PARIDE support into your kernel, you may
  answer Y here to build in the protocol driver, otherwise you should
  answer M to build it as a loadable module.  The module will be
  called fit2.o.  You must also have a high-level driver for the type
  of device that you want to support.

FIT TD-3000 protocol
CONFIG_PARIDE_FIT3
  This option enables support for the TD-3000 parallel port IDE
  protocol from Fidelity International Technology.  This protocol is
  used in newer models of their portable disk, CD-ROM and PD/CD
  devices.  If you chose to build PARIDE support into your kernel, you
  may answer Y here to build in the protocol driver, otherwise you
  should answer M to build it as a loadable module.  The module will
  be called fit3.o.  You must also have a high-level driver for the
  type of device that you want to support.

Freecom IQ ASIC-2 protocol
CONFIG_PARIDE_FRIQ
  This option enables support for version 2 of the Freecom IQ parallel
  port IDE adapter.  This adapter is used by the Maxell Superdisk 
  drive.  If you chose to build PARIDE support into your kernel, you
  may answer Y here to build in the protocol driver, otherwise you
  should answer M to build it as a loadable module. The module will be
  called friq.o. You must also have a high-level driver for the type
  of device that you want to support. 

FreeCom power protocol
CONFIG_PARIDE_FRPW
  This option enables support for the Freecom power parallel port IDE
  protocol.  If you chose to build PARIDE support into your kernel,
  you may answer Y here to build in the protocol driver, otherwise you
  should answer M to build it as a loadable module.  The module will
  be called frpw.o.  You must also have a high-level driver for the
  type of device that you want to support.

KingByte KBIC-951A/971A protocols
CONFIG_PARIDE_KBIC
  This option enables support for the KBIC-951A and KBIC-971A parallel
  port IDE protocols from KingByte Information Corp.  KingByte's
  adapters appear in many no-name portable disk and CD-ROM products,
  especially in Europe.  If you chose to build PARIDE support into
  your kernel, you may answer Y here to build in the protocol driver,
  otherwise you should answer M to build it as a loadable module.
  The module will be called kbic.o.  You must also have a high-level
  driver for the type of device that you want to support.

KT PHd protocol
CONFIG_PARIDE_KTTI
  This option enables support for the "PHd" parallel port IDE protocol
  from KT Technology.  This is a simple (low speed) adapter that is
  used in some 2.5" portable hard drives.  If you chose to build
  PARIDE support into your kernel, you may answer Y here to build in
  the protocol driver, otherwise you should answer M to build it as a
  loadable module.  The module will be called ktti.o.  You must also
  have a high-level driver for the type of device that you want to
  support.

OnSpec 90c20 protocol
CONFIG_PARIDE_ON20
  This option enables support for the (obsolete) 90c20 parallel port
  IDE protocol from OnSpec (often marketed under the ValuStore brand
  name).  If you chose to build PARIDE support into your kernel, you
  may answer Y here to build in the protocol driver, otherwise you
  should answer M to build it as a loadable module.  The module will
  be called on20.o.  You must also have a high-level driver for the
  type of device that you want to support.

OnSpec 90c26 protocol
CONFIG_PARIDE_ON26
  This option enables support for the 90c26 parallel port IDE protocol
  from OnSpec Electronics (often marketed under the ValuStore brand
  name).  If you chose to build PARIDE support into your kernel, you
  may answer Y here to build in the protocol driver, otherwise you
  should answer M to build it as a loadable module.  The module will
  be called on26.o.  You must also have a high-level driver for the
  type of device that you want to support.

Multiple devices driver support
CONFIG_BLK_DEV_MD
  This driver lets you combine several hard disk partitions into one
  logical block device.  Information about how and why to use it and
  the necessary tools are available over FTP (user: anonymous) from
  sweet-smoke.ufr-info-p7.ibp.fr/pub/public/Linux in the md package
  and the md-FAQ. Please read drivers/block/README.md.  If unsure,
  say N.

Linear (append) mode
CONFIG_MD_LINEAR
  If you enable this, then your multiple devices driver will be able
  to use the so-called linear mode, i.e. it will combine the hard disk
  partitions by simply appending one to the other. If you want to
  compile this as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt. If unsure, say Y.

RAID-0 (striping) mode
CONFIG_MD_STRIPED
  If you enable this, then your multiple devices driver will be able
  to use the so-called raid0 mode, i.e. it will combine the hard disk
  partitions into one logical device in such a fashion as to fill them
  up evenly, one chunk here and one chunk there. This will increase
  the throughput rate if the partitions reside on distinct disks.  If
  you want to compile this as a module ( = code which can be inserted
  in and removed from the running kernel whenever you want), say M
  here and read Documentation/modules.txt. If unsure, say Y.

RAID-1 (mirroring) mode
CONFIG_MD_MIRRORING
  A RAID-1 set consists of several disk drives which are exact copies
  of each other. In the event of a mirror failture, the RAID driver
  will continue to use the operational mirrors in the set, providing
  an error free MD device to the higher levels of the kernel. In
  a set with N drives, the available space is the capacity of a single
  drive, and the set protects against a failture of (N - 1) drives.
  raidtools, a set of user-space tools which create and maintain
  RAID1/4/5 sets, is available at:
  http://luthien.nuclecu.unam.mx/~miguel/raid

RAID-4/RAID-5 mode
CONFIG_MD_RAID5
  A RAID-5 set of N drives with a capacity of C MB per drive provides
  the capacity of C * (N - 1) drives, and protects against a failture
  of a single drive. For a given sector (row) number, (N - 1) drives
  contain data sectors, and one drive contains the parity protection.
  For a RAID-4 set, the parity blocks are present on a single drive,
  while a RAID-5 set distributes the parity accross the drives in one
  of the available parity distribution methods.
  raidtools, a set of user-space tools which create and maintain
  RAID1/4/5 sets, is available at:
  http://luthien.nuclecu.unam.mx/~miguel/raid

Support for Deskstation RPC44
CONFIG_DESKSTATION_RPC44
  This is a machine with a R4400 100 MHz CPU. To compile a Linux
  kernel that runs on these, say Y here. For details about Linux on
  the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
  http://lena.fnet.fr/ (To browse the WWW, you need to have access
  to a machine on the Internet that has one of the programs lynx,
  netscape or Mosaic).

Support for Mips Magnum 3000
CONFIG_MIPS_MAGNUM_3000
  To compile a Linux kernel that runs on these, say Y here. For
  details about Linux on the MIPS architecture, check out the
  Linux/MIPS FAQ on the WWW at http://lena.fnet.fr/ (To browse the
  WWW, you need to have access to a machine on the Internet that has
  one of the programs lynx, netscape or Mosaic).

Support for Mips Magnum 4000
CONFIG_MIPS_MAGNUM_4000
  This is a machine with a R4000 100 MHz CPU. To compile a Linux
  kernel that runs on these, say Y here. For details about Linux on
  the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
  http://lena.fnet.fr/ (To browse the WWW, you need to have access
  to a machine on the Internet that has one of the programs lynx,
  netscape or Mosaic).

Support for Olivetti M700
CONFIG_OLIVETTI_M700
  This is a machine with a R4000 100 MHz CPU. To compile a Linux
  kernel that runs on these, say Y here. For details about Linux on
  the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
  http://lena.fnet.fr/ (To browse the WWW, you need to have access
  to a machine on the Internet that has one of the programs lynx,
  netscape or Mosaic).

Support for Deskstation Tyne
CONFIG_DESKSTATION_TYNE
  This is a machine with a R4600 134 MHz CPU. The Linux port for this
  system is idle right now because of hardware or documentation
  problems. For details about Linux on the MIPS architecture, check
  out the Linux/MIPS FAQ on the WWW at http://lena.fnet.fr/ (To browse
  the WWW, you need to have access to a machine on the Internet that
  has one of the programs lynx, netscape or Mosaic).

Support for Acer PICA 1 chipset
CONFIG_ACER_PICA_61
  This is a machine with a R4400 134/150 MHz CPU. To compile a Linux
  kernel that runs on these, say Y here. For details about Linux on
  the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
  http://lena.fnet.fr/ (To browse the WWW, you need to have access
  to a machine on the Internet that has one of the programs lynx,
  netscape or Mosaic).

Support for DECstation
CONFIG_DECSTATION
  The DECStation 3100 (with a MIPS R2000 series CPU) and DECStation
  5000/xxx (MIPS R3000 series CPU) are also sometimes labeled PMAX.
  They often run the Ultrix operating system. To compile a Linux
  kernel that runs on these, say Y here. For details about Linux on
  the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at
  http://lena.fnet.fr/ (To browse the WWW, you need to have access
  to a machine on the Internet that has one of the programs lynx,
  netscape or Mosaic).

CPU type
CONFIG_CPU_R3000
  Give the type of your machine's MIPS CPU. For this question, it
  suffices to give a unique prefix of the option you want to choose.

Networking support
CONFIG_NET
  Unless you really know what you are doing, you should say Y here.
  The reason is that some programs need it even if you configure a
  stand-alone machine that won't be connected to any other computer.
  from an older kernel, you should consider updating your networking
  tools too; read net/README for details.

Network aliasing
CONFIG_NET_ALIAS
  This is for setting multiple IP addresses on the same low-level
  network device driver. Typically used for services that act
  differently based on the address they listen on (e.g. "multihosting"
  on Apache httpd) or for connecting to different logical networks
  through the same physical interface.  This is the generic part,
  later when configuring network protocol options you will be asked
  for protocol-specific aliasing support.  See
  Documentation/networking/alias.txt for more info.  If you need this
  feature (for any protocol, like IP) say Y; if unsure, say N.

Network firewalls
CONFIG_FIREWALL
  A firewall is a computer which protects a local network from the
  rest of the World: all traffic to and from computers on the local
  net is inspected by the firewall first.  If you want to configure
  your Linux box as a firewall for a local network, say Y here.  If
  your local network is TCP/IP based, you will have to say Y to "IP:
  firewalling", below.  You also need to say Y here and enable "IP
  firewalling" below in order to be able to use IP masquerading
  (i.e. local computers can chat with an outside host, but that
  outside host is made to think that it is talking to the firewall
  box. Makes the local network completely invisible and avoids the
  need to allocate valid IP host addresses for the machines on the
  local net) or to use the ip packet accounting to see what is using
  all your network bandwidth. Chances are that you should use this on
  any machine being run as a router and not on a host.
  If unsure, say N.

SYN flood protection
CONFIG_SYN_COOKIES
  Normal TCP/IP networking is open to an attack known as SYN flooding.
  This attack prevents legitimate users from being able to connect to
  your computer and requires very little work for the attacker.
  SYN cookies provide protection against this type of attack.  With
  this option turned on the TCP/IP stack will use a cryptographic
  challenge protocol known as SYN cookies to enable legitimate users
  to continue to connect, even when your machine is under attack.
  If you are SYN flooded, the source address reported by the kernel is
  likely to have been forged by the attacker.  The source address is
  reported as an aid in tracing the packets to their actual source.

Sun floppy controller support
CONFIG_BLK_DEV_SUNFD
  This is support for floppy drives on Sun SPARC workstations. Say Y
  if you have a floppy drive, otherwise N. Easy.

Alpha system type
CONFIG_ALPHA_AVANTI
  Find out what type of Alpha motherboard you have. You will probably
  want to read the Linux/Alpha home page on the WWW at
  http://www.azstarnet.com/~axplinux/ (To browse the WWW, you need to
  have access to a machine on the Internet that has one of the
  programs lynx, netscape or Mosaic). For this question, it suffices
  to give a unique prefix of the option you want to choose. The
  choices:
  ** Avanti: This is for Mustang (AS200), M3 (AS250), Avanti (AS400)
     and XL (a.k.a. "Windows NT Dream Machine" :-) AlphaStations.
     These usually come with a TGA graphics adapter, so you'll want to
     say Y to "TGA Console support", below, if you have one of these.
  ** Jensen: a.k.a. DEC 2000 a.k.a. DECpc AXP 150, the oldest Alpha
     PC; it sports an EISA bus. The boot process on Jensen machines is
     difficult (no booting from floppies, MILO doesn't work). You need
     to have access to a second Linux workstation. The Linux/Alpha
     FAQ, accessible from the above mentioned WWW page, has details.
  ** Noname: a.k.a. AXPpci33, a PCI-bus based board using the 21066
     Alpha CPU, running at either 166 or 233 MHz. You also want to
     choose this option if you have a UDB (Universal Desktop Box
     a.k.a. Multia) machine.
  ** Cabriolet: also called AlphaPC64, a PCI-bus based board using the
     21064 Alpha CPU typically running at 275 or 300 MHz.
  ** EB66: "Evaluation Board"
  ** EB66+: "Evaluation Board"
###
### Add info about Platform2000, EB164
###

Is it really a true XL
CONFIG_ALPHA_XL
  If your Avanti Machine is of type XL (a.k.a. "Windows NT Dream
  Machine") (as opposed to Mustang (AS200), M3 (AS250) or Avanti
  (AS400)), say Y, otherwise N.

Limit memory to low 16MB
CONFIG_MAX_16M
  This is for some buggy motherboards which cannot properly deal with
  the memory above 16MB. If you have more than 16MB of RAM and
  experience weird problems, you might want to try Y, everyone else
  says N. Note for machines with more that 64MB of RAM: in order for
  the kernel to be able to use the memory above 64MB, pass the command
  line option "mem=XXXM" (where XXX is the memory size in megabytes)
  to your kernel during boot time. See the documentation of your boot
  loader (lilo or loadlin) about how to pass options to the kernel.
  The lilo procedure is also explained in the SCSI-HOWTO, available
  via FTP (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.
  You also need at least 512kB of RAM cache if you have more than 64MB
  of RAM. Some other things to try when experiencing seemingly random,
  "weird" problems: 1) passing the "no-hlt" option to the kernel
  2) passing the "no-387" option to the kernel 3) passing the "mem=4M"
  option to the kernel (thereby disabling all but the first 4M of RAM)
  4) disabling the cache from your BIOS settings
  5) exchanging RAM chips  6) exchanging the motherboard.

Using SRM as bootloader
CONFIG_ALPHA_SRM
  There are two different types of booting firmware on Alphas: SRM,
  which is command line driven, and ARC, which uses menus and arrow
  keys. The usual way to load Linux on an Alpha machine is to use MILO
  (a bootloader that lets you pass command line parameters to the
  kernel just like LILO does) which can be loaded either from ARC or
  can be installed directly as a permanent firmware replacement from
  floppy (which requires changing a certain jumper on the
  motherboard). If you want to do either of these, say N here. If MILO
  doesn't work on your system (true for Jensen motherboards), you can
  bypass it altogether and boot Linux directly from an SRM console;
  say Y here in order to do that. Note that you won't be able to boot
  from an IDE disk using SRM. If unsure, say N. Details about the
  Linux/Alpha booting process are contained in the Linux/Alpha FAQ,
  accessible on the WWW from http://www.azstarnet.com/~axplinux/ (To
  browse the WWW, you need to have access to a machine on the Internet
  that has one of the programs lynx, netscape or Mosaic).

Echo console messages on /dev/ttyS1
CONFIG_SERIAL_ECHO
  If you enable this option, all kernel messages that would usually go
  to the console will also be sent to the device /dev/ttyS1 which
  corresponds to a serial port; this could be useful if you attached
  a terminal or printer to that port.

TGA Console Support
CONFIG_TGA_CONSOLE
  Many Alpha systems (e.g the Multia) are shipped with a graphics card
  that implements the TGA interface (much like the VGA standard, but
  older TGA adapters are *not* VGA compatible).  On such systems, this
  option needs to be enabled so that the TGA driver rather than the
  standard VGA driver is used.  Note that, at this time, there is no X
  server for these systems. If unsure, try N.

PCI bios support
CONFIG_PCI
  Find out whether you have a PCI motherboard. PCI is the name of a
  bus system, i.e. the way the CPU talks to the other stuff inside
  your box. Other bus systems are ISA, EISA, Microchannel (MCA) or
  VESA. If you have PCI, say Y, otherwise N. Note1: MCA systems
  (notably some IBM PS/2's) are not supported by the standard kernels,
  but patches exist at
  http://www.undergrad.math.uwaterloo.ca/~cpbeaure/mca-linux.html on
  the WWW. Note2: some old PCI motherboards have BIOS bugs and may
  crash if "PCI bios support" is enabled (but they run fine without
  this option). The PCI-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO, contains valuable information
  about which PCI hardware does work under Linux and which doesn't.
  If some of your PCI devices don't work and you get a warning during
  boot time ("man dmesg"), please follow the instructions at the top
  of include/linux/pci.h.

PCI bridge optimization (experimental)
CONFIG_PCI_OPTIMIZE
  This can improve access times for some hardware devices under
  certain BIOSes if your computer uses a PCI bus system. This is
  recommended; say Y.

Generic IDE (U)DMA support
CONFIG_BLK_DEV_TRITON
  If your PCI system uses an EIDE hard disk (as opposed to SCSI, say)
  and includes one of the Intel (U)DMA IDE Southbridge ICs (i82371FB,
  i82371SB or i82371AB), you will want to enable this option to allow
  use of bus-mastering DMA data transfers. This increases transfer
  rates and reduces latencies and CPU utilization. Read the comments in
  Documentation/ide.txt and Documentation/udma.txt.
  Check the file Documentation/Changes for location and latest version
  of the hdparm utility. There are now several more chipsets added, to
  include offboard PCI-IDE-UDMA cards and newer SiS and VIA chipsets.
  It is safe to say Y to this question, as long as your PCI bus is
  operating within specs (33MHz recommended).

Boot off-board chipsets first support
CONFIG_BLK_DEV_OFFBOARD
  Normally, IDE controllers built into the motherboard (on-board
  controllers) are assigned to ide0 and ide1 while those on add-in
  PCI cards (off-board controllers) are relegated to ide2 and ide3.
  Saying Y to here will reverse the situation, with off-board
  controllers on ide0/1 and on-board controllers on ide2/3. This
  can improve the usability of some boot managers such as LILO
  when booting from a drive on an off-board controller.
  Note that this will rearrange the order of the hd* devices and
  may require modification of fstab and other files.
  Check the file Documentation/udma.txt
  If in doubt, say N.

System V IPC
CONFIG_SYSVIPC
  Inter Process Communication is a suite of library functions and
  system calls which let processes ( = running programs) synchronize
  and exchange information. It is generally considered to be a good
  thing, and some programs won't run unless you enable this. In
  particular, if you want to run the DOS emulator dosemu under Linux
  (read the DOSEMU-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO), you'll need to say Y here.
  You can find documentation about IPC in ipc.info, which is contained
  in sunsite.unc.edu:/pub/Linux/docs/man/info.tar.gz (extract with
  "tar xzvf filename"). These docs are in the info format which is
  used to document GNU software and can be read from within emacs
  ("Ctrl-h i") or with the program info ("man info"). Enabling this
  option enlarges your kernel by about 7kB. Just say Y.

Kernel support for ELF binaries
CONFIG_BINFMT_ELF
  ELF (Executable and Linkable Format) is a format for libraries and
  executables used across different architectures and operating
  systems. This option will enable your kernel to run ELF binaries and
  enlarge it by about 2kB. ELF support under Linux is quickly
  replacing the traditional Linux a.out formats (QMAGIC and ZMAGIC)
  because it is portable (this does *not* mean that you will be able
  to run executables from different architectures or operating
  systems!) and makes building run-time libraries very easy. Many new
  executables are distributed solely in ELF format. You definitely
  want to say Y here. Information about ELF is on the WWW at
  http://www.sjc.ox.ac.uk/users/barlow/elf-howto.html (To browse the
  WWW, you need to have access to a machine on the Internet that has
  one of the programs lynx, netscape or Mosaic).  If you find that
  after upgrading to Linux kernel 1.3 and saying Y here, you still
  can't run any ELF binaries (they just crash), then you'll have to
  install the newest ELF runtime libraries, including ld.so (check the
  file Documentation/Changes for location and latest version). If you
  want to compile this as a module ( = code which can be inserted in
  and removed from the running kernel whenever you want), say M here
  and read Documentation/modules.txt. Saying M or N here is dangerous
  because some crucial programs on your system might be in ELF format.

Compile kernel as ELF -- if your GCC is ELF-GCC
CONFIG_KERNEL_ELF
  The gcc version 2.7.0 and newer produces the new ELF binary format
  as default. If you have such a compiler (try "gcc -v"), say Y here,
  otherwise N.
  It is possible, albeit almost pointless, to compile the kernel in
  a.out (i.e. QMAGIC) format even if your compiler produces ELF as
  default. For that, you would have to say N here and change the
  variables LD and CC in the toplevel Makefile. Similarly, if your
  compiler produces a.out by default but is able to produce ELF, you
  can compile the kernel in ELF by saying Y here and editing the
  variables CC and LD in the toplevel Makefile.

Kernel support for A.OUT binaries
CONFIG_BINFMT_AOUT
  A.out (Assembler.OUTput) is a set of formats for libraries and
  executables used in the earliest versions of UNIX. Linux used the
  a.out formats QMAGIC and ZMAGIC until they were replaced with the
  ELF format.
  As more and more programs are converted to ELF, the use for a.out
  will gradually diminish. If you disable this option it will reduce
  your kernel by one page. This is not much and by itself does not
  warrant removing support. However its removal is a good idea if you
  wish to ensure that absolutely none of your programs will use this
  older executable format. If you don't know what to answer at this
  point then answer Y. If someone told you "You need a kernel with
  QMAGIC support" then you'll have to say Y here. You may answer M
  to compile a.out support as a module and later load the module when
  you want to use a program or library in a.out format. Saying M or N
  here is dangerous though, because some crucial programs on your
  system might still be in A.OUT format.

Kernel support for JAVA binaries
CONFIG_BINFMT_JAVA
  JAVA is an object oriented programming language developed by SUN;
  JAVA programs are compiled into "JAVA bytecode" which can then be
  interpreted by run time systems on many different operating systems.
  These JAVA binaries are becoming a universal executable format. This
  option allows you to run a Java binary just like any other Linux
  program: by typing in its name. As more and more Java programs
  become available, the use for this will gradually increase. You can
  even execute HTML files containing JAVA applets ( = JAVA binaries)
  if those files start with the string "<!--applet-->". If you want to
  use this, read Documentation/java.txt and the Java on Linux HOWTO,
  available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. You will then need to install
  the run time system contained in the Java Developers Kit (JDK) as
  described in the HOWTO. If you disable this option it will reduce
  your kernel by about 4kB. This is not much and by itself does not
  warrant removing support. However its removal is a good idea if you
  do not have the JDK installed. If you don't know what to answer at
  this point then answer Y. You may answer M for module support and
  later load the module when you install the JDK or find an
  interesting Java program that you can't live without.

Processor type
CONFIG_M386
  This is the processor type of your CPU.  It is used for optimizing
  purposes.  In order to compile a kernel that can run on all CPU
  types (albeit not optimally fast), you can specify "386" here.  If
  you specify "486" or "Pentium" or "PPro", then the kernel will run
  on all of these CPUs: 486 and Pentium (=586) and Pentium Pro (=686).
  Here are the settings recommended for greatest speed:
   - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX and
     Cyrix/TI 486DLC/DLC2. Only "386" kernels will run on a 386 class
     machine.
   - "486" for the AMD/Cyrix/IBM/Intel DX4 or 486DX/DX2/SL/SX/SX2,
     AMD/Cyrix 5x86, NexGen Nx586 and UMC U5D or U5S
   - "Pentium" for the AMD K5, K6 and K6-3D, Cyrix MediaGX,
     Cyrix/IBM/National Semiconductor 6x86 and GXm, IDT Centaur
     WinChip C6, and Intel Pentium/Pentium MMX
   - "PPro" for the Cyrix/IBM/National Semiconductor 6x86MX, MII and
     Intel Pentium II/Pentium Pro
  In rare cases, it can make sense to specify "Pentium" even if
  running a 486: the kernel will be smaller but slightly slower.  On
  the other hand, if you use a compiler before gcc 2.7 (say "gcc -v"
  to find out), then you have to say "386" or "486" here even if
  running on a Pentium or PPro machine.

  If you don't know what to do, say "386".

Compile the kernel into the ELF object format
CONFIG_ELF_KERNEL
  ELF (Executable and Linkable Format) is a format for libraries and
  executables used across different architectures and operating
  systems. This option will cause the resulting kernel to be in ELF
  format, which is generally desirable, so say Y. However, it only
  works if your compiler and linker can produce ELF code.

Is your ELF compiler an extra compiler
CONFIG_EXTRA_ELF_COMPILER
  If you have a linuxelf-gcc as opposed to linux-gcc, say Y,
  otherwise N.

Generate little endian code
CONFIG_CPU_LITTLE_ENDIAN
  If your compiler is mipsel-linux-gcc or mipsel-linuxelf-gcc (as
  opposed to mips-linux-gcc or mips-linuxelf-gcc), say Y here,
  otherwise N. Most MIPS machines use little-endian code, but it might
  be necessary to run older Mips systems, such as the Sony News and
  MIPS RC3xxx, in big endian mode.

Enable loadable module support
CONFIG_MODULES
  Kernel modules are small pieces of compiled code which can be
  inserted in or removed from the running kernel, using the
  programs insmod and rmmod. This is described in the file
  Documentation/modules.txt. Modules can be device drivers, file
  systems, binary executable formats, and so on. If you think that
  you may want to make use of modules with this kernel in the future,
  then say Y here. If unsure, say Y.

Set version information on all symbols for modules
CONFIG_MODVERSIONS
  Usually, modules have to be recompiled whenever you switch to a new
  kernel.  Enabling this option makes it possible, and safe, to use
  the same modules even after compiling a new kernel; this requires
  the program modprobe. All the software needed for module support is
  in the modules package (check the file Documentation/Changes for
  location and latest version).  NOTE: if you say Y here but don't
  have the program genksyms (which is also contained in the above
  mentioned modules package), then the building of your kernel will
  fail.  If you are going to use modules that are generated from
  non-kernel sources, you would benefit from this option. Otherwise
  it's not that important.  So, N ought to be a safe bet.

Kernel daemon support
CONFIG_KERNELD
  Normally when you have selected some drivers and/or filesystems to
  be created as loadable modules, you also have the responsibility to
  load the corresponding module (via insmod/modprobe) before you can
  use it.  If you select Y here, the kernel will take care of this all
  by itself, together with the user level daemon "kerneld".  Note that
  "kerneld" will also automatically unload all unused modules, so you
  don't have to use "rmmod" either.
  kerneld will also provide support for different user-level beeper
  and screen blanker programs later on.
  The "kerneld" daemon is included in the package "modules-1.2.8" and
  later. You will probably want to read the kerneld mini-HOWTO,
  available via FTP (user: anonymous) from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini. If unsure, say Y.

ARP daemon support (EXPERIMENTAL)
CONFIG_ARPD
  Normally, the kernel maintains an internal cache which maps IP
  addresses to hardware addresses on the local network, so that
  Ethernet/Token Ring/ etc. frames are sent to the proper address on
  the physical networking layer.  For small networks having a few
  hundred directly connected hosts or less, keeping this address
  resolution (ARP) cache inside the kernel works well.  However,
  maintaining an internal ARP cache does not work well for very large
  switched networks, and will use a lot of kernel memory if TCP/IP
  connections are made to many machines on the network.  By enabling
  this option, the kernel's internal ARP cache will never grow to more
  than 256 entries (the oldest entries are expired in a LIFO manner)
  and communication will be attempted with an external ARP daemon,
  arpd.  This code is still experimental.  If you do enable arpd
  support, you should obtain a copy of arpd from
  http://www.loran.com/~layes/arpd/index.html.  If unsure, say N.

TCP/IP networking
CONFIG_INET
  These are the protocols used on the Internet and on most local
  Ethernets. The safest is to say Y here (which will enlarge your
  kernel by about 35 kB), since some programs (e.g. the X window
  system) use TCP/IP even if your machine is not connected to any
  other computer. You will get the so-called loopback device which
  allows you to ping yourself (great fun, that!). This option is also
  necessary if you want to use the full power of term (term is a
  program which gives you almost full Internet connectivity if you
  have a regular dial up shell account on some Internet connected Unix
  computer. Read the Term-HOWTO, available via FTP (user: anonymous)
  on sunsite.unc.edu:/pub/Linux/docs/HOWTO).  Short answer: say Y.

IP PING: ping can set IP address
CONFIG_PING_IPSET_ENABLED
  When dealing with small embedded devices without a hands on
  user interface, the arp+ping method of setting the initial
  IP address is convenient.
  You manually set an arp entry with the MAC address of the
  device you want to configure. You then ping the IP address
  you specified and the device will change it's IP.
  NOTE! This method might not works so well with devices
  that has multiple network interfaces and acts as bridges 
  or routers since you actually might want to ping a device
  "on the other side" through the device - you don't want it
  to change the IP then!
  Therefore you can specify so that the ping packet must have
  a certain length for it to change the IP.
  Presumably something not equal not 32 and 56 which is the
  packet size Windows and Linux uses as default.
  For an Axis device I suggest 408 since it resembles the
  MAC address serie: 00408Cxxxxxx
  The ability to change IP using ping us disabled after a 
  configurable time.

IP PING: ping IP set interfaces
CONFIG_PING_IPSET_INTERFACES
  This is a string with the interfaces that pings that changes
  the IP address are allowed.
  E.g. "eth0". You can have multiple interfaces here, strstr()
  is used to do the matching, eg. "eth0 ppp0"
  NOTE! This doesn't work yet since ther is no string type

IP PING: feature enabled time (seconds)
CONFIG_PING_IPSET_TIME_SEC
  The duration in seconds of how long this feature is enabled.
  Default 120 (2 minutes)

IP PING: valid packet length (0=any)
CONFIG_PING_IPSET_LENGTH
  Here you specify what length of ping packets that are allowed 
  to change the IP address. 0 = any length.
   For an Axis device I suggest 408 since it resembles the
  MAC address serie: 00408Cxxxxxx

IP PING: dont try to contact parhand 
CONFIG_PING_IPSET_DONT_USE_PARHAND
  Enable this parameter if you don't want to send information about
  the new IP address to parhand
  
IP: forwarding/gatewaying
CONFIG_IP_FORWARD
  People who want to use their Linux box as the router for a local
  network (i.e. the computer responsible for distributing Internet
  traffic to and from the machines in the local network and the
  subnetworks) should say Y here (thereby enlarging their kernel by
  about 5 kB). Note that in this case, you possibly have two Ethernet
  devices in your computer: one for the "outside world" and one for
  your local net. The kernel is not able to recognize both at boot
  time without help; for details read the
  Multiple-Ethernet-mini-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.  If your box is
  connected to two networks, it may still make sense to say N here,
  namely if you want to turn your box into a firewall protecting a
  local network from the Internet. The Firewall-HOWTO tells you how to
  do this. If your setup is more complex, say you are connected to
  three networks and you want to act as a firewall between two of them
  and route traffic for the others, you need to say Y here and enable
  IP firewalling below. If you intend to use IP masquerading (i.e. IP
  traffic from one of the local computers and destined for an outside
  host is changed by your box so that it appears to come from you),
  you'll have to say Y here and also to IP firewalling and IP
  masquerading below. You should also say Y here if you want to
  configure your box as a SLIP (the protocol for sending internet
  traffic over telephone lines) or PPP (a better SLIP) server for
  other people to dial into and your box is connected to a local
  network at the same time. You would then most likely use proxy-ARP
  (Address Resolution Protocol), explained in the Proxy-Arp mini howto
  on sunsite in /pub/Linux/docs/HOWTO/mini. You also need to say Y
  here if you want to run mrouted in order to do multicast routing as
  used on the MBONE (a high bandwidth network on top of the Internet
  which carries audio and video broadcasts) for example. In this case,
  say Y to "IP: multicasting" and "IP: multicast routing" as well. If
  unsure, say N.

IP: multicasting
CONFIG_IP_MULTICAST
  This is code for addressing several networked computers at once,
  enlarging your kernel by about 2 kB. If you are using gated, the
  daemon that updates your computer's routing tables, you will need to
  have this option compiled in. You also need multicasting if you
  intend to participate in the MBONE, a high bandwidth network on top
  of the Internet which carries audio and video broadcasts. More
  information about the MBONE is on the WWW at
  http://www.best.com/~prince/techinfo/mbone.html (to browse the WWW,
  you need to have access to a machine on the Internet that has one of
  the programs lynx, netscape or Mosaic). Information about the
  multicast capabilities of the various network cards is contained in
  drivers/net/README.multicast. For most people, it's safe to say N.

IP: optimize as router not host
CONFIG_IP_ROUTER
  Some Linux network drivers use a technique called copy and checksum
  to optimize host performance. For a machine which is forwarding most
  packets to another host this is however a loss. This parameter turns
  off copy and checksum from devices. It may make other changes in the
  future.

IP: firewalling
CONFIG_IP_FIREWALL
  If you want to configure your Linux box as a firewall for a local
  TCP/IP based network, say Y here. This will enlarge your kernel by
  about 2kB. You may need to read the FIREWALL-HOWTO, available via
  FTP (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.
  Also, you will need the ipfwadm tool (check the file
  Documentation/Changes for location and latest version) to allow
  selective blocking of internet traffic based on type, origin and
  destination.  You need to enable IP firewalling in order to be able
  to use IP masquerading (i.e. local computers can chat with an
  outside host, but that outside host is made to think that it is
  talking to the firewall box. Makes the local network completely
  invisible and avoids the need to allocate valid IP host addresses
  for the machines on the local net) or to use the IP packet
  accounting to see what is using all your network bandwidth.  This
  option is also needed when you want to enable the transparent
  proxying support (makes the computers on the local network think
  they're talking to a remote computer, while in reality the traffic
  is redirected by your Linux firewall to a local proxy server).

IP: accounting
CONFIG_IP_ACCT
  This keeps track of your IP network traffic and produces some
  statistics. Usually, you only want to say Y here if your box will be
  a router or a firewall for some local network, in which case you
  naturally should have said Y to IP forwarding/gatewaying resp. IP
  firewalling. The data is accessible with "cat /proc/net/ip_acct", so
  you want to say Y to the /proc filesystem below, if you say Y here.
  To specify what exactly should be recorded, you need the tool
  ipfwadm (check the file Documentation/Changes for location and
  latest version).

IP: tunneling
CONFIG_NET_IPIP
  Tunneling means encapsulating data of one protocol type within
  another protocol and sending it over a channel that understands the
  encapsulating protocol. This particular tunneling driver implements
  encapsulation of IP within IP, which sounds kind of pointless, but
  can be useful if you want to make your (or some other) machine
  appear on a different network than it physically is, or to use
  mobile-IP facilities (allowing laptops to seamlessly move between
  networks without changing their IP addresses; check out
  http://anchor.cs.binghamton.edu/~mobileip/LJ/index.html). Enabling
  this option will produce two modules ( = code which can be inserted
  in and removed from the running kernel whenever you want), one
  encapsulator and one decapsulator. You can read details in
  drivers/net/README.tunnel. Most people can say N.

IP: firewall packet logging
CONFIG_IP_FIREWALL_VERBOSE
  This gives you information about what your firewall did with packets
  it received.  The information is handled by the klogd demon which is
  responsible for kernel messages ("man klogd").

IP: transparent proxying (EXPERIMENTAL)
CONFIG_IP_TRANSPARENT_PROXY
  This enables your Linux firewall to transparently redirect any
  network traffic originating from the local network and destined
  for a remote host to a local server, called a "transparent proxy
  server".  This makes the local computers think they are talking to
  the remote end, while in fact they are connected to the local
  proxy. Redirection is activated by defining special input firewall
  rules (using the ipfwadm utility) and/or by doing an appropriate
  bind() system call.

IP: masquerading
CONFIG_IP_MASQUERADE
  If one of the computers on your local network for which your Linux
  box acts as a firewall wants to send something to the outside, your
  box can "masquerade" as that host, i.e. it forwards the traffic to
  the intended destination, but makes it look like it came from the
  firewall box itself. It works both ways: if the outside host
  answers, the firewall will silently forward the traffic to the
  corresponding local computer. This way, the computers on your local
  net are completely invisible to the outside world, even though they
  can reach the outside and can be reached. This makes it possible to
  have the computers on the local network participate on the Internet
  even if they don't have officially registered IP addresses.  (This
  last problem can also be solved by connecting the Linux box to the
  Internet using SLiRP [SLiRP is a SLIP/PPP emulator that works if you
  have a regular dial up shell account on some UNIX computer; get it
  from ftp://sunsite.unc.edu/pub/Linux/system/Network/serial/].)
  Details on how to set things up are contained in the IP Masquerading
  FAQ, available at http://www.indyramp.com/masq/
  To use masquerading you must also enable Network Firewalls, IP
  forwarding/gatewaying, IP firewalling and (ideally, but optionally)
  IP always defragment.
  If you want this, say Y.

IP: MS PPTP masq support (EXPERIMENTAL)
CONFIG_IP_MASQUERADE_PPTP
  Support for masquerading of the GRE data channel portion of the PPTP
  Virtual Private Network protocol.
  If you are masquerading a PPTP client or server you need to enable
  this in addition to regular IP Masquerade.
  See http://www.wolfenet.com/~jhardin/ip_masq_pptp.html for more details.

IP: MS PPTP Call ID masq support (EXPERIMENTAL)
CONFIG_IP_MASQUERADE_PPTP_MULTICLIENT
  Enabling this adds code to masquerade PPTP Call IDs, which allows
  more than one masqueraded client to access the same server.
  This only needs to be enabled if you are masquerading more than one
  client, and if those clients will try to access the same PPTP server
  at the same time.
  You do NOT need to enable this if you are masquerading a PPTP
  server, regardless of how many clients will be accessing it.

IP: MS PPTP masq debugging
DEBUG_IP_MASQUERADE_PPTP
  Enables PPTP Masquerade debugging messages. This should be disabled
  for normal use once you have PPTP masq working, as it will cause
  your system logs to quickly grow rather large. Enable verbose
  debugging for more detailed information.

IP: IPSEC ESP & ISAKMP masq support (EXPERIMENTAL)
CONFIG_IP_MASQUERADE_IPSEC
  Support for limited masquerading of the IPSEC ESP network encryption
  and ISAKMP key-exchange protocols.
  If you are masquerading an IPSEC client you need to enable this in
  addition to regular IP Masquerade.
  Note that this may not successfully masquerade all types of
  IPSEC-based encryption, as some options in the protocol offer a
  cryptographic checksum across the IP addresses, which prevents the
  masqueraded packets from being accepted.

IP: IPSEC masq table lifetime (minutes)
CONFIG_IP_MASQUERADE_IPSEC_EXPIRE
  After a period of inactivity IPSEC masq table entries expire and are
  removed. When this happens inbound traffic can no longer be routed
  to the masqueraded host until new outbound traffic creates a new
  masq table entry.
  For greatest reliability, your IPSEC rekey interval should be less
  than the table entry lifetime. If your rekey interval is greater
  than thirty minutes you will improve security by reducing it to
  thirty minutes. If you don't want to do that, then increase the masq
  table entry lifetime. Note that doing this will increase the clutter
  in the IPSEC masq table, as old table entries will persist for this
  many minutes after a rekey.
  The minimum lifetime is 15 minutes. Decreasing the lifetime will
  interfere with sessions that are idle for long periods of time.

IP: IPSEC masq debugging
DEBUG_IP_MASQUERADE_IPSEC
  Enables IPSEC Masquerade debugging messages. This should be disabled
  for normal use once you have IPSEC masq working, as it will cause
  your system logs to quickly grow rather large. Enable verbose
  debugging for more detailed information.

IP: ipautofw masquerading (EXPERIMENTAL)
CONFIG_IP_MASQUERADE_IPAUTOFW
  Richard Lynch's ipautofw allows masquerading to work with protocols
  which do not (as yet) have specific protocol helpers.  Its source,
  and other information, is available at
  ftp://ftp.netis.com/pub/members/rlynch/.

IP: ICMP masquerading
CONFIG_IP_MASQUERADE_ICMP
  The basic masquerade code described for CONFIG_IP_MASQUERADE only
  handles TCP or UDP packets (and ICMP errors for existing
  connections).  This option adds additional support for masquerading
  ICMP packets, such as ping or the probes used by the Windows 95
  tracert program.
  If you want this, say Y.

IP: always defragment
CONFIG_IP_ALWAYS_DEFRAG
  This option means that all incoming fragments ( = parts of IP
  packets that arose when some host between origin and destination
  decided that the IP packets were too large and cut them in pieces)
  will be reassembled (defragmented) before being processed, even if
  they are about to be forwarded.  This option is highly recommended
  if you have enabled the masquerading support (CONFIG_IP_MASQUERADE),
  because this facility requires that second and further fragments can
  be related to TCP or UDP port numbers, which are only stored in the
  first fragment. When using IP firewall support (CONFIG_IP_FIREWALL),
  you might also want to enable this option, to have a more reliable
  firewall (otherwise second and further fragments will always be
  accepted by the firewall).  When using transparent proxying
  (CONFIG_IP_TRANSPARENT_PROXY), this option is implicit, although it
  is safe to say N here.  Do not say Y to this option except when
  running either a firewall that is the sole link to your network or
  a transparent proxy.
  Never ever say Y to this for a normal router or host.

IP: aliasing support
CONFIG_IP_ALIAS
  Sometimes it is useful to give several addresses to a single network
  interface ( = serial port or Ethernet card).  The most common case
  is that you want to serve different WWW documents to the outside
  according to which of your host names they used to connect to you.
  This is explained in detail on the WWW at
  http://www.thesphere.com/~dlp/TwoServers/ (to browse the WWW, you
  need to have access to a machine on the Internet that has one of the
  programs lynx, netscape or Mosaic).  Another scenario would be that
  there are two logical networks living on your local Ethernet and you
  want to access them both with the same Ethernet card.  The
  configuration of these alias addresses is done with a special name
  syntax explained in Documentation/networking/alias.txt.  If you want
  this, say Y. Most people don't need it and say N.

IP: multicast routing (EXPERIMENTAL)
CONFIG_IP_MROUTE
  This is used if you want your machine to act as a router for IP
  packets that have several destination addresses. It is needed on the
  MBONE, a high bandwidth network on top of the Internet which carries
  audio and video broadcasts. In order to do that, you would most
  likely run the program mrouted. Information about the multicast
  capabilities of the various network cards is contained in
  drivers/net/README.multicast. If you haven't heard about it, you
  don't need it.

PC/TCP compatibility mode
CONFIG_INET_PCTCP
  If you have been having difficulties telnetting to your Linux
  machine from a DOS system that uses (broken) PC/TCP networking
  software (all versions up to OnNet 2.0) over your local Ethernet try
  enabling this option.  Everyone else says N.
  People having problems with NCSA telnet should see the file
  linux/Documentation/networking/ncsa-telnet.

Reverse ARP
CONFIG_INET_RARP
  Since you asked: if there are (usually diskless or portable)
  machines on your local network that know their hardware Ethernet
  addresses but don't know their IP addresses upon startup, they can
  send out a Reverse Address Resolution Protocol (RARP) request to
  find out their own IP addresses. Diskless Sun 3 machines use this
  procedure at boot time. If you want your Linux box to be able to
  *answer* such requests, say Y here; you'd have to run the program
  rarp ("man rarp") on your box. If you actually want to use a
  diskless Sun 3 machine as an Xterminal to Linux, say Y here and
  fetch Linux-Xkernel from
  ftp://sunsite.unc.edu/pub/Linux/system/Network/boot.net/.  Superior
  solutions to the problem of booting and configuring machines over a
  net connection are given by the protocol BOOTP and its successor
  DHCP. See the DHCP FAQ
  http://web.syr.edu/~jmwobus/comfaqs/dhcp.faq.html for details.  If
  you want to compile RARP support as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt.  If you don't
  understand a word of the above, say N and rest in peace.

Assume subnets are local
CONFIG_INET_SNARL
  Say Y if you are on a subnetted network with all machines connected
  by Ethernet segments only, as this option optimizes network access
  for this special case.  If there are other connections, e.g. SLIP
  links, between machines of your IP network, say N.  If in doubt,
  say N. The PATH mtu discovery facility will cover most cases anyway.

Disable Path MTU Discovery (normally enabled)
CONFIG_NO_PATH_MTU_DISCOVERY
  MTU (maximal transfer unit) is the size of the chunks we send out
  over the net.  "Path MTU Discovery" means that, instead of always
  sending very small chunks, we start out sending big ones and if we
  then discover that some host along the way likes its chunks smaller,
  we adjust to a smaller size.  This is good, so most people say N.
  However, some versions of DOS NCSA telnet (and other software) are
  broken and can only connect to your Linux machine if you say Y here.
  See also Documentation/networking/ncsa-telnet for the location of
  fixed NCSA telnet clients.

Disable NAGLE algorithm (normally enabled)
CONFIG_TCP_NAGLE_OFF
  The NAGLE algorithm works by requiring an acknowledgment before
  sending small IP frames ( = packets).  This keeps tiny telnet and
  rlogin packets from congesting Wide Area Networks.  Most people
  strongly recommend to say N here, thereby leaving NAGLE enabled.
  Those programs that would benefit from disabling this facility can
  do it on a per connection basis themselves.

IP: Drop source routed frames
CONFIG_IP_NOSR
  Usually, the originator of an IP frame ( = packet) specifies only
  the destination, and the hosts along the way do the routing, i.e.
  they decide how to forward the frame.  However, there is a feature
  of the IP protocol that allows to specify the full route for a given
  frame already at its origin. A frame with such a fully specified
  route is called "source routed".  The question now is whether we
  should honour these route requests when such frames arrive, or if
  we should drop all those frames instead.  Honouring them can
  introduce security problems (and is rarely a useful feature), and
  hence it is recommended that you say Y here unless you really know
  what you're doing.

IP: Allow large windows (not recommend if <16MB of memory)
CONFIG_SKB_LARGE
  On high speed, long distance networks the performance limit on
  networking becomes the amount of data a machine can buffer until the
  other end confirms its reception.  (At 45Mbit/second there are a lot
  of bits between New York and London...)  This option allows larger
  amounts of data to be "in flight" at a given time.  It also means a
  user process can require a lot more memory for network buffers and
  thus this option is best only used on machines with 16MB of
  memory or higher.
  Unless you are using long links with end to end speeds of over 2Mbit
  a second or satellite links this option will make no difference to
  performance.

The IPX protocol
CONFIG_IPX
  This is support for the Novell networking protocol, IPX, commonly
  used for local networks of Windows machines. You need it if you want
  to access Novell NetWare file or print servers using the Linux
  Novell client ncpfs (available via FTP (user: anonymous) from
  sunsite.unc.edu:/pub/Linux/system/Filesystems/) or from within the
  Linux DOS emulator dosemu (read the DOSEMU-HOWTO, available in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO). In order to do the former,
  you'll also have to say Y to "NCP filesystem support", below. To
  turn your Linux box into a fully featured NetWare file server and
  IPX router, say Y here and fetch either lwared from
  sunsite.unc.edu:/pub/Linux/system/Network/daemons/ or mars_nwe from
  ftp.gwdg.de:/pub/linux/misc/ncpfs. For more information, read the
  IPX-HOWTO in sunsite.unc.edu:/pub/Linux/docs/howto. The IPX driver
  would enlarge your kernel by about 5 kB. This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.
  Unless you want to integrate your Linux box with a local Novell
  network, say N.

Full internal IPX network
CONFIG_IPX_INTERN
  The full internal IPX network enables you to allocate sockets on
  different virtual nodes of the internal network.  This is done by
  evaluating the field sipx_node of the socket address given to the
  bind call.  So applications should always initialize the node field
  to 0 when binding a socket on the primary network.  In this case the
  socket is assigned the default node that has been given to the
  kernel when the internal network was created.  By enabling the full
  internal IPX network the cross-forwarding of packets targeted at
  'special' sockets to sockets listening on the primary network is
  disabled.  This might break existing applications, especially
  RIP/SAP daemons.  A RIP/SAP daemon that works well with the full
  internal net can be found on ftp.gwdg.de:/pub/linux/misc/ncpfs.
  If you don't know what you are doing, say N.

AppleTalk DDP
CONFIG_ATALK
  AppleTalk is the way Apple computers speak to each other on a
  network.  EtherTalk is the name used for AppleTalk over Ethernet
  and LocalTalk is AppleTalk over the Apple serial links.  If your
  Linux box is connected to such a network and you want to join the
  conversation, say Y.  You will need to use the netatalk package
  so that your Linux box can act as a print and file server for
  macs as well as access AppleTalk printers.  Check out
  http://artoo.hitchcock.org/~flowerpt/projects/linux-netatalk/ on
  the WWW for details (to browse the WWW, you need to have access to
  a machine on the Internet that has one of the programs lynx,
  netscape or Mosaic).  The NET-2-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO contains
  valuable information as well.  This driver is also available as a
  module ( = code which can be inserted in and removed from the
  running kernel whenever you want).  If you want to compile it as a
  module, say M here and read Documentation/modules.txt.  I hear that
  the GNU boycott of Apple is over, so even politically correct people
  are allowed to say Y here.  At the time the kernel is released the
  localtalk drivers are not yet ready to ship.  The kernel however
  supports localtalk and when such drivers become available all you
  will need to do is download and install the localtalk driver.

Amateur Radio AX.25 Level 2
CONFIG_AX25
  This is the protocol used for computer communication over amateur
  radio. It is either used by itself for point-to-point links, or to
  carry other protocols such as TCP/IP. To use it, you need a device
  that connects your Linux box to your amateur radio. You can either
  use a low speed TNC (a Terminal Node Controller acts as a kind of
  modem connecting your computer's serial port to your radio's
  microphone input and speaker output) supporting the KISS protocol or
  the various SCC cards that are supported by the Ottawa PI, the
  Gracilis Packetwin and the generic Z8530 driver. Another option are
  the Baycom modem serial and parallel port hacks (supported by their
  own driver) and the other baycom cards (SCC) (supported by the Z8530
  driver).  Information about where to get supporting software for
  Linux amateur radio as well as information about how to configure an
  AX.25 port is contained in the HAM-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO. You might also
  want to check out the file Documentation/networking/ax25.txt in the
  kernel source. More information about digital amateur radio in
  general is on the WWW at http://www.cis.ohio-state.edu/
  /hypertext/faq/usenet/radio/ham-radio/digital-faq/faq.html
  (To browse the WWW, you need to have access to a machine on the
  Internet that has one of the programs lynx, netscape or Mosaic).

Amateur Radio NET/ROM
CONFIG_NETROM
  NET/ROM is a network layer protocol on top of AX.25 useful for
  routing.  A comprehensive listing of all the software for Linux
  amateur radio users as well as information about how to configure an
  AX.25 port is contained in the HAM-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.  You also might
  also want to check out the file Documentation/networking/ax25.txt.
  More information about digital amateur radio in general is on the
  WWW at http://www.cis.ohio-state.edu
  /hypertext/faq/usenet/radio/ham-radio/digital-faq/faq.html
  (To browse the WWW, you need to have access to a machine on the
  Internet that has one of the programs lynx, netscape or Mosaic).

AX.25 over Ethernet
CONFIG_BPQETHER
  AX.25 is the protocol used for computer communication over amateur
  radio. If you say Y here, you will be able to send and receive AX.25
  traffic over Ethernet (also called "BPQ AX.25"), which could be
  useful if some other computer on your local network has a direct
  amateur radio connection.

Bridging (EXPERIMENTAL)
CONFIG_BRIDGE
  If you say Y here, then your Linux box will be able to act as an
  Ethernet bridge, which means that the different Ethernet segments it
  is connected to will appear as one Ethernet to the participants.
  Several such bridges can work together to create even larger
  networks of Ethernets using the IEEE802.1 spanning tree algorithm.
  As this is a standard, Linux bridges will interwork properly with
  other third party bridge products. In order to use this, you'll need
  the bridge configuration tools available via FTP (user: anonymous)
  from shadow.cabi.net. Note that if your box acts as a bridge, it
  probably contains several Ethernet devices, but the kernel is not
  able to recognize more than one at boot time without help; for
  details read the Multiple-Ethernet-mini-HOWTO, available via FTP
  (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.
  The Bridging code is still in test. If unsure, say N.

Kernel/User network link driver (EXPERIMENTAL)
CONFIG_NETLINK
  This driver allows for two-way communication between certain parts
  of the kernel or modules and user processes; the user processes are
  able to read from and write to character special files in the /dev
  directory having major mode 36.  So far, the kernel uses it to
  publish some network related information if you enable "Routing
  messages", below.  Say Y if you want to experiment with it; this is
  EXPERIMENTAL code, which means that it need not be completely
  stable.  You need to include this if you want to use arpd, a daemon
  that helps keep the internal ARP cache (a mapping between IP
  addresses and hardware addresses on the local network) small.
  If unsure, say N.

Routing messages
CONFIG_RTNETLINK
  If you enable this and create a character special file /dev/route
  with major number 36 and minor number 0 using mknod ("man mknod"),
  you can read some network related routing information from that
  file. Everything you write to that file will be discarded.

SCSI support?
CONFIG_SCSI
  If you want to use a SCSI hard disk, SCSI tapedrive, SCSI CDROM or
  any other SCSI device under Linux, say Y and make sure that you know
  the name of your SCSI host adapter (the card inside your computer
  that "speaks" the SCSI protocol), because you will be asked for it.
  You also need to say Y here if you want support for the parallel
  port version of the 100MB IOMEGA ZIP drive.  Please read the
  SCSI-HOWTO, available via FTP (user: anonymous) in sunsite.unc.edu:
  /pub/Linux/docs/HOWTO.  This driver is also available as a module
  ( = code which can be inserted in and removed from the running
  kernel whenever you want).  If you want to compile it as a module,
  say M here and read Documentation/modules.txt and
  Documentation/scsi.txt.

SCSI disk support
CONFIG_BLK_DEV_SD
  If you want to use a SCSI hard disk or the SCSI or parallel port
  version of the IOMEGA ZIP drive under Linux, say Y and read the
  SCSI-HOWTO, available via FTP (user: anonymous) in sunsite.unc.edu:
  /pub/Linux/docs/HOWTO. This is NOT for SCSI CDROMs.
  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  If you want to compile it as a module, say M here and read
  Documentation/modules.txt and Documentation/scsi.txt.

SCSI tape support
CONFIG_CHR_DEV_ST
  If you want to use a SCSI tapedrive under Linux, say Y and read the
  SCSI-HOWTO, available via FTP (user: anonymous) in sunsite.unc.edu:
  /pub/Linux/docs/HOWTO and drivers/scsi/README.st in the kernel
  source. This is NOT for SCSI CDROMs. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt and
  Documentation/scsi.txt.

SCSI CDROM support
CONFIG_BLK_DEV_SR
  If you want to use a SCSI CDROM under Linux, say Y and read the
  SCSI-HOWTO and the CDROM-HOWTO from sunsite.unc.edu:
  /pub/Linux/docs/HOWTO. Also make sure to enable the ISO9660
  filesystem later. This driver is also available as a module ( = code
  which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read Documentation/modules.txt and Documentation/scsi.txt.

SCSI generic support
CONFIG_CHR_DEV_SG
  If you want to use SCSI scanners, synthesizers or CD-writers or just
  about anything having "SCSI" in its name other than hard disks,
  CDROMs or tapes, say Y here. Those won't be supported by the kernel
  directly, so you need some additional software which knows how to
  talk to these devices using the SCSI protocol. For CD-writers, you
  would need the program cdwrite, available via FTP (user: anonymous)
  from sunsite.unc.edu:/pub/Linux/utils/disk-management; for other
  devices, it's possible that you'll have to write the driver software
  yourself, so have a look at the SCSI-HOWTO and at the
  SCSI-Programming-HOWTO, both available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt and Documentation/scsi.txt.

Probe all LUNs on each SCSI device
CONFIG_SCSI_MULTI_LUN
  If you have a SCSI device that supports more than one LUN (Logical
  Unit Number), e.g. a CD jukebox, and only one LUN is detected, you
  can say Y here to force the SCSI driver to probe for multiple LUNs.
  A SCSI device with multiple LUNs acts logically like multiple SCSI
  devices.  The vast majority of SCSI devices have only one LUN, and
  so most people can say N here and should in fact do so, because it
  is safer.

Verbose SCSI error reporting (kernel size +=12K)
CONFIG_SCSI_CONSTANTS
  The error messages regarding your SCSI hardware will be easier to
  understand if you enable this; it will enlarge your kernel by about
  12KB.  If in doubt, say Y.

AdvanSys SCSI support
CONFIG_SCSI_ADVANSYS
  This is a driver for all SCSI host adapters manufactured by
  AdvanSys. It is documented in the kernel source in
  drivers/scsi/advansys.c. This driver is also available as a module
  ( = code which can be inserted in and removed from the running
  kernel whenever you want). If you want to compile it as a module,
  say M here and read Documentation/modules.txt.

Adaptec AHA152X/2825 support
CONFIG_SCSI_AHA152X
  This is support for the AHA-1510, AHA-1520, AHA-1522, and AHA-2825
  SCSI host adapters. It is explained in section 3.3 of the
  SCSI-HOWTO, available via FTP (user: anonymous) at sunsite.unc.edu:
  /pub/Linux/docs/HOWTO. You might also want to read the comments at
  the top of drivers/scsi/aha152x.c. This driver is also available as
  a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt.

Adaptec AHA1542 support
CONFIG_SCSI_AHA1542
  This is support for a SCSI host adapter. It is explained in section
  3.4 of the SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  Note that Trantor was
  recently purchased by Adaptec, and some former Trantor products are
  being sold under the Adaptec name.  If it doesn't work out of the
  box, you may have to change some settings in drivers/scsi/aha1542.h.
  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt.

Adaptec AHA1740 support
CONFIG_SCSI_AHA1740
  This is support for a SCSI host adapter.  It is explained in
  section 3.5 of the SCSI-HOWTO, available via FTP (user: anonymous)
  at sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If it doesn't work out
  of the box, you may have to change some settings in
  drivers/scsi/aha1740.h. This driver is also available as a module
  ( = code which can be inserted in and removed from the running
  kernel whenever you want). If you want to compile it as a module,
  say M here and read Documentation/modules.txt.

Adaptec AIC7xxx chipset SCSI controller support
CONFIG_SCSI_AIC7XXX
  This is support for the various aic7xxx based Adaptec SCSI
  controllers. These include the 274x EISA cards; 284x VLB cards; 2902,
  2910, 293x, 294x, 394x, 3985 and several other PCI and motherboard based
  SCSI controllers from Adaptec.  It does not support the AAA-13x RAID
  controllers from Adaptec, nor will it likely ever support them.  It
  does not support the 2920 cards from Adaptec that use the Future Domain
  SCSI controller chip.  For those cards, you need the "Future Domain
  16xx SCSI support" driver.

  In general, if the controller is based on an Adaptec SCSI controller
  chip from the aic777x series or the aic78xx series, it should work.  The
  only exception is the 7810 which is specifically not supported (that's the
  RAID controller chip on the AAA-13x cards).

  Information on the configuration options for this controller can be
  found by checking the help file for each of the available
  configuration options. You should read drivers/scsi/README.aic7xxx
  at a minimum before contacting the maintainer with any questions.  
  The SCSI-HOWTO, available via FTP (user: anonymous) at
  ftp://metalab.unc.edu/pub/Linux/docs/HOWTO can also be of great help.

  If you want to compile this driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt. The module will be
  called aic7xxx.o.

Enable or Disable Tagged Command Queueing by default
CONFIG_AIC7XXX_TCQ_ON_BY_DEFAULT
  This option causes the aic7xxx driver to attempt to use tagged command
  queueing on any devices that claim to support it.  If this is set to yes,
  you can still turn off TCQ on troublesome devices with the use of the
  tag_info boot parameter.  See /usr/src/linux/drivers/scsi/README.aic7xxx
  for more information on that and other aic7xxx setup commands.  If this
  option is turned off, you may still enable TCQ on known good devices by
  use of the tag_info boot parameter.
  
  If you are unsure about your devices then it is safest to say N here.
  
  However, TCQ can increase performance on some hard drives by as much
  as 50% or more, so I would recommend that if you say N here, that you
  at least read the README.aic7xxx file so you will know how to enable
  this option manually should your drives prove to be safe in regards
  to TCQ.

  Conversely, certain drives are known to lock up or cause bus resets when
  TCQ is enabled on them.  If you have a Western Digital Enterprise SCSI
  drive for instance, then don't even bother to enable TCQ on it as the
  drive will become unreliable, and it will actually reduce performance.

Default number of TCQ commands per device
CONFIG_AIC7XXX_CMDS_PER_DEVICE
  Specify the number of commands you would like to allocate per SCSI
  device when Tagged Command Queueing (TCQ) is enabled on that device.

  Reasonable figures are in the range of 8 to 24 commands per device,
  but depending on hardware could be increased or decreased from that
  figure. If the number is too high for any particular device, the
  driver will automatically compensate usually after only 10 minutes
  of uptime. It will not hinder performance if some of your devices
  eventually have their command depth reduced, but is a waste of memory
  if all of your devices end up reducing this number down to a more
  reasonable figure.
  
  NOTE: Certain very broken drives are known to lock up when given more
  commands than they like to deal with.  Quantum Fireball drives are the
  most common in this category.  For the Quantum Fireball drives I would
  suggest no more than 8 commands per device.

  Default: 8

Collect statistics to report in /proc
CONFIG_AIC7XXX_PROC_STATS
  This option tells the driver to keep track of how many commands have
  been sent to each particular device and report that information to
  the user via the /proc/scsi/aic7xxx/n file, where n is the number of
  the aic7xxx controller you want the information on. This adds a
  small amount of overhead to each and every SCSI command the aic7xxx
  driver handles, so if you aren't really interested in this
  information, it is best to leave it disabled. This will only work if
  you also say Y to "/proc filesystem support", below. 

  If unsure, say N.

Delay in seconds after SCSI bus reset
CONFIG_AIC7XXX_RESET_DELAY
  This sets how long the driver will wait after resetting the SCSI bus
  before attempting to communicate with the devices on the SCSI bus
  again. This delay will be used during the reset phase at bootup time
  as well as after any reset that might occur during normal operation.
  Reasonable numbers range anywhere from 5 to 15 seconds depending on
  your devices. DAT tape drives are notorious for needing more time
  after a bus reset to be ready for the next command, but most hard
  drives and CD-ROM devices are ready in only a few seconds. This
  option has a maximum upper limit of 20 seconds to avoid bad
  interactions between the aic7xxx driver and the rest of the linux
  kernel. The default value has been reduced to 5 seconds. If this
  doesn't work with your hardware, try increasing this value.

BusLogic SCSI support
CONFIG_SCSI_BUSLOGIC
  This is support for BusLogic MultiMaster and FlashPoint SCSI Host
  Adapters.  Consult the SCSI-HOWTO, available via anonymous FTP from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO, and the files README.BusLogic
  and README.FlashPoint in drivers/scsi for more information.  If this
  driver does not work correctly without modification, please contact
  the author, Leonard N. Zubkoff, by email to lnz@dandelion.com.
  You can also build this driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  but only a single instance may be loaded.  If you want to compile it
  as a module, say M here and read Documentation/modules.txt.

Omit BusLogic SCSI FlashPoint support
CONFIG_SCSI_OMIT_FLASHPOINT
  This option allows you to omit the FlashPoint support from the
  BusLogic SCSI driver.  The FlashPoint SCCB Manager code is
  substantial, so users of MultiMaster Host Adapters may wish to
  omit it.

DTC3180/3280 SCSI support
CONFIG_SCSI_DTC3280
  This is support for DTC 3180/3280 SCSI Host Adapters.  Please read
  the SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO and the file
  drivers/scsi/README.dtc3x80.  This driver is also available as a
  module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt.

EATA-DMA (DPT, NEC, AT&T, SNI, AST, Olivetti, Alphatronix) support
CONFIG_SCSI_EATA_DMA
  This is support for the EATA-DMA protocol compliant SCSI Host
  Adapters like the SmartCache III/IV, SmartRAID controller families
  and the DPT PM2011B and PM2012B controllers.  Please read the
  SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

EATA-PIO (old DPT PM2001, PM2012A) support
CONFIG_SCSI_EATA_PIO
  This driver supports all EATA-PIO protocol compliant SCSI Host
  Adapters like the DPT PM2001 and the PM2012A. EATA-DMA compliant
  host adapters could also use this driver but are discouraged from
  doing so, since this driver only supports hard disks and lacks
  numerous features.  You might want to have a look at the SCSI-HOWTO,
  available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt.

UltraStor 14F/34F support
CONFIG_SCSI_U14_34F
  This is support for the UltraStor 14F and 34F SCSI-2 host adapters.
  The source at drivers/scsi/u14-34f.c contains some information about
  this hardware.  If the driver doesn't work out of the box, you may
  have to change some settings in drivers/scsi/u14-34f.c.
  Read the SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  Note that there is also
  another driver for the same hardware: "UltraStor SCSI support",
  below.  You should enable both only if you want 24F support as well.
  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  If you want to compile it as a module, say M here and read
  Documentation/modules.txt.

Future Domain 16xx SCSI support
CONFIG_SCSI_FUTURE_DOMAIN
  This is support for Future Domain's 16-bit SCSI host adapters
  (TMC-1660/1680, TMC-1650/1670, TMC-3260, TMC-1610M/MER/MEX)
  and other adapters based on the Future Domain chipsets (Quantum
  ISA-200S, ISA-250MG; Adaptec AHA-2920; and at least one IBM board).
  It is explained in section 3.7 of the SCSI-HOWTO, available via FTP
  (user: anonymous) at sunsite.unc.edu:/pub/Linux/docs/HOWTO.
  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  If you want to compile it as a module, say M here and read
  Documentation/modules.txt.

Generic NCR5380/53c400 SCSI support
CONFIG_SCSI_GENERIC_NCR5380
  This is the generic NCR family of SCSI controllers, not to be
  confused with the NCR 53c7 or 8xx controllers. It is explained in
  section 3.8 of the SCSI-HOWTO, available via FTP (user: anonymous)
  at sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If it doesn't work out of
  the box, you may have to change some settings in
  drivers/scsi/g_NCR5380.h. This driver is also available as a module
  ( = code which can be inserted in and removed from the running
  kernel whenever you want). If you want to compile it as a module,
  say M here and read Documentation/modules.txt.

Enable NCR53c400 extensions
CONFIG_SCSI_GENERIC_NCR53C400
  This enables certain optimizations for the NCR53c400 SCSI cards. You
  might as well try it out. Note that this driver will only probe for
  the Trantor T130B in its default configuration; you might have to
  pass a command line option to the kernel at boot time if it doesn't
  detect your card. See the file drivers/scsi/README.g_NCR5380 for
  details. If you want to compile it as a module, say M here and read
  Documentation/modules.txt.

NCR5380/53c400 mapping method (use Port for T130B)
CONFIG_SCSI_G_NCR5380_PORT
  The NCR5380 and NCR53c400 SCSI controllers come in two varieties:
  port or memory mapped. You should know what you have. The most
  common card, Trantor T130B, uses port mapped mode.

NCR53c7,8xx SCSI support
CONFIG_SCSI_NCR53C7xx
  This is the 53c7 and 8xx NCR family of SCSI controllers, not to be
  confused with the NCR 5380 controllers. It is explained in section
  3.8 of the SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If it doesn't work out of the
  box, you may have to change some settings in
  drivers/scsi/53c7,8xx.h. This driver is also available as a module
  ( = code which can be inserted in and removed from the running
  kernel whenever you want). If you want to compile it as a module,
  say M here and read Documentation/modules.txt.

Always negotiate synchronous transfers
CONFIG_SCSI_NCR53C7xx_sync
  In general, this is good; however, it is a bit dangerous since there
  are some broken SCSI devices out there. Take your chances. Safe bet
  is N.

Allow FAST-SCSI [10MHz]
CONFIG_SCSI_NCR53C7xx_FAST
  This will enable 10MHz FAST-SCSI transfers with your host adapter.
  Some systems have problems with that speed, so it's safest to say N
  here.

Allow DISCONNECT
CONFIG_SCSI_NCR53C7xx_DISCONNECT
  This enables the disconnect/reconnect feature of the NCR SCSI
  controller.  When this is enabled, a slow SCSI device will not lock
  the SCSI bus while processing a request, allowing simultaneous use
  of e.g. a SCSI hard disk and SCSI tape or CD-ROM drive, and
  providing much better performance when using slow and fast SCSI
  devices at the same time. Some devices, however, do not operate
  properly with this option enabled, and will cause your SCSI system
  to hang, which might cause a system crash.  The safe answer
  therefore is to say N.

NCR53C8XX SCSI support
CONFIG_SCSI_NCR53C8XX
  This is the BSD ncr driver adapted to Linux for the NCR53C8XX family
  of PCI-SCSI controllers. This driver supports parity checking,
  tagged command queuing and fast synchronous data transfers up to 80
  MB/s with wide FAST-40 LVD devices and controllers.
  The NCR53C860 and NCR53C875 support FAST-20 transfers. The NCR53C895
  supports FAST-40 transfers with Ultra2 LVD devices.
  If you have a SYM53C896 PCI-SCSI controller, you may want to use the new 
  improved driver available at ftp://ftp.tux.org/pub/roudier/896/.
  Please read drivers/scsi/README.ncr53c8xx for more information.
  
Synchronous data transfers frequency
CONFIG_SCSI_NCR53C8XX_SYNC
  The SCSI Parallel Interface-2 Standard defines 4 classes of transfer
  rates: FAST-5, FAST-10, FAST-20 and FAST-40. The numbers are
  respectively the maximum data transfer rates in mega-transfers per
  second for each class. For example, a FAST-20 Wide 16 device is able
  to transfer data at 20 million 16 bit packets per second for a total
  rate of 40 MB/s.
  You may specify 0 if you want to only use asynchronous data
  transfers. This is the safest and slowest option. Otherwise, specify
  a value between 5 and 40, depending on the capability of your SCSI
  controller. The higher the number, the faster the data transfer.
  Note that 40 should normally be ok since the driver decreases the
  value automatically according to the controller's capabilities.
  Your answer to this question is ignored for controllers with NVRAM,
  since the driver will get this information from the user set-up. It
  also can be overridden using a boot setup option, as follows
  (example): 'ncr53c8xx=sync:12' will allow the driver to negotiate
  for FAST-20 synchronous data transfer (20 mega-transfers per
  second).
  The normal answer therefore is not to go with the default but to
  select the maximum value 40 allowing the driver to use the maximum
  value supported by each controller. If this causes problems with
  your SCSI devices, you should come back and decrease the value.
  There is no safe option other than using good cabling, right
  terminations and SCSI conformant devices.

Use normal IO
CONFIG_SCSI_NCR53C8XX_IOMAPPED
  If you say Y here, the driver will use normal IO, as opposed to
  memory mapped IO. Memory mapped IO has less latency than normal IO
  and works for most Intel-based hardware. Under Linux/Alpha only
  normal IO is currently supported by the driver and so, this option
  has no effect on those systems. 
  The normal answer therefore is N; try Y only if you encounter SCSI
  related problems.

Not allow targets to disconnect
CONFIG_SCSI_NCR53C8XX_NO_DISCONNECT
  This option is only provided for safety if you suspect some SCSI
  device of yours to not support properly the target-disconnect
  feature. In that case, you would say Y here. In general however, to
  not allow targets to disconnect is not reasonable if there is more
  than 1 device on a SCSI bus. The normal answer therefore is N.

Default tagged command queue depth
CONFIG_SCSI_NCR53C8XX_DEFAULT_TAGS
  "Tagged command queuing" is a feature of SCSI-2 which improves
  performance: the host adapter can send several SCSI commands to a
  device's queue even if previous commands haven't finished yet. Some
  SCSI devices don't implement this properly; if you want to disable
  this feature, enter 0 or 1 here (it doesn't matter which).
  The default value is 8 and should be supported by most hard disks.
  This value can be overridden from the boot command line using the 
  'tags' option as follows (example):
  'ncr53c8xx=tags:4/t2t3q16/t0u2q10' will set default queue depth to
  4, set queue depth to 16 for target 2 and target 3 on controller 0
  and set queue depth to 10 for target 0 / lun 2 on controller 1.
  The normal answer therefore is to go with the default 8 and to use 
  a boot command line option for devices that need to use a different 
  command queue depth.
  There is no safe option other than using good SCSI devices.

Maximum number of queued commands
CONFIG_SCSI_NCR53C8XX_MAX_TAGS
  This option allows you to specify the maximum number of commands
  that can be queued to any device, when tagged command queuing is
  possible. The default value is 32. Minimum is 2, maximum is 64.
  Modern hard disks are able to support 64 tags and even more, but 
  donnot seem to be faster when more than 32 tags are being used.
  So, the normal answer here is to go with the default value 32 unless
  you are using very large hard disks with large cache (>= 1 MB) that
  are able to take advantage of more than 32 tagged commands.
  There is no safe option and the default answer is recommended.

Assume boards are SYMBIOS compatible
CONFIG_SCSI_NCR53C8XX_SYMBIOS_COMPAT
  This option allows you to enable some features depending on GPIO
  wiring. These General Purpose Input/Output pins can be used for
  vendor specific features or implementation of the standard SYMBIOS
  features. Genuine SYMBIOS controllers use GPIO0 in output for
  controller LED and GPIO3 bit as a flag indicating
  singled-ended/differential interface. The Tekram DC-390U/F boards
  uses a different GPIO wiring.
  Your answer to this question is ignored if all your controllers have
  NVRAM, since the driver is able to detect the board type from the
  NVRAM format.
  If all the controllers in your system are genuine SYMBIOS boards or
  use BIOS and drivers from SYMBIOS, you would want to say Y here,
  otherwise N. N is the safe answer.

Enable profiling statistics gathering
CONFIG_SCSI_NCR53C8XX_PROFILE
  This option allows you to enable profiling information gathering.
  These statistics are not very accurate due to the low frequency 
  of the kernel clock (100 Hz on i386) and have performance impact 
  on systems that use very fast devices.
  The normal answer therefore is N.

Always IN2000 SCSI support
CONFIG_SCSI_IN2000
  This is support for an ISA bus SCSI host adapter.  You'll find more
  information in drivers/scsi/in2000.readme.  If it doesn't work out
  of the box, you may have to change the jumpers for IRQ or address
  selection.  If you want to compile this as a module ( = code which
  can be inserted in and removed from the running kernel whenever you
  want), say M here and read Documentation/modules.txt.

PAS16 SCSI support
CONFIG_SCSI_PAS16
  This is support for a SCSI host adapter.  It is explained in section
  3.10 of the SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If it doesn't work out of the
  box, you may have to change some settings in drivers/scsi/pas16.h.

Qlogic FAS SCSI support
CONFIG_SCSI_QLOGIC_FAS
  This driver works only with the ISA, VLB, and PCMCIA versions of the
  Qlogic FastSCSI! cards as well as any other card based on the FASXX
  chip (including the Control Concepts SCSI/IDE/SIO/PIO/FDC cards); it
  does NOT support the PCI version.  The PCI versions are supported by
  the Qlogic ISP driver though.  Information about this driver is
  contained in drivers/scsi/README.qlogicfas.  You should also read
  the SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want).  If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

Qlogic ISP SCSI support (EXPERIMENTAL)
CONFIG_SCSI_QLOGIC_ISP
  This driver works for all QLogic PCI SCSI host adapters (IQ-PCI,
  IQ-PCI-10, IQ_PCI-D) except for the PCI-basic card.  (This latter
  card is supported by the "AM53/79C974 PCI SCSI" driver.)  If you
  say Y here, make sure to say Y to "PCI BIOS support" as well.  More
  information is contained in the file drivers/scsi/README.qlogicisp.
  You should also read the SCSI-HOWTO, available via FTP (user:
  anonymous) at sunsite.unc.edu:/pub/Linux/docs/HOWTO.
  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you
  want).  If you want to compile it as a module, say M here and read
  Documentation/modules.txt.

Seagate ST-02 and Future Domain TMC-8xx SCSI support
CONFIG_SCSI_SEAGATE
  These are 8-bit SCSI controllers; the ST-01 is also supported by
  this driver.  It is explained in section 3.9 of the SCSI-HOWTO,
  available via FTP (user: anonymous) at sunsite.unc.edu:
  /pub/Linux/docs/HOWTO.  If it doesn't work out of the box, you may
  have to change some settings in drivers/scsi/seagate.h.
  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you
  want).  If you want to compile it as a module, say M here and read
  Documentation/modules.txt.

Trantor T128/T128F/T228 SCSI support
CONFIG_SCSI_T128
  This is support for a SCSI host adapter.  It is explained in section
  3.11 of the SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If it doesn't work out of the
  box, you may have to change some settings in drivers/scsi/t128.h.
  Note that Trantor was recently purchased by Adaptec, and some former
  Trantor products are being sold under the Adaptec name.

UltraStor SCSI support
CONFIG_SCSI_ULTRASTOR
  This is support for the UltraStor 14F, 24F and 34F SCSI-2 host
  adapter family.  This driver is explained in section 3.12 of the
  SCSI-HOWTO, available via FTP (user: anonymous) at sunsite.unc.edu:
  /pub/Linux/docs/HOWTO.  If it doesn't work out of the box, you may
  have to change some settings in drivers/scsi/ultrastor.h.  If you
  want to compile this as a module ( = code which can be inserted in
  and removed from the running kernel whenever you want), say M here
  and read Documentation/modules.txt.
  Note that there is also another driver for UltraStor hardware:
  "UltraStor 14F/34F support", above.

7000FASST SCSI support
CONFIG_SCSI_7000FASST
  This driver supports the Western Digital 7000 SCSI host adapter.
  Some information is in the source: drivers/scsi/wd7000.c.  This
  driver is also available as a module ( = code which can be inserted
  in and removed from the running kernel whenever you want).  If you
  want to compile it as a module, say M here and read
  Documentation/modules.txt.

EATA ISA/EISA/PCI (DPT and generic EATA/DMA-compliant boards) support
CONFIG_SCSI_EATA
  This driver supports all the EATA/DMA-compliant SCSI host adapters
  and does not need any BIOS32 service.
  DPT ISA and all EISA i/o addresses are probed looking for the "EATA"
  signature.  If "PCI bios support" is enabled, the addresses of all
  the PCI SCSI controllers reported by BIOS32 are probed as well.
  Note that there is also another driver for the same hardware:
  "EATA-DMA support".  You should enable only one of them.
  You want to read the start of drivers/scsi/eata.c and the
  SCSI-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt.

NCR53c406a SCSI support
CONFIG_SCSI_NCR53C406A
  This is support for the NCR53c406a SCSI host adapter.  For user
  configurable parameters, check out drivers/scsi/NCR53c406.c in the
  kernel source.  Also read the SCSI-HOWTO, available via FTP (user:
  anonymous) at sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to
  compile this driver as a module ( = code which can be inserted in
  and removed from the running kernel whenever you want), say M here
  and read Documentation/modules.txt.

Tekram DC390(T) and Am53/79C974 (PCscsi) SCSI support
CONFIG_SCSI_DC390T
  This driver supports  PCI SCSI host adapters  based on the Am53C974A
  chip,  e.g.  Tekram DC390(T),  DawiControl 2974  and  some   onboard
  PCscsi/PCnet (Am53/79C974) solutions.
  Documentation can be found in linux/drivers/scsi/README.tmscsim.
  Note that this driver  does NOT support Tekram DC390W/U/F, which are
  based on NCR/Symbios chips. Use the NCR53C8XX driver for those.
  Also note, that there is another generic Am53C974 driver.
  If you want to compile this driver as a module ( = code which can be
  inserted in and removed from the running kernel  whenever you want),
  say M here  and read Documentation/modules.txt.  The module  will be
  called tmscsim.o.

Skip support for other Am53/79C974 based SCSI adapters
CONFIG_SCSI_DC390T_NOGENSUPP
  Normally, the DC390(T) SCSI driver relies on the DC390 EEPROM to get
  initial values  for its settings,  such as speed,  termination, etc.
  If  it can't find  this EEPROM, it  will use  defaults  or  the user
  supplied boot/module parameters. For details on driver configuration
  see linux/drivers/scsi/README.tmscsim.
  With this option set, if no EEPROM is found, the driver gives up and
  thus only supports  Tekram DC390(T) adapters.  This can be useful if
  you have a DC390(T)  and another Am53C974 based adapter,  which, for
  some reason, you want to drive with the other AM53C974 driver.
  If unsure, say N.

Symbios Logic sym53c416 support
CONFIG_SCSI_SYM53C416
  This is support for the sym53c416 SCSI host adapter. This is the 
  SCSI adapter that comes with some hp scanners. This driver requires that
  the sym53c416 is configured first using some sort of pnp configuration
  program (e.g. isapnp). After doing so it should be loaded as a module
  using insmod. The parameters of the configured card(s) should be passed
  to the driver. The format is:
  
    insmod sym53c416 sym53c416=<base>,<irq> [sym53c416_1=<base>,<irq>]

  There is support for up to four adapters. If you want to compile this
  driver as a module ( = code which can be inserted in and removed from
  the running kernel whenever you want), say M here and read
  Documentation/modules.txt.                                      

AM53/79C974 PCI SCSI support
CONFIG_SCSI_AM53C974
  This is support for the AM53/79C974 SCSI host adapters. Please read
  drivers/scsi/README.AM53C974 for details. Also, the SCSI-HOWTO,
  available via FTP (user: anonymous) at
  ftp://sunsite.unc.edu/pub/Linux/docs/HOWTO, is for you.
  Note that there is another driver for AM53C974 based adapters: The
  Tekram DC390(T) driver.
  If you want to compile this driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),

GDT SCSI Disk Array Controller support
CONFIG_SCSI_GDTH
  This is a driver for all SCSI Disk Array Controllers (EISA/ISA/PCI)
  manufactured by ICP vortex. It is documented in the kernel source in
  drivers/scsi/gdth.c and drivers/scsi/gdth.h. This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

IOMEGA Parallel Port ZIP drive SCSI support
CONFIG_SCSI_PPA
  This driver supports the parallel port version of IOMEGA's ZIP drive
  (a 100Mb removable media device).  For more information about this
  driver and how to use it you should read the file
  drivers/scsi/README.ppa.  You should also read the SCSI-HOWTO, which
  is available via anonymous FTP from sunsite.unc.edu in the directory
  /pub/Linux/docs/HOWTO.  This driver is also available as a module
  which can be inserted in and removed from the running kernel
  whenever you want. If you want to use any two of a parallel port ZIP
  drive, a parallel printer or PLIP on the same parallel port, you
  should compile the drivers as modules and only insert them as
  needed. To compile this driver as a module, say M here and read
  Documentation/modules.txt. Note that you can say N here if you have
  the SCSI version of the ZIP drive: it will be supported
  automatically if you enabled the generic "SCSI disk support", above.

IOMEGA ZIP drive -- Buggy EPP chipset support
CONFIG_SCSI_PPA_HAVE_PEDANTIC
  Contacts with the Iomega driver development team indicate there are
  a few reputably bad EPP implementations in existance. The following
  mainboard chipsets will probably require the PEDANTIC option to
  reliably transfer data:
       Winbond xxx837
       National Semiconductor PC87306 (early revisions)

Initio INI-A100U2W SCSI support
CONFIG_SCSI_INIA100
  This is support for the Initio INI-A100U2W SCSI host adapter.
  Please read the SCSI-HOWTO, available via FTP (user anonymous) at
  ftp://metalab.unc.edu/pub/Linux/docs/HOWTO.

  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documenation/modules.txt. The module will be
  called a100u2w.o

Network device support?
CONFIG_NETDEVICES
  You can say N here in case you don't intend to connect to any other
  computer at all or all your connections will be either via UUCP
  (UUCP is a protocol to forward mail and news between unix hosts over
  telephone lines; read the UUCP-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO) or dialing up a
  shell account or a BBS, even using term (term is a program which
  gives you almost full Internet connectivity if you have a regular
  dial up shell account on some Internet connected Unix computer. Read
  the Term-HOWTO).  You'll have to say Y if your computer contains a
  network card that you want to use under Linux (make sure you know
  its name because you will be asked for it and read the
  Ethernet-HOWTO; also, if you plan to use more than one network card
  under Linux, read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini) or if you want to use
  SLIP (Serial Line Internet Protocol is the protocol used to send
  Internet traffic over telephone lines or nullmodem cables) or CSLIP
  (compressed SLIP) or PPP (better and newer variant of SLIP) or PLIP
  (Parallel Line Internet Protocol is mainly used to create a mini
  network by connecting the parallel ports of two local machines) or
  AX.25/KISS (protocol for sending internet traffic over radio links).
  Make sure to read the NET-2-HOWTO.  Eventually, you will have to
  read Olaf Kirch's excellent book "Network Administrator's Guide", to
  be found in sunsite.unc.edu:/pub/Linux/docs/LDP.  If unsure, say Y.

Ethernet (10 or 100Mbit)
CONFIG_NET_ETHERNET
  Ethernet is the most common protocol used on Local Area Networks
  (LANs) in universities or companies. 10-base-2 and 10-base-T and
  100-base-<whatever> are common types of Ethernet. If your Linux
  machine will be connected to an Ethernet and you have an Ethernet
  network card installed in your computer, say Y here and read the
  Ethernet-HOWTO, available via FTP (user: anonymous) from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  Note that the answer to this
  question won't directly affect the kernel: saying N will just cause
  this configure script to skip all the questions about Ethernet
  network cards. If unsure, say N.

Dummy net driver support
CONFIG_DUMMY
  This is essentially a bit-bucket device (i.e. traffic you send to
  this device is consigned into oblivion) with a configurable IP
  address.  It is most commonly used in order to make your currently
  inactive SLIP address seem like a real address for local programs.
  If you use SLIP or PPP, you might want to enable it.  Read about it
  in the Network Administrator's Guide, available via FTP (user:
  anonymous) from sunsite.unc.edu:/pub/Linux/docs/LDP.  Since this
  thing comes often handy, the default is Y.  It won't enlarge your
  kernel either.  What a deal.  If you want to compile this as a
  module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt. If you want to use more than one dummy
  device at a time, you need to compile it as a module. Instead of
  'dummy', it will they will then be called 'dummy0', 'dummy1' etc.

SLIP (serial line) support
CONFIG_SLIP
  Say Y if you intend to use SLIP or CSLIP (compressed SLIP) to
  connect to your Internet service provider or to connect to some
  other local Unix box or if you want to configure your Linux box as
  a Slip/CSlip server for other people to dial in.  SLIP (Serial Line
  Internet Protocol) is the protocol used to send Internet traffic
  over telephone lines or serial cables (also known as nullmodems).
  Normally, your access provider has to support SLIP in order for you
  to be able to use it, but there is now a SLIP emulator called SLiRP
  around (available via FTP (user: anonymous) from sunsite.unc.edu:
  /pub/Linux/system/Network/serial/) which allows you to use SLIP over
  a regular dial up shell connection.  If you plan to use SLiRP, make
  sure to say Y to CSLIP, below.  The NET-2-HOWTO, available via FTP
  (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO, explains
  how to configure SLIP.  Note that you don't need this option if you
  just want to run term (term is a program which gives you almost full
  Internet connectivity if you have a regular dial up shell account on
  some Internet connected Unix computer.  Read the Term-HOWTO).  SLIP
  support will enlarge your kernel by about 4kB.  If unsure, say N.
  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.

CSLIP compressed headers
CONFIG_SLIP_COMPRESSED
  This protocol is faster than SLIP because it uses compression on the
  TCP/IP headers (not on the data itself), but it has to be supported
  on both ends.  Ask your access provider if you are not sure and
  say Y, just in case.  You will still be able to use plain SLIP.  If
  you plan to use SLiRP, the SLIP emulator (available via FTP (user:
  anonymous) from sunsite.unc.edu:/pub/Linux/system/Network/serial/)
  which allows you to use SLIP over a regular dial up shell
  connection, you definitely want to say Y here.
  The NET-2-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO, explains how to configure
  CSLIP.  This won't enlarge your kernel.

Keepalive and linefill
CONFIG_SLIP_SMART
  Adds additional capabilities to the SLIP driver to support the
  RELCOM line fill and keepalive monitoring.  Ideal on poor quality
  analogue lines.

Six bit SLIP encapsulation
CONFIG_SLIP_MODE_SLIP6
  Just occasionally you may need to run IP over hostile serial
  networks that don't pass all control characters or are only seven
  bit.  Saying Y here adds an extra mode you can use with SLIP:
  "slip6".  In this mode, SLIP will only send normal ascii symbols
  over the serial device.  Naturally, this has to be supported at the
  other end of the link as well.  It's good enough, for example, to
  run IP over the async ports of a Camtec JNT Pad.  If unsure, say N.

Radio network interfaces
CONFIG_NET_RADIO
  Radio based interfaces for Linux.  This includes amateur radio
  (AX.25), support for wireless Ethernet and other systems.  Note that
  the answer to this question won't directly affect the kernel:
  saying N will just cause this configure script to skip all the
  questions about radio interfaces. Some user-level drivers for scarab
  devices which don't require special kernel support are available via
  FTP (user: anonymous) from shadow.cabi.net.  If unsure, say N.

PPP (point-to-point) support
CONFIG_PPP
  PPP (Point to Point Protocol) is a newer and better SLIP.  It serves
  the same purpose: sending Internet traffic over telephone (and other
  serial) lines.  Ask your access provider if they support it, because
  otherwise you can't use it (not quite true any more: the free
  program SLiRP can emulate a PPP line if you just have a regular dial
  up shell account on some UNIX computer; get it via FTP (user:
  anonymous) from sunsite.unc.edu:/pub/Linux/system/Network/serial/).
  To use PPP, you need an additional program called pppd as described
  in Documentation/networking/ppp.txt and in the PPP-HOWTO, available
  from sunsite.unc.edu:/pub/Linux/docs/HOWTO. Note that you don't need
  this option if you just want to run term (term is a program which
  gives you almost full Internet connectivity if you have a regular
  dial up shell account on some Internet connected UNIX computer. Read
  the Term-HOWTO).  The PPP option enlarges your kernel by about 16kB.
  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  If you said Y to "Version information on all symbols" above, then
  you cannot compile the PPP driver into the kernel; you can only
  compile it as a module.  If you want to compile it as a module,
  say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.  Note that, no matter what
  you do, the BSD compression code (used to compress the IP packets
  sent over the serial line; has to be supported at the other end as
  well) can only be compiled as a module; it is called bsd_comp.o and
  will show up in the directory modules once you have said "make
  modules".  If unsure, say N.

16 channels instead of 4
CONFIG_PPP_LOTS
  Saying Y here will allow you to have up to 16 PPP connections
  running in parallel.  This is mainly useful if you intend your
  Linux box to act as a dial-in PPP server.  Most people can say N.

STRIP (Starmode Radio IP) support
CONFIG_STRIP
  Say Y if you have a Metricom radio and intend to use Starmode Radio
  IP.  STRIP is a radio protocol developed for the MosquitoNet project
  (http://mosquitonet.stanford.edu/) to send Internet traffic using
  Metricom radios.  Metricom radios are small, battery powered,
  100kbit/sec packet radio transceivers, about the size and weight of
  a cellular telephone.  (You may also have heard them called
  "Metricom modems" but we avoid the term "modem" because it misleads
  many people into thinking that you can plug a Metricom modem into a
  phone line and use it as a modem.)  You can use STRIP on any Linux
  machine with a serial port, although it is obviously most useful for
  people with laptop computers.  If you think you might get a Metricom
  radio in the future, there is no harm in saying yes to STRIP now,
  except that it makes the kernel a bit bigger.

WIC (Radio IP bridge)
CONFIG_WIC
  Support for the WIC parallel port radio bridge. You'll probably want
  to say N.  If you want to compile this driver as a module though
  (= code which can be inserted in and removed from the running kernel
  whenever you want), say M here and read Documentation/modules.txt.

Z8530 SCC kiss emulation driver for AX.25
CONFIG_SCC
  These cards are used to connect your Linux box to an amateur radio
  in order to communicate with other computers.  If you want to use
  this, read Documentation/networking/z8530drv.txt and the HAM-HOWTO,
  available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt.

BAYCOM ser12 and par96 driver for AX.25
CONFIG_BAYCOM
  This is an experimental driver for Baycom style simple amateur radio
  modems that connect to either a serial interface or a parallel
  interface. The driver supports the ser12 and par96 designs. To
  configure the driver, use the sethdlc utility available in the
  standard ax25 utilities package. For information on the modems, see
  http://www.baycom.de and drivers/net/README.baycom.
  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt. This is recommended.

Sound card modem driver for AX.25
CONFIG_SOUNDMODEM
  This experimental driver allows a standard SoundBlaster or
  WindowsSoundSystem compatible sound card to be used as a packet
  radio modem (NOT as a telephone modem!), to send digital traffic
  over amateur radio.
  To configure the driver, use the sethdlc, smdiag and smmixer
  utilities available in the standard ax25 utilities package. For
  information on how to key the transmitter, see
  http://www.ife.ee.ethz.ch/~sailer/pcf/ptt_circ/ptt.html (to browse
  the WWW, you need to have access to a machine on the Internet that
  has a program like lynx or netscape) and
  Documentation/networking/soundmodem.txt.
  If you want to compile this driver as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt. This is recommended.
  The module will be called soundmodem.o.

Sound card modem support for SoundBlaster and compatible cards
CONFIG_SOUNDMODEM_SBC
  This option enables the soundmodem driver to use SoundBlaster and
  compatible cards. If you have a dual mode card (i.e. a WSS cards
  with a SoundBlaster emulation) you should say N here and Y to
  "Sound card modem support for WSS and Crystal cards", below, because
  this usually results in better performance. This option also
  supports SB16/32/64 in full duplex mode.

Sound card modem support for WSS and Crystal cards
CONFIG_SOUNDMODEM_WSS
  This option enables the soundmodem driver to use WindowsSoundSystem
  compatible cards. These cards feature a codec chip from either
  Analog Devices (such as AD1848, AD1845, AD1812) or Crystal
  Semiconductors (such as CS4248, CS423x). This option also supports
  the WSS full duplex operation which currently works with Crystal
  CS423x chips. If you don't need full duplex operation, do not enable
  it to save performance.

Sound card modem support for 1200 baud AFSK modulation
CONFIG_SOUNDMODEM_AFSK1200
  This option enables the soundmodem driver 1200 baud AFSK modem,
  compatible to popular modems using TCM3105 or AM7911.
  The demodulator requires about 12% of the CPU power of a Pentium 75
  CPU per channel.

Sound card modem support for 2400 baud AFSK modulation (7.3728MHz crystal)
CONFIG_SOUNDMODEM_AFSK2400_7
  This option enables the soundmodem driver 2400 baud AFSK modem,
  compatible to TCM3105 modems (over-)clocked with a 7.3728MHz
  crystal. Note that the availability of this driver does _not_ imply
  that I recommend building such links. It is only here since users
  especially in eastern Europe have asked me to do so. In fact this
  modulation scheme has many disadvantages, mainly its incompatibility
  with many transceiver designs and the fact that the TCM3105 (if
  used) is operated widely outside its specifications.

Sound card modem support for 2400 baud AFSK modulation (8MHz crystal)
CONFIG_SOUNDMODEM_AFSK2400_8
  This option enables the soundmodem driver 2400 baud AFSK modem,
  compatible to TCM3105 modems (over-)clocked with an 8MHz crystal.
  Note that the availability of this driver does _not_ imply that
  I recommend building such links. It is only here since users
  especially in eastern Europe have asked me to do so. In fact this
  modulation scheme has many disadvantages, mainly its incompatibility
  with many transceiver designs and the fact that the TCM3105 (if
  used) is operated widely outside its specifications.

Sound card modem support for 2666 baud AFSK modulation
CONFIG_SOUNDMODEM_AFSK2666
  This option enables the soundmodem driver 2666 baud AFSK modem.
  This modem is experimental, and not compatible to anything
  else I know of.

Sound card modem support for 4800 baud 8PSK modulation
CONFIG_SOUNDMODEM_PSK4800
  This option enables the soundmodem driver 4800 baud 8PSK modem.
  This modem is experimental, and not compatible to anything
  else I know of.

Sound card modem support for 4800 baud HAPN-1 modulation
CONFIG_SOUNDMODEM_HAPN4800
  This option enables the soundmodem driver 4800 baud HAPN-1
  compatible modem. This modulation seems to be widely used 'down
  under' and in the Netherlands. Here, nobody uses it, so I could not
  test if it works.  It is compatible to itself, however :-)

Sound card modem support for 9600 baud FSK G3RUH modulation
CONFIG_SOUNDMODEM_FSK9600
  This option enables the soundmodem driver 9600 baud FSK modem,
  compatible to the G3RUH standard. The demodulator requires about 4%
  of the CPU power of a Pentium 75 CPU per channel. You can say Y to
  both 1200 baud AFSK and 9600 baud FSK if you want (but obviously you
  can only use one protocol at a time, depending on what the other end
  can understand).

PLIP (parallel port) support
CONFIG_PLIP
  PLIP (Parallel Line Internet Protocol) is used to create a mini
  network consisting of two (or, rarely, more) local machines. The
  parallel ports (the connectors at the computers with 25 holes) are
  connected using "null printer" or "Turbo Laplink" cables which can
  transmit 4 bits at a time or using special PLIP cables, to be used
  on bidirectional parallel ports only, which can transmit 8 bits at a
  time (you can find the wiring of these cables in
  drivers/net/README?.plip). The cables can be up to 15m long. This
  works also if one of the machines runs DOS/Windows and has some PLIP
  software installed, e.g. the Crynwr PLIP packet driver
  (http://sunsite.cnam.fr/packages/Telnet/PC/msdos/misc/pktdrvr.txt)
  and winsock or NCSA's telnet.  If you want to use this, say Y and
  read the PLIP mini-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini as well as the
  NET-2-HOWTO in sunsite.unc.edu:/pub/Linux/docs/HOWTO. Note that the
  PLIP protocol was changed and this PLIP driver won't work together
  with the PLIP support in Linux versions 1.0.x.  This option enlarges
  your kernel by about 8kB.
  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you want to use both a parallel printer and PLIP, there are two
  cases:
  1) If the printer and the PLIP cable are to use the same parallel
  port (presumably because you have just one), it is best to compile
  both drivers as modules and load and unload them as needed.
  2) To use different parallel ports for the printer and the PLIP
  cable, you can say Y to the printer driver, specify the base address
  of the parallel port(s) to use for the printer(s) with the "lp"
  kernel command line option. (See the documentation of your boot
  loader (lilo or loadlin) about how to pass options to the kernel at
  boot time. The lilo procedure is also explained in the SCSI-HOWTO,
  available via FTP (user: anonymous) in sunsite.unc.edu:
  /pub/Linux/docs/HOWTO.) The standard base addresses as well as the
  syntax of the "lp" command line option can be found in
  drivers/char/lp.c. You can then say Y to this PLIP driver or,
  preferably, M in which case Documentation/networking/net-modules.txt
  tells you how to specify the port and IRQ to be used by PLIP at
  module load time.
  It's safe to say N here.

EQL (serial line load balancing) support
CONFIG_EQUALIZER
  If you have two serial connections to some other computer (this
  usually requires two modems and two telephone lines) and you use
  SLIP ( = the protocol for sending internet traffic over telephone
  lines) or PPP ( = a better SLIP) on them, you can make them behave
  like one double speed connection using this driver. Naturally, this
  has to be supported at the other end as well, either with a similar
  EQL Linux driver or with a Livingston Portmaster 2e. Say Y if you
  want this and read drivers/net/README.eql. This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

Frame Relay (DLCI) support
CONFIG_DLCI
  This is support for the frame relay protocol; frame relay is a fast
  low-cost way to connect to a remote Internet access provider or to
  form a private wide area network. The one physical line from your
  box to the local "switch" (i.e. the entry point to the frame relay
  network, usually at the phone company) can carry several logical
  point-to-point connections to other computers connected to the frame
  relay network. For a general explanation of the protocol, check out
  http://frame-relay.indiana.edu/4000/4000index.html on the WWW. (To
  browse the WWW, you need to have access to a machine on the Internet
  that has one of the programs lynx, netscape or Mosaic.) To use frame
  relay, you need supporting hardware (FRAD) and certain programs from
  the net-tools package as explained in
  Documentation/networking/framerelay.txt. This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

Max open DLCI
CONFIG_DLCI_COUNT
  This is the maximal number of logical point-to-point frame relay
  connections (the identifiers of which are called DCLIs) that
  the driver can handle. The default is probably fine.

Max DLCI per device
CONFIG_DLCI_MAX
  You can specify here how many logical point-to-point frame relay
  connections (the identifiers of which are called DCLIs) should be
  handled by each of your hardware frame relay access devices. Go with
  the default.

Sangoma S502A FRAD support
CONFIG_SDLA
  Say Y here if you need a driver for the Sangoma S502A, S502E, and
  S508 Frame Relay Access Devices.  These are multi-protocol cards,
  but only frame relay is supported by the driver at this time.
  Please read Documentation/framerelay.txt.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want).  If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

Sun LANCE Ethernet support
CONFIG_SUN_LANCE
  This is support for lance Ethernet cards on Sun workstations such as
  the SPARCstation IPC (any SPARC with a network interface 'le0' under
  SunOS basically).

Sun Intel Ethernet support
CONFIG_SUN_INTEL
  This is support for the Intel Ethernet cards on some Sun
  workstations (all those with a network interface 'ie0' under SunOS).

Western Digital/SMC cards
CONFIG_NET_VENDOR_SMC
  If you have a network (Ethernet) card belonging to this class, say Y
  and read the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you plan to use more than
  one network card under Linux, read the Multiple-Ethernet-mini-HOWTO,
  available from sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini. Note that
  the answer to this question doesn't directly affect the kernel:
  saying N will just cause this configure script to skip all the
  questions about Western Digital cards. If you say Y, you will be
  asked for your specific card in the following questions.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

WD80*3 support
CONFIG_WD80x3
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

SMC Ultra support
CONFIG_ULTRA
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt as
  well as Documentation/networking/net-modules.txt. If you plan to use
  more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.
  Important: There have been many reports that, with some motherboards
  mixing an SMC Ultra and an Adaptec AHA1542 SCSI card causes
  corruption problems with many operating systems.

SMC Ultra32 support
CONFIG_ULTRA32
  This is support for the SMC Ultra32 EISA card in shared memory mode.
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt as
  well as Documentation/networking/net-modules.txt. If you plan to use
  more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

SMC 9194 Support
CONFIG_SMC9194
  This is support for the SMC9xxx based Ethernet cards.  Choose this
  option if you have a DELL laptop with the docking station, or
  another SMC9192/9194 based chipset.  Say Y if you want it compiled
  into the kernel, and read the file drivers/net/README.smc9 and
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt as
  well as Documentation/networking/net-modules.txt. If you plan to use
  more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

AMD LANCE and PCnet (AT1500 and NE2100) support
CONFIG_LANCE
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you plan to use more than
  one network card under Linux, read the Multiple-Ethernet-mini-HOWTO,
  available from sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

3COM cards
CONFIG_NET_VENDOR_3COM
  If you have a network (Ethernet) card belonging to this class, say Y
  and read the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  Note that the answer to this
  question doesn't directly affect the kernel: saying N will just
  cause this configure script to skip all the questions about 3COM
  cards. If you say Y, you will be asked for your specific card in the
  following questions. If you plan to use more than one network card
  under Linux, read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

3c501 support
CONFIG_EL1
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  Also, consider buying a new
  card, since the 3c501 is slow and obsolete.  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want).  If you want to compile
  it as a module, say M here and read Documentation/modules.txt as
  well as Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini -- and don't use 3c501s.

3c503 support
CONFIG_EL2
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

3c505 support
CONFIG_ELPLUS
  Information about this network (Ethernet) card can be found in
  Documentation/networking/3c505.txt. If you have a card of this type,
  say Y and read the Ethernet-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to
  compile this as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

3c507 support
CONFIG_EL16
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

3c509/3c579 support
CONFIG_EL3
  If you have a network (Ethernet) card belonging to the 3Com
  EtherLinkIII series, say Y and read the Ethernet-HOWTO, available
  via FTP (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.
  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt. If you plan to use more
  than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini. If your card is not
  working you may need to use the DOS setup disk to disable Plug &
  Play mode, and to select the default media type.

3c590 series (592/595/597) "Vortex" support
CONFIG_VORTEX
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. More specific information is
  in Documentation/networking/vortex.txt and in the comments at the
  beginning of drivers/net/3c59x.c. If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt. If you plan to use more
  than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

Other ISA cards
CONFIG_NET_ISA
  If your network (Ethernet) card hasn't been mentioned yet and its
  bus system (that's the way the components of the card talk to each
  other) is ISA (as opposed to EISA, VLB or PCI), say Y. Make sure you
  know the name of your card. Read the Ethernet-HOWTO, available via
  FTP (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO. If
  unsure, say Y.  Note that the answer to this question doesn't
  directly affect the kernel: saying N will just cause this configure
  script to skip all the remaining ISA network card questions.  If you
  say Y, you will be asked for your specific card in the following
  questions.  If you plan to use more than one network card under
  Linux, read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

ARCnet support
CONFIG_ARCNET
  If you have a network card of this type, say Y and check out the
  (arguably) beautiful poetry in Documentation/networking/arcnet.txt.
  You might also want to have a look at the Ethernet-HOWTO, available
  via FTP (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO
  (even though ARCnet is not really Ethernet).  This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want).  If you want to compile
  it as a module, say M here and read Documentation/modules.txt as
  well as Documentation/networking/net-modules.txt. If you plan to
  use more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

Enable arc0e (ARCnet "ether-encap" packet format)
CONFIG_ARCNET_ETH
  This allows you to use "Ethernet encapsulation" with your ARCnet
  card via the virtual arc0e device.  You only need arc0e if you want
  to talk to nonstandard ARCnet software, specifically,
  DOS/Windows-style "NDIS" drivers.  You do not need to enable this
  option to communicate with industry-standard RFC1201
  implementations, like the arcether.com packet driver or most
  DOS/Windows ODI drivers.  RFC1201 is included automatically as the
  arc0 device.  Please read the ARCnet documentation in
  Documentation/networking/arcnet.txt for more information about
  using arc0e and arc0s.

Enable arc0s (ARCnet RFC1051 packet format)
CONFIG_ARCNET_1051
  This allows you to use RFC1051 with your ARCnet card via the virtual
  arc0s device.  You only need arc0s if you want to talk to ARCnet
  software complying with the "old" standard, specifically, the DOS
  arcnet.com packet driver, Amigas running AmiTCP, and some variants
  of NetBSD. You do not need to enable this option to communicate with
  industry-standard RFC1201 implementations, like the arcether.com
  packet driver or most DOS/Windows ODI drivers.  RFC1201 is included
  automatically as the arc0 device.  Please read the ARCnet
  documentation in Documentation/networking/arcnet.txt for more
  information about using arc0e and arc0s.

Cabletron E21xx support
CONFIG_E2100
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

DEPCA support
CONFIG_DEPCA
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO as well as
  drivers/net/depca.c.  If you want to compile this as a module
  (= code which can be inserted in and removed from the running kernel
  whenever you want), say M here and read Documentation/modules.txt as
  well as Documentation/networking/net-modules.txt. If you plan to use
  more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

EtherWorks 3 support
CONFIG_EWRK3
  This driver supports the DE203, DE204 and DE205 network (Ethernet)
  cards. If this is for you, say Y and read drivers/net/README.ewrk3
  in the kernel source as well as the Ethernet-HOWTO, available via
  FTP (user: anonymous) from sunsite.unc.edu:/pub/Linux/docs/HOWTO.
  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt. If you plan to use more
  than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

SEEQ8005 support
CONFIG_SEEQ8005
  This is a driver for the SEEQ 8005 network (Ethernet) card. If this
  is for you, read the Ethernet-HOWTO, available via FTP (user:
  anonymous) from sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you plan
  to use more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

AT1700 support
CONFIG_AT1700
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

FMV-181/182/183/184 support
CONFIG_FMV18X
  If you have a Fujitsu FMV-181/182/183/184 network (Ethernet) card,
  say Y and read the Ethernet-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.
  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  If you want to compile it as a module, say M here and read
  Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.
  If you use FMV-183 or FMV-184 and it is not working, you may need
  to disable Plug & Play mode of the card.

Intel EtherExpress/Pro 100B support'
CONFIG_EEXPRESS_PRO100B
  If you have an Intel EtherExpress Pro 100 10/100Mbps PCI Ethernet
  card, answer yes.  As of kernel release 2.0.31 this driver was
  still experimental.

EtherExpressPro support
CONFIG_EEXPRESS_PRO
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

EtherExpress support
CONFIG_EEXPRESS
  If you have an EtherExpress16 network (Ethernet) card, say Y and
  read the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. Note that the Intel
  EtherExpress16 card used to be regarded as a very poor choice
  because the driver was very unreliable. We now have a new driver
  that should do better. If you want to compile this driver as a
  module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt. If you plan to use more
  than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

NI5210 support
CONFIG_NI52
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you plan to use more than
  one network card under Linux, read the Multiple-Ethernet-mini-HOWTO,
  available from sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

NI6510 support
CONFIG_NI65
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you plan to use more than
  one network card under Linux, read the Multiple-Ethernet-mini-HOWTO,
  available from sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

Ottawa PI and PI/2 support
CONFIG_PI
  This is a driver for the Ottawa Amateur Radio Club PI and PI2 cards,
  which are commonly used to send internet traffic over amateur radio.
  More information about these cards is on the WWW at
  http://hydra.carleton.ca/info/pi2.html (To browse the WWW, you need
  to have access to a machine on the Internet that has one of the
  programs lynx, netscape or Mosaic). If you have one of these cards,
  you can say Y here and should read the HAM-HOWTO, available via FTP
  (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO. Also,
  you should have said Y to "AX.25 support" above, because AX.25 is
  the protocol used for digital traffic over radio links.

Gracilis PackeTwin support
CONFIG_PT
  This card is similar to the PI card (mentioned above).  It is used
  mainly by amateur radio operators for packet radio.  You should have
  already said Y to "AX.25 support" as this card uses that protocol.
  More information about this driver can be found in the file
  drivers/net/README.pt.  NOTE: The card is capable of DMA and full
  duplex but neither of these have been coded in the driver as yet.

AT&T WaveLAN & DEC RoamAbout DS support
CONFIG_WAVELAN
    The Lucent Wavelan (formerly NCR and AT&T ; or DEC RoamAbout DS)
  is a Radio LAN (wireless Ethernet-like) at 900 MHz and 2.4 GHz.
    This driver support the ISA version of the Wavelan. A driver for
  the pcmcia hardware is available in David Hinds's pcmcia package.
    This driver is fairly stable and may be compiled as a module
  (wavelan.o). It implements many nice feature and the Wireless
  Extensions (you must get the Wireless tools from the net).
    For documentation, refer to:
      o the wavelan man page, wireless tools man pages
      o wavelan.p.h and the source code
      o Ethernet-HOWTO, Multiple-Ethernet-mini-HOWTO, Module-HOWTO
      o More documentation to come when I will have the time :-)

HP PCLAN+ (27247B and 27252A) support
CONFIG_HPLAN_PLUS
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

HP PCLAN (27245 and other 27xxx series) support
CONFIG_HPLAN
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

HP 10/100VG PCLAN (ISA, EISA, PCI) support
CONFIG_HP100
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt. If you plan to use more
  than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

NE2000/NE1000 support
CONFIG_NE2000
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

SK_G16 support
CONFIG_SK_G16
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you plan to use more than
  one network card under Linux, read the Multiple-Ethernet-mini-HOWTO,
  available from sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

EISA, VLB, PCI and on board controllers
CONFIG_NET_EISA
  This is another class of network cards which attach directly to the
  bus. If you have one of those, say Y and read the Ethernet-HOWTO,
  available via FTP (user: anonymous) from sunsite.unc.edu:
  /pub/Linux/docs/HOWTO; if you are unsure, say Y.
  Note that the answer to this question doesn't directly affect the
  kernel: saying N will just cause this configure script to skip all
  the questions about this class of network cards. If you say Y, you
  will be asked for your specific card in the following questions.
  If you plan to use more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

Ansel Communications EISA 3200 support
CONFIG_AC3200
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

Apricot Xen-II on board Ethernet
CONFIG_APRICOT
  If you have a network (Ethernet) controller of this type, say Y and
  read the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt. If you plan to use more
  than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

DE425, DE434, DE435 support
CONFIG_DE4X5
  This is support for the DIGITAL series of PCI/EISA Ethernet
  cards. These include the DE425, DE434, DE435, DE450 and DE500
  models. If you have a network card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  More specific information is
  contained in drivers/net/README.de4x5. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

DECchip Tulip (dc21x4x) PCI support
CONFIG_DEC_ELCP
  This driver is developed for the SMC EtherPower series Ethernet
  cards and also works with cards based on the DECchip
  21040/21041/21140 (Tulip series) chips. (If your card is NOT SMC
  EtherPower 10/100 PCI (smc9332dst), you can also try the driver from
  "DE425, DE434, DE435 support", above.) However, most people with a
  network card of this type will say Y here. Do read the
  Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. More specific information is
  contained in Documentation/networking/tulip.txt. This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want).  If you want to compile
  it as a module, say M here and read Documentation/modules.txt as
  well as Documentation/networking/net-modules.txt.

Digi Intl. RightSwitch support
CONFIG_DGRS
  This is support for the Digi International RightSwitch series of
  PCI/EISA Ethernet switch cards.  These include the SE-4 and the SE-6
  models. If you have a network card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  More specific information is
  contained in drivers/net/README.dgrs. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

ICL EtherTeam 16i/32 support
CONFIG_ETH16I
  If you have a network (Ethernet) card of this type, say Y and read
  the Ethernet-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO. This driver is also available
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want). If you want to compile it as a
  module, say M here and read Documentation/modules.txt as well as
  Documentation/networking/net-modules.txt.
  If you plan to use more than one network card under Linux,
  read the Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

TI ThunderLAN support
CONFIG_TLAN
  If you have a TLAN based network card which is supported by this
  driver, say Y and read the Ethernet-HOWTO.  Devices currently
  supported are the Compaq Netelligent 10, Netelligent 10/100, and
  Internal NetFlex 3.  This driver is also available as a module.
  Please email feedback to james.banks@caldera.com.

VIA Rhine support
CONFIG_VIA_RHINE
  If you have a VIA "rhine" based network card (Rhine-I (3043) or
  Rhine-2 (VT86c100A)), say Y here. To build this driver as a module
  say M.

Zenith Z-Note support
CONFIG_ZNET
  The Zenith Z-Note notebook computer has a built-in network
  (Ethernet) card, and this is the Linux driver for it. Note that the
  IBM Thinkpad 300 is compatible with the Z-Note and is also supported
  by this driver. Read the Ethernet-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.

Pocket and portable adapters
CONFIG_NET_POCKET
  Cute little network (Ethernet) devices which attach to the parallel
  port ("pocket adapters"), commonly used with laptops. If you have
  one of those, say Y and read the Ethernet-HOWTO, available via FTP
  (user: anonymous) from sunsite.unc.edu:/pub/Linux/docs/HOWTO. If you
  want to plug a network card into the PCMCIA slot of your laptop
  instead (PCMCIA is the standard for credit card size extension cards
  used by all modern laptops), look in
  cb-iris.stanford.edu:/pub/pcmcia and say N here.  Note that the
  answer to this question doesn't directly affect the kernel: saying N
  will just cause this configure script to skip all the questions
  about this class of network devices.  If you say Y, you will be
  asked for your specific device in the following questions.  If you
  plan to use more than one network device under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini. If you intend to use an
  adapter attaching to the parallel port as well as a parallel
  printer, you should compile both drivers as modules (if possible).

AT-LAN-TEC/RealTek pocket adapter support
CONFIG_ATP
  This is a network (Ethernet) device which attaches to your parallel
  port. Read drivers/net/atp.c as well as the Ethernet-HOWTO,
  available via FTP (user: anonymous) from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO if you want to use this. If
  you plan to use more than one network card under Linux, read the
  Multiple-Ethernet-mini-HOWTO, available from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini. If you intend to use
  this driver, you should have said N to the Parallel Printer support,
  because the two drivers don't like each other.

D-Link DE600 pocket adapter support
CONFIG_DE600
  This is a network (Ethernet) device which attaches to your parallel
  port. Read drivers/net/README.DLINK as well as the Ethernet-HOWTO,
  available via FTP (user: anonymous) from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO if you want to use this.  If
  you want to compile this as a module ( = code which can be inserted
  in and removed from the running kernel whenever you want), say M
  here and read Documentation/modules.txt. If you intend to use this
  pocket adapter as well as a parallel printer, you should compile
  both drivers as modules. If you plan to use more than one network
  card under Linux, read the Multiple-Ethernet-mini-HOWTO, available
  from sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

D-Link DE620 pocket adapter support
CONFIG_DE620
  This is a network (Ethernet) device which attaches to your parallel
  port. Read drivers/net/README.DLINK as well as the Ethernet-HOWTO,
  available via FTP (user: anonymous) from
  sunsite.unc.edu:/pub/Linux/docs/HOWTO if you want to use this.  If
  you want to compile this as a module ( = code which can be inserted
  in and removed from the running kernel whenever you want), say M
  here and read Documentation/modules.txt. If you intend to use this
  pocket adapter as well as a parallel printer, you should compile
  both drivers as modules. If you plan to use more than one network
  card under Linux, read the Multiple-Ethernet-mini-HOWTO, available
  from sunsite.unc.edu:/pub/Linux/docs/HOWTO/mini.

Token Ring driver support
CONFIG_TR
  Token Ring is IBM's way of communication on a local network; the
  rest of the world uses Ethernet. If you are connected to a token
  ring network and want to use your Token Ring card under Linux,
  say Y.  Most people can say N here.

IBM Tropic chipset based adapter support
CONFIG_IBMTR
  This is support for all IBM Token Ring cards that don't use DMA. If
  you have such a beast, say Y, otherwise N. Warning: this driver will
  almost definitely fail if more than one active Token Ring card is
  present. This driver is also available as a module ( = code which
  can be inserted in and removed from the running kernel whenever you
  want). If you want to compile it as a module, say M here and read
  Documentation/modules.txt.

Support non-SCSI/IDE/ATAPI drives
CONFIG_CD_NO_IDESCSI
  If you have a CDROM drive that is neither SCSI nor IDE/ATAPI, say Y
  here, otherwise N. Read the CDROM-HOWTO, available via FTP (user:
  anonymous) from sunsite.unc.edu:/pub/Linux/docs/HOWTO. Note that the
  answer to this question doesn't directly affect the kernel: saying N
  will just cause this configure script to skip all the questions
  about these CDROM drives. If you are unsure what you have, say Y and
  find out whether you have one of the following drives.
  For each of these drivers, a file Documentation/cdrom/<driver_name>
  exists. Especially in cases where you do not know exactly which kind
  of drive you have you should read there.
  Most of these drivers use a file include/linux/<driver_name>.h where
  you can define your interface parameters and switch some internal
  goodies.
  All these CDROM drivers are also usable as a module ( = code which
  can be inserted in and removed from the running kernel whenever you
  want).  If you want to compile them as module, say M instead of Y
  and read Documentation/modules.txt.
  If you want to use any of these CDROM drivers, you also have to say
  Y to "ISO9660 cdrom filesystem support" below (this answer will get
  "defaulted" for you if you enable any of the Linux CDROM drivers).

Sony CDU31A/CDU33A CDROM support
CONFIG_CDU31A
  These CDROM drives have a spring-pop-out caddyless drawer, and a
  rectangular green LED centered beneath it.  NOTE: these CDROM drives
  will not be auto detected by the kernel at boot time; you have to
  provide the interface address as an option to the kernel at boot
  time as described in Documentation/cdrom/cdu31a or fill in your
  parameters into linux/drivers/cdrom/cdu31a.c. See the documentation
  of your boot loader (lilo or loadlin) about how to pass options to
  the kernel. The lilo procedure is also explained in the SCSI-HOWTO.

Standard Mitsumi [no XA/Multisession] CDROM support
CONFIG_MCD
  This is the older of the two drivers for the older Mitsumi models
  LU-005, FX-001 and FX-001D. This is not the right driver for
  the FX-001DE and the triple or quad speed models (all these are
  IDE/ATAPI models).
  With the old LU-005 model, the whole drive chassis slides out for
  cd insertion. The FX-xxx models use a motorized tray type mechanism.
  Note that this driver does not support XA or MultiSession CDs
  (PhotoCDs).  There is a new driver (next question) which can do
  this. If you want that one, say N here.
  If the driver doesn't work out of the box, you might want to have
  a look at linux/include/linux/mcd.h.

Mitsumi [XA/MultiSession] support
CONFIG_MCDX
  Use this driver if you want to be able to read XA or MultiSession
  CDs (PhotoCDs) as well as ordinary CDs with your Mitsumi LU-005,
  FX-001 or FX-001D CDROM drive.  In addition, this driver uses much
  less kernel memory than the old one, if that is a concern.  This
  driver is able to support more than one drive, but each drive needs
  a separate interface card.  Check out Documentation/cdrom/mcdx.

Matsushita/Panasonic/Creative, Longshine, TEAC CDROM support
CONFIG_SBPCD
  This driver supports most of the drives which use the Panasonic or
  SoundBlaster interface.
  The Matsushita CR-521, CR-522, CR-523, CR-562, CR-563 drives
  (sometimes labeled "Creative"), the CreativeLabs CD200, the
  Longshine LCS-7260, the "IBM External ISA CDROM" (in fact a CR-56x
  model), the TEAC CD-55A fall under this category. Some other
  "electrically compatible" drives (Vertos, Genoa, some Funai models)
  are currently not supported; for the Sanyo H94A drive currently a
  separate driver (asked later) is responsible.  Most drives have a
  uniquely shaped faceplate, with a caddyless motorized drawer, but
  without external brand markings. The older CR-52x drives have a
  caddy and manual loading/eject, but still no external markings.  The
  driver is able to do an extended auto-probing for interface
  addresses and drive types; this can help to find facts in cases you
  are not sure, but can consume some time during the boot process if
  none of the supported drives gets found.
  Once your drive got found, you should enter the reported parameters
  into linux/include/linux/sbpcd.h and set "DISTRIBUTION 0" there.
  This driver can support up to four CDROM interface cards, and each
  card can support up to four CDROM drives; if you say Y here, you
  will be asked how many controllers you have. If compiled as a
  module, only one interface card (but with up to four drives) is
  usable.

Matsushita/Panasonic, ... second CDROM controller support
CONFIG_SBPCD2
  Say Y here only if you have two CDROM controller boards of this type
  (usually only if you have more than four drives). You should enter
  the parameters for the second, third and fourth interface card into
  linux/include/linux/sbpcd.h before compiling the new kernel.

Aztech/Orchid/Okano/Wearnes/TXC/CyDROM  CDROM support
CONFIG_AZTCD
  This is your driver if you have an Aztech CDA268-01A, Orchid
  CD-3110, Okano or Wearnes CDD110, Conrad TXC, or CyCDROM CR520 or
  CR540 CDROM drive. This driver -- just like all these CDROM drivers
  -- is NOT for CDROM drives with IDE/ATAPI interface, such as Aztech
  CDA269-031SE.

Sony CDU535 CDROM support
CONFIG_CDU535
  This is the driver for the older Sony CDU-535 and CDU-531 CDROM
  drives.

Goldstar R420 CDROM support
CONFIG_GSCD
  If this is your CDROM drive, say Y here.
  As described in linux/Documentation/cdrom/gscd, you might have to
  change a setting in the file include/linux/gscd.h before compiling
  the kernel.

Philips/LMS CM206 CDROM support
CONFIG_CM206
  If you have a Philips/LMS CDROM drive cm206 in combination with a
  cm260 host adapter card, say Y here.

Optics Storage DOLPHIN 8000AT CDROM support
CONFIG_OPTCD
  This is the driver for the 'DOLPHIN' drive with a 34-pin Sony
  compatible interface. It also works with the Lasermate CR328A. If
  you have one of those, say Y. This driver does not work for the
  Optics Storage 8001 drive; use the IDE-ATAPI CDROM driver for that
  one.

Sanyo CDR-H94A CDROM support
CONFIG_SJCD
  If this is your CDROM drive, say Y here. Command line option
  (or 'append=' option in /etc/lilo.conf) is:
                sjcd=<port>
  Here 'port' is the base i/o address used by the drive. It defaults
  to port=0x340.

Soft configurable cdrom interface card support
CONFIG_CDI_INIT
  If you want to include boot-time initialization of any cdrom
  interface card that is software configurable, say Y here.
  Currently only the ISP16/MAD16/Mozart cards are supported.

ISP16/MAD16/Mozart soft configurable cdrom interface support
CONFIG_ISP16_CDI
  If you want any of these cdrom interface cards based on the
  OPTi 82C928 or 82C929 chips get detected and possibly configured
  at boot time, please say Y. Boot time command line options (or
  'append=' options in /etc/lilo.conf) are:
                isp16=<port>,<irq>,<dma>,<drive_type>
  Here 'port','irq' and 'dma' are the base i/o address, IRQ number and
  DMA line assumed to be used by the attached cdrom
  drive. 'drive_type' is the type of cdrom drive or its emulation
  mode. Valid values for drive_type include: Sanyo, Panasonic (same as
  Sanyo), Sony and Mitsumi.  Default values are: port=0x340, irq=0,
  dma=0, drive_type=Sanyo.
  The command line
                isp16=noisp16
  will skip detection and configuration after all.
  N.B. options are case sensitive.
  Read Documentation/cdrom/isp16 for details.

Quota support
CONFIG_QUOTA
  If you say Y here, you will be able to set per user limits for disk
  usage (also called diskquotas). Currently, it works only for the
  ext2 filesystem. You need additional software in order to use quota
  support; check the file Documentation/Changes for that. Probably the
  quota support is only useful for multi user systems. If unsure,
  say N.

Mandatory lock support
CONFIG_LOCK_MANDATORY
  File locking is a system designed to prevent that several processes
  write to the same file at the same time, causing data
  corruption. Mandatory file locking is more secure than the usual
  algorithm and is used by some Unix System 5 style database
  applications. For details, read Documentation/mandatory.txt. To use
  this option safely you must have newer NFS daemons, new samba, new
  netatalk, new mars-nwe and other file servers. At the time of
  writing none of these are available. So it's safest to say N here
  unless you really know that you need this feature.

Minix fs support
CONFIG_MINIX_FS
  Minix is a simple operating system used in many classes about OS's.
  The minix filesystem ( = method to organize files on a hard disk
  partition or a floppy disk) was the original filesystem for Linux,
  has been superseded by the second extended filesystem ext2fs but is
  still used for root/boot and other floppies or ram disks since it is
  leaner. You don't want to use it on your hard disk because of
  certain built-in restrictions. This option will enlarge your kernel
  by about 25 kB. Everyone should say Y or M so that they are able to
  read this common floppy format. If you want to compile this as
  a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt. Note that the filesystem of your root
  partition cannot be compiled as a module.

Extended fs support
CONFIG_EXT_FS
  This is the old Linux filesystem ( = method to organize files on a
  hard disk partition or a floppy disk) and not in use anymore.
  It enlarges your kernel by about 25 kB. Let's all kill this beast.
  Say N.

Second extended fs support
CONFIG_EXT2_FS
  This is the de facto standard Linux filesystem ( = method to
  organize files on a storage device) for hard disks. You want to
  say Y, unless you intend to use Linux exclusively from inside a DOS
  partition using the umsdos filesystem. The advantage of the latter
  is that you can get away without repartitioning your hard drive
  (which often implies backing everything up and restoring
  afterwards); the disadvantage is that Linux becomes susceptible to
  DOS viruses and that umsdos is somewhat slower than ext2fs. Even if
  you want to run Linux in this fashion, it might be a good idea to
  have ext2fs around: it enables you to read more floppy disks and
  facilitates the transition to a *real* Linux partition later.
  Another (rare) case which doesn't require ext2fs is a diskless Linux
  box which mounts all files over the network using NFS (in this case
  it's sufficient to enable NFS filesystem support below; if you are
  planning to do this, have a look at the netboot package in
  /pub/Linux/system/Linux-boot/, available via FTP (user: anonymous)
  from sunsite.unc.edu, extract with "tar xzvf filename"). There is a
  short ext2fs-FAQ, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/faqs. This option will enlarge your
  kernel by about 41 kB. Default is Y.

xiafs filesystem support
CONFIG_XIA_FS
  This is an old filesystem ( = method to organize files on a hard
  disk partition or a floppy disk) and not in use anymore. This option
  would enlarge your kernel by about 28 kB. Let's all kill this beast:
  say N. If you want to compile this as a module ( = code which can
  be inserted in and removed from the running kernel whenever you
  want), say M here and read Documentation/modules.txt. Note that the
  filesystem of your root partition cannot be compiled as a module.

fat fs support
CONFIG_FAT_FS
  If you want to use one of the FAT-based filesystems (the MS-DOS,
  VFAT (Windows'95) and UMSDOS filesystems), then you must include
  FAT support. This is not a filesystem in itself, but it provides
  the foundation for the other filesystems. This option will enlarge
  your kernel about 24 kB. If unsure, say Y. If you want to compile
  this as a module however ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt. Note that if you compile the FAT
  support as a module, you cannot compile any of the FAT-based
  filesystems into the kernel -- they will have to be modules as well.
  The filesystem of your root partition cannot be a module.

msdos fs support
CONFIG_MSDOS_FS
  This allows you to mount MSDOS partitions of your hard drive (unless
  they are compressed; to access compressed MSDOS partitions under
  Linux, you can either use the DOS emulator DOSEMU, described in the
  DOSEMU-HOWTO, available via FTP (user: anonymous) at
  sunsite.unc.edu:/pub/Linux/docs/HOWTO, or try dmsdosfs in
  sunsite.unc.edu:/pub/Linux/system/Filesystems/dosfs. If you intend
  to use dosemu with a non-compressed MSDOS partition, say Y here) and
  MSDOS floppies. This means that file access becomes transparent,
  i.e. the MSDOS files look and behave just like all other Unix files.
  Another way to read and write MSDOS floppies from within Linux (but
  not transparently) is with the mtools ("man mtools") program suite,
  which doesn't require the msdos filesystem support.  If you want to
  use umsdos, the Unix-like filesystem on top of DOS, which allows you
  to run Linux from within a DOS partition without repartitioning,
  you'll have to say Y or M here. If your have Windows'95 or Windows
  NT installed on your MSDOS partitions, you should use the VFAT
  filesystem instead, or you will not be able to see the long
  filenames generated by Windows'95 / Windows NT. This option will
  enlarge your kernel by about 7 kB. If unsure, say Y. This will only
  work if you said Y to "fat fs support" as well. If you want to
  compile this as a module however ( = code which can be inserted in
  and removed from the running kernel whenever you want), say M here
  and read Documentation/modules.txt. Note that the filesystem of your
  root partition cannot be a module.

vfat fs support
CONFIG_VFAT_FS
  This allows you to mount MSDOS partitions of your hard drive. It
  will let you use filenames in a way compatible with the long
  filenames used by Windows'95 and Windows NT fat-based (not NTFS)
  partitions. It does not support Windows'95 compressed filesystems.
  You cannot use the VFAT filesystem for your root partition; use
  UMSDOS instead. This option enlarges your kernel by about 10 kB and
  it only works if you enabled the "fat fs support" above. Please read
  the file Documentation/filesystems/vfat.txt for details.
  If unsure, say N. If you want to compile this as a module ( = code
  which can be inserted in and removed from the running kernel
  whenever you want), say M here and read Documentation/modules.txt.

umsdos: Unix like fs on top of std MSDOS fs
CONFIG_UMSDOS_FS
  Say Y here if you want to run Linux from within an existing DOS
  partition of your hard drive. The advantage of this is that you can
  get away without repartitioning your hard drive (which often implies
  backing everything up and restoring afterwards) and hence you're
  able to quickly try out Linux or show it to your friends; the
  disadvantage is that Linux becomes susceptible to DOS viruses and
  that UMSDOS is somewhat slower than ext2fs.  Another use of umsdos
  is to write files with long unix filenames to MSDOS floppies; it
  also allows unix style softlinks and owner/permissions of files on
  MSDOS floppies. You will need a program called umssync in order to
  make use of umsdos. Read Documentation/filesystems/umsdos.txt. This
  option enlarges your kernel by about 25 kB and it only works if you
  enabled both "fat fs support" and "msdos fs support" above. If
  unsure, say N.  If you want to compile this as a module ( = code
  which can be inserted in and removed from the running kernel
  whenever you want), say M here and read Documentation/modules.txt.
  Note that the filesystem of your root partition cannot be a module.

nls: Native language codepages and Unicode support
CONFIG_NLS
  This is required by the FAT based filesystems and by the ISO9660
  filesystem with Joliet support.  Joliet is a Microsoft extension
  for CDROMs that supports Unicode.
  This allows translation between different character sets.  When
  dealing with the FAT based filesystems, there are two character
  sets that are important. The first is the codepage.  Codepages are
  character sets that are used by DOS to allow filenames to have
  native language characters when character sets were limited to
  256 characters. The codepage is the character set that is used to
  store native language characters on disk.
  The two most common codepages are 437 in the United States and 850
  in much of Europe. The second important character set is the
  input/output character set. This is the character set that is
  displayed on the screen. In the United States, this will almost
  always be the ISO 8859-1 character set. This is the default. Linux
  will only do a translation of the FAT filenames, not the contents
  of the files.

nls iso8859-1
CONFIG_NLS_ISO8859_1
  ISO8859-1 is the Latin 1 character set, and it covers most West
  European languages such as Albanian, Catalan, Danish, Dutch,
  English, Faeroese, Finnish, French, German, Galician, Irish,
  Icelandic, Italian, Norwegian, Portuguese, Spanish, Swedish, and
  Valencian.

nls iso8859-2
CONFIG_NLS_ISO8859_2
  ISO8859-2 is the Latin 2 character set, and it works for most
  Latin-written Slavic and Central European languages: Czech, German,
  Hungarian, Polish, Rumanian, Croatian, Slovak, Slovene.

nls iso8859-3
CONFIG_NLS_ISO8859_3
  ISO8859-3 is the Latin 3 character set, and it s popular with
  authors of Esperanto, Galician, Maltese, and Turkish.

nls iso8859-4
CONFIG_NLS_ISO8859_4
  ISO8859-4 is the Latin 4 character set, and it introduces letters
  for Estonian, Latvian, and Lithuanian. It is an incomplete
  predecessor of Latin 6.

nls iso8859-5
CONFIG_NLS_ISO8859_5
  ISO8859-5 is a Cyrillic character set, and you can type Bulgarian,
  Byelorussian, Macedonian, Russian, Serbian, and Ukrainian.
  Note that the charset KOI8-R is preferred in Russia.

nls iso8859-6
CONFIG_NLS_ISO8859_6
  ISO8859-6 is the Arabic character set.

nls iso8859-7
CONFIG_NLS_ISO8859_7
  ISO8859-7 is the Modern Greek character set.

nls iso8859-8
CONFIG_NLS_ISO8859_8
  ISO8859-8 is the Hebrew character set.

nls iso8859-9
CONFIG_NLS_ISO8859_9
  ISO8859-9 is the Latin 5 character set, and it replaces the rarely
  needed Icelandic letters in Latin 1 with the Turkish ones.
  Useful in Turkey.

nls iso8859-10
CONFIG_NLS_ISO8859_10
  ISO8859-10 is the Latin 6 character set, and it adds the last
  Inuit (Greenlandic) and Sami (Lappish) letters that were missing
  in Latin 4 to cover the entire Nordic area.

nls koi8-r
CONFIG_NLS_KOI8_R
  This is the preferred Russian character set.

nls codepage 437
CONFIG_NLS_CODEPAGE_437
  This is the DOS codepage that is used in the United States and parts
  of Canada.

nls codepage 737
CONFIG_NLS_CODEPAGE_737
  This is the codepage used by DOS for Greek.

nls codepage 775
CONFIG_NLS_CODEPAGE_775
  This is the codepage used by DOS for the Baltic Rim Languages.

nls codepage 850
CONFIG_NLS_CODEPAGE_850
  This is the DOS codepage that is used in much of Europe -- United
  Kingdom, Germany, Spain, Italy, and [add more countries here].
  It has some characters useful to many European languages that are
  not part of codepage 437.

nls codepage 852
CONFIG_NLS_CODEPAGE_852
  This is the Latin 2 codepage used by DOS for much of Central and
  Eastern Europe.  It has all the required characters for these
  languages: Albanian, Croatian, Czech, English, Finnish, Hungarian,
  Irish, German, Polish, Romanian, Serbian (Latin transcription),
  Slovak, Slovenian, and Sorbian.

nls codepage 855
CONFIG_NLS_CODEPAGE_855
  This is the DOS codepage that is used for Cyrillic.

nls codepage 857
CONFIG_NLS_CODEPAGE_857
  This is the DOS codepage that is used for Turkish.

nls codepage 860
CONFIG_NLS_CODEPAGE_860
  This is the DOS codepage that is used for Portuguese.

nls codepage 861
CONFIG_NLS_CODEPAGE_861
  This is the DOS codepage that is used for Icelandic.

nls codepage 862
CONFIG_NLS_CODEPAGE_862
  This is the DOS codepage that is used for Hebrew.

nls codepage 863
CONFIG_NLS_CODEPAGE_863
  This is the DOS codepage that is used for Canadian French.

nls codepage 864
CONFIG_NLS_CODEPAGE_864
  This is the DOS codepage that is used for Arabic.

nls codepage 865
CONFIG_NLS_CODEPAGE_865
  This is the DOS codepage that is used in the Nordic European
  countries.

nls codepage 866
CONFIG_NLS_CODEPAGE_866
  This is the DOS codepage that is used for Cyrillic/Russian.

nls codepage 869
CONFIG_NLS_CODEPAGE_869
  This is the DOS codepage that is used for Greek.

nls codepage 874
CONFIG_NLS_CODEPAGE_874
  This is the DOS codepage that is used for Thai.

/proc filesystem support
CONFIG_PROC_FS
  This is a virtual filesystem providing information about the status
  of the system. "Virtual" means that it doesn't take up any space on
  your hard disk: the files are created on the fly when you access
  them. Also, you cannot read the files with less: you need to use
  more or cat. The filesystem is explained in the Kernel Hacker's
  Guide, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/LDP and also on the proc(8) manpage
  ("man 8 proc").  This option will enlarge your kernel by about 18
  kB. It's totally cool; for example, "cat /proc/interrupts" gives
  information about what the different IRQs are used for at the moment
  (there is a small number of Interrupt ReQuest lines in your computer
  that are used by the periphery to gain the CPU's attention -- often
  a source of trouble if two devices are mistakenly configured to use
  the same IRQ). Several programs depend on this, so everyone should
  say Y here.

NFS filesystem support
CONFIG_NFS_FS
  If you are connected to some other (usually local) Unix computer
  (using SLIP, PLIP, PPP or Ethernet) and want to mount files
  residing on that computer (the NFS server) using the Network
  File Sharing protocol, say Y. "Mounting files" means that the client
  can access the files with usual UNIX commands as if they were
  sitting on the client's hard disk. For this to work, the server must
  run the programs nfsd and mountd (but does not need to have NFS
  filesystem support enabled). NFS is explained in the Network
  Administrator's Guide, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/LDP, and on its man page: "man nfs".
  There is also a NFS-FAQ in sunsite.unc.edu:/pub/Linux/docs/faqs
  which presumes that you know the basics of NFS already. If you say Y
  here, you should have said Y to TCP/IP networking also. This option
  would enlarge your kernel by about 27 kB. This filesystem is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.
  If you configure a diskless machine which will mount its root
  filesystem over NFS, you cannot compile this driver as a module.
  If you don't know what all this is about, say N.

Root file system on NFS
CONFIG_ROOT_NFS
  If you want your Linux box to mount its whole root filesystem from
  some other computer over the net via NFS (presumably because your
  box doesn't have a hard disk), say Y. Read Documentation/nfsroot.txt
  for details. Most people say N here.

BOOTP support
CONFIG_RNFS_BOOTP
  If you want your Linux box to mount its whole root filesystem from
  some other computer over the net via NFS and you want the IP address
  of your computer to be discovered automatically at boot time using
  the BOOTP protocol (a special protocol designed for doing this job),
  say Y here. In case the boot ROM of your network card was designed
  for booting Linux and does BOOTP itself, providing all necessary
  information on the kernel command line, you can say N here.  If
  unsure, say Y. Note that in case you want to use BOOTP, a BOOTP
  server must be operating on your network. Read
  Documentation/nfsroot.txt for details.

RARP support
CONFIG_RNFS_RARP
  If you want your Linux box to mount its whole root filesystem from
  some other computer over the net via NFS and you want the IP address
  of your computer to be discovered automatically at boot time using
  the RARP protocol (an older protocol which is being obsoleted by
  BOOTP), say Y here. Note that in case you want to use RARP, a RARP
  server must be operating on your network. Read
  Documentation/nfsroot.txt for details.

ISO9660 cdrom filesystem support
CONFIG_ISO9660_FS
  This is the standard filesystem used on CDROMs. It was previously
  known as "High Sierra Filesystem" and is called "hsfs" on other Unix
  systems. The so-called Rock-Ridge extensions which allow for long
  Unix filenames are also supported by this driver. If you have a
  CDROM drive and want to do more with it than just listen to audio
  CDs and watch its LEDs, say Y (and read the CDROM-HOWTO, available
  via FTP (user: anonymous) from sunsite.unc.edu:
  /pub/Linux/docs/HOWTO), thereby enlarging your kernel by about
  27 kB; otherwise say N. If you want to compile this as a module
  ( = code which can be inserted in and removed from the running
  kernel whenever you want), say M here and read
  Documentation/modules.txt.

OS/2 HPFS filesystem support (read only)
CONFIG_HPFS_FS
  OS/2 is IBM's operating system for PC's, the same as Warp, and HPFS
  is the filesystem used for organizing files on OS/2 hard disk
  partitions. Say Y if you want to be able to read files from an OS/2
  HPFS partition of your hard drive. OS/2 floppies however are in
  regular MSDOS format, so you don't need this option in order to be
  able to read them. Read Documentation/filesystems/hpfs.txt. This
  filesystem is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you
  want). If you want to compile it as a module, say M here and read
  Documentation/modules.txt. If unsure, say N.

System V and Coherent filesystem support
CONFIG_SYSV_FS
  SCO, Xenix and Coherent are commercial Unix systems for Intel
  machines. Enabling this option would allow you to read and write to
  and from their floppies and hard disk partitions. If you have a
  floppy or hard disk partition like that, it is probable that they
  contain binaries from those other Unix systems; in order to run
  these binaries, you will want to install iBCS2 (iBCS2 [Intel Binary
  Compatibility Standard] is a kernel module which lets you run SCO,
  Xenix, Wyse, Unix Ware, Dell Unix and System V programs under Linux
  and is often needed to run commercial software, most prominently
  WordPerfect. It's in tsx-11.mit.edu:/pub/linux/BETA). If you only
  intend to mount files from some other Unix over the network using
  NFS, you don't need the System V filesystem support (but you need
  NFS filesystem support obviously). Note that this option is
  generally not needed for floppies, since a good portable way to
  transport files and directories between unixes (and even other
  operating systems) is given by the tar program ("man tar").  Note
  also that this option has nothing whatsoever to do with the option
  "System V IPC". Read about the System V filesystem in
  Documentation/filesystems/sysv-fs.txt. This option will enlarge your
  kernel by about 34 kB. If you want to compile this as a module ( =
  code which can be inserted in and removed from the running kernel
  whenever you want), say M here and read Documentation/modules.txt.
  If you haven't heard about all of this before, it's safe to say N.

Kernel automounter support (experimental)
CONFIG_AUTOFS_FS
  The automounter is a tool to automatically mount remote filesystems
  on demand.  This implementation is partially kernel-based to reduce
  overhead in the already-mounted case; this is unlike the BSD
  automounter (amd), which is only in user space.  To use the
  automounter you also need the user-space tools from
  ftp.kernel.org:/pub/linux/daemons/autofs.  If you are not a part of
  a fairly large, distributed network, you probably do not need an
  automounter, and can say N here.

BSD UFS filesystem support (read only)
CONFIG_UFS_FS
  BSD and derivate versions of Unix (such as SunOS, FreeBSD, NetBSD
  and NeXTstep) use a filesystem called UFS. Some System V Unixes can
  create and mount partitions and diskettes using this filesystem
  as well. Enabling this option allows you to mount these partitions
  and diskettes read-only. If you only intend to mount files from
  some other Unix over the network using NFS, you don't need the
  UFS filesystem support (but you need NFS filesystem support
  obviously). Note that this option is generally not needed for
  floppies, since a good portable way to transport files and
  directories between unixes (and even other operating systems)
  is given by the tar program ("man tar"). When accessing NeXTstep
  files, you may need to convert them from the NeXT character set
  to the Latin1 character set; use GNU recode for this purpose.
  Say Y to build UFS support into your kernel. If you want to compile
  this as a module ( = code which can be inserted in and removed from
  the running kernel whenever you want), say M here and read
  Documentation/modules.txt. If you haven't heard about all of this
  before, it's safe to say N.

BSD disklabel (FreeBSD partition tables) support
CONFIG_BSD_DISKLABEL
  FreeBSD uses its own partition scheme on your PC. It requires only
  one entry in the primary partition table of your disk and manages it
  similarly to DOS extended partitions, putting in its first sector a
  new partition table in disklabel format. Enabling this option allows
  you to read these disklabels and further mount FreeBSD partitions on
  your Linux box if you also have configured BSD ufs filesystem
  support. If you don't know what all this is about, say N.

SMD disklabel (Sun partition tables) support
CONFIG_SMD_DISKLABEL
  Like most systems, SunOS uses its own partition table format,
  incompatible with all others.  Enabling this option allows you to
  read these partition tables and further mount SunOS disks on your
  Linux box if you also have configured BSD ufs filesystem support.
  This is mainly used to carry data from a SPARC under SunOS to your
  Linux box via a removable medium like magneto-optical or ZIP drives.
  If you don't know what all this is about, say N.

SMB filesystem support (to mount WfW shares etc...)
CONFIG_SMB_FS
  SMB (Server Message Buffer) is the protocol Windows for Workgroups
  (WfW), Windows NT and Lan Manager use to talk to each other over an
  Ethernet. Enabling this allows you to mount their filesystems and
  access them just like any other unix directory. For details, read
  Documentation/filesystems/smbfs.txt.  Note: if you just want your
  box to act as an SMB *server* and make files and printing services
  available to Windows clients (which need to have a TCP/IP stack),
  you don't need to enable this filesystem support; you can use the
  program samba (available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/system/Network/samba) for that. General
  information about how to connect Linux, Windows machines and Macs is
  on the WWW at http://eats.com/linux_mac_win.html (to browse the WWW,
  you need to have access to a machine on the Internet that has one of
  the programs lynx, netscape or Mosaic).  If you want to compile the
  SMB support as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt. Most people say N, however.

SMB Win95 bug work-around
CONFIG_SMB_WIN95
  If you want to connect to a share exported by Windows 95, you should
  say Y here. The Windows 95 server contains a bug that makes listing
  directories unreliable. This option slows down the listing of
  directories. This makes the Windows 95 server a bit more stable.

NCP filesystem support (to mount NetWare volumes)
CONFIG_NCP_FS
  NCP (NetWare Core Protocol) is a protocol that runs over IPX and is
  used by Novell NetWare clients to talk to file servers. It is to IPX
  what NFS is to TCP/IP, if that helps. Saying Y here allows you to
  mount NetWare file server volumes and to access them just like any
  other Unix directory. For details, please read the file
  Documentation/filesystems/ncpfs.txt in the kernel source and the
  IPX-HOWTO on ftp://sunsite.unc.edu:/pub/Linux/docs/howto.
  You do not have to say Y here if you want your Linux box to act as a
  file *server* for Novell NetWare clients.
  General information about how to connect Linux, Windows machines and
  Macs is on the WWW at http://www.eats.com/linux_mac_win.html (to
  browse the WWW, you need to have access to a machine on the Internet
  that has a program like lynx or netscape).
  If you want to compile this as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want),
  say M here and read Documentation/modules.txt. The module will be
  called ncpfs.o. Say N unless you are connected to a Novell network.

Packet signatures
CONFIG_NCPFS_PACKET_SIGNING
  NCP allows packets to be signed for stronger security. If you want
  security, say Y. Normal users can leave it off. To be able to use
  packet signing you must use ncpfs > 2.0.12.

Proprietary file locking
CONFIG_NCPFS_IOCTL_LOCKING
  Allows locking of records on remote volumes. Say N unless you have
  special applications which are able to utilize this locking scheme.

Clear remove/delete inhibit when needed
CONFIG_NCPFS_STRONG
  Allows manipulation of files flagged as Delete or Rename Inhibit. To
  use this feature you must mount volumes with the ncpmount parameter
  "-s" (ncpfs-2.0.12 and newer). Say Y unless you are not mounting
  volumes with -f 444.

Use NFS namespace when available
CONFIG_NCPFS_NFS_NS
  Allows you to utilize NFS namespace on NetWare servers. It brings
  you case sensitive filenames. Say Y. You can disable it at
  mount-time with the `-N nfs' parameter of ncpmount.

Use OS2/LONG namespace when available
CONFIG_NCPFS_OS2_NS
  Allows you to utilize OS2/LONG namespace on NetWare servers.
  Filenames in this namespace are limited to 255 characters, they are
  case insensitive, and case in names is preserved. Say Y. You can
  disable it at mount time with the -N os2 parameter of ncpmount.

Allow mounting of volume subdirectories
CONFIG_NCPFS_MOUNT_SUBDIR
  Allows you to mount not only whole servers or whole volumes, but
  also subdirectories from a volume. It can be used to reexport data
  and so on. There is no reason to say N, so Y is recommended unless
  you count every byte.
  To utilize this feature you must use ncpfs-2.0.12 or newer.

Amiga FFS filesystem support (EXPERIMENTAL)
CONFIG_AFFS_FS
  The Fast File System (FFS) is the common filesystem used on
  hard disks by Amiga (tm) Systems since AmigaOS Version 1.3 (34.20).
  It's also possible to mount diskfiles used by
  the Un*X Amiga Emulator by Bernd Schmidt
  (http://www-users.informatik.rwth-aachen.de/~crux/uae.html).
  If you want to do the latter, you will also need the loop device
  support.   Say Y if you want to be able to read and write files from
  and to an Amiga FFS partition of your hard drive.  Amiga floppies
  however cannot be read with this driver due to an incompatibility of
  the floppy controller used in an Amiga and the standard floppy
  controller in PCs and workstations.  Read
  Documentation/filesystems/affs.txt.  This filesystem is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.
  If unsure, say N.

Standard/generic serial support
CONFIG_SERIAL
  This selects whether you want to include the driver for the standard
  serial ports.  People who might say N here are those that are
  setting up dedicated Ethernet WWW/FTP servers, or users that have
  one of the various bus mice instead of a serial mouse.  (Note that
  the Cyclades and Stallion multi serial port drivers do not need this
  driver built in for them to work. They are completely independent of
  each other.)  If you want to compile this driver as a module, say M
  here and read Documentation/modules.txt.  [WARNING: Do not compile
  this driver as a module if you are using non-standard serial ports,
  since the configuration information will be lost when kerneld
  automatically unloads the driver.  This limitation may be lifted in
  the future.]  Most people will say Y or M here, so that they can use
  serial mice, modems and similar devices connecting to the standard
  serial ports.

Digiboard PC/Xx Support
CONFIG_DIGI
  This is a driver for the Digiboard PC/Xe, PC/Xi, and PC/Xeve cards
  that give you many serial ports. You would need something like this
  to connect more than two modems to your Linux box, for instance in
  order to become a BBS. If you have a card like that, say Y here and
  read the file Documentation/digiboard.txt.

SDL RISCom/8 card support
CONFIG_RISCOM8
  This is a driver for the SDL Communications RISCom/8 multiport card,
  that give you many serial ports. You would need something like this
  to connect more than two modems to your Linux box, for instance in
  order to become a BBS. If you have a card like that, say Y here and
  read the file Documentation/riscom8.txt. Also it's possible to say
  M here and compile this driver as kernel loadable module.

Specialix IO8+ card support
CONFIG_SPECIALIX
  This is a driver for the Specialix IO8+ multiport card (both the
  ISA and the PCI version), that gives you 8 serial ports. You would 
  need a card like this to connect more than two modems to your linux 
  box, for instance in order to become a BBS. If you have a card like 
  that, say Y here and read the file Documentation/specialix.txt. Also 
  it's possible to say M here and compile this driver as kernel 
  loadable module.

Specialix DTR/RTS pin is RTS
CONFIG_SPECIALIX_RTSCTS
  The Specialix card can only support either RTS or DTR. When this
  option is off, the driver will use the pin as "DTR" when the tty is
  in software handshake mode. When this option is on or hardware 
  handshake is on, it will always be RTS. Read the file 
  Documentation/specialix.txt for more information. 

Cyclades async mux support
CONFIG_CYCLADES
  This is a driver for a card that gives you many serial ports. You
  would need something like this to connect more than two modems to
  your Linux box, for instance in order to become a BBS. If you want
  to compile this as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt. If you haven't heard about it, it's
  safe to say N. (As of 1.3.9x kernels, this driver's minor numbers
  start at 0 instead of 32.)

Stallion multiport serial support
CONFIG_STALDRV
  Stallion cards give you many serial ports. You would need something
  like this to connect more than two modems to your Linux box, for
  instance in order to become a BBS. If you say Y here, you will be
  asked for your specific card model in the next questions. Make sure
  to read drivers/char/README.stallion in this case. If you have never
  heard about all this, it's safe to say N.

Stallion EasyIO or EC8/32 support
CONFIG_STALLION n
  If you have an EasyIO or EasyConnection 8/32 multiport Stallion
  card, then this is for you; say Y. Make sure to read
  drivers/char/README.stallion. If you want to compile this as a
  module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt.

Stallion EC8/64, ONboard, Brumby support
CONFIG_ISTALLION
  If you have an EasyConnection 8/64, ONboard, Brumby or Stallion
  serial multiport card, say Y here. Make sure to read
  drivers/char/README.stallion. To compile it as a module ( = code
  which can be inserted in and removed from the running kernel
  whenever you want), say M here and read Documentation/modules.txt.

Parallel printer support
CONFIG_PRINTER
  If you intend to attach a printer to the parallel port of your Linux
  box (as opposed to using a serial printer; if the connector at the
  printer has 9 or 25 holes ["female"], then it's serial), say Y. Also
  read the Printing-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt. If you want to use both a parallel
  printer and PLIP, there are two cases: 1) If the printer and the
  PLIP cable are to use the same parallel port (presumably because you
  have just one), it is best to compile both drivers as modules and
  load and unload them as needed. 2) To use different parallel ports
  for the printer and the PLIP cable, you can say Y to this printer
  driver, specify the base address of the parallel port(s) to use for
  the printer(s) with the "lp" kernel command line option. (See the
  documentation of your boot loader (lilo or loadlin) about how to
  pass options to the kernel at boot time. The lilo procedure is also
  explained in the SCSI-HOWTO, available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.) The standard base addresses
  as well as the syntax of the "lp" command line option can be found
  in drivers/char/lp.c. You can then say Y to the PLIP driver or,
  preferably, M in which case Documentation/networking/net-modules.txt
  tells you how to specify the port and IRQ to be used by PLIP at
  module load time.


Mouse Support (not serial mice)
CONFIG_MOUSE
  This is for machines with a bus mouse or a PS/2 mouse as opposed to
  a serial mouse. Most people have a regular serial MouseSystem or
  Microsoft mouse (made by Logitech) that plugs into a COM port
  (rectangular with 9 or 25 pins). These people say N here. If you
  have something else, read the Busmouse-HOWTO, available via FTP
  (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO and say Y
  here. If you have a laptop, you either have to check the
  documentation or experiment a bit to find out whether the trackball
  is a serial mouse or not; it's best to say Y here for you. Note that
  the answer to this question won't directly affect the kernel:
  saying N will just cause this configure script to skip all the
  questions about non-serial mice.  If unsure, say Y.

Logitech busmouse support
CONFIG_BUSMOUSE
  Logitech mouse connected to a proprietary interface card. It's
  generally a round connector with 9 pins. Note that the newer mice
  made by Logitech don't use the Logitech protocol anymore; for those,
  you don't need this option. You want to read the Busmouse-HOWTO,
  available via FTP (user: anonymous) in
  sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt. If you are unsure, say N and read the
  HOWTO nevertheless: it will tell you what you have.

PS/2 mouse (aka "auxiliary device") support
CONFIG_PSMOUSE
  The PS/2 mouse connects to a special mouse port that looks much like
  the keyboard port (small circular connector with 6 pins). This way,
  the mouse does not use any serial ports. This port can also be used
  for other input devices like light pens, tablets, keypads. Compaq,
  AST and IBM all use this as their mouse port on currently shipping
  machines. The trackballs of some laptops are PS/2 mice also. In
  particular, the C&T 82C710 mouse on TI Travelmates is a PS/2
  mouse. Although PS/2 mice are not technically bus mice, they are
  explained in detail in the Busmouse-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to
  compile this as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt. If you are unsure, say N and read
  the HOWTO nevertheless: it will tell you what you have.

C&T 82C710 mouse port support (as on TI Travelmate)
CONFIG_82C710_MOUSE
  This is a certain kind of PS/2 mouse used on the TI Travelmate. If
  you are unsure, try first to say N here and come back if the mouse
  doesn't work. Read the Busmouse-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.

Microsoft busmouse support
CONFIG_MS_BUSMOUSE
  These animals (also called Inport mice) are connected to an
  expansion board using a round connector with 9 pins. If this is what
  you have, say Y and read the Busmouse-HOWTO, available via FTP
  (user: anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you
  want to compile this as a module ( = code which can be inserted in
  and removed from the running kernel whenever you want), say M here
  and read Documentation/modules.txt. If you are unsure, say N and
  read the HOWTO nevertheless: it will tell you what you have. Also be
  aware that several vendors talk about 'Microsoft busmouse' and
  actually mean PS/2 busmouse -- so count the pins on the connector.

ATIXL busmouse support
CONFIG_ATIXL_BUSMOUSE
  This is a rare type of busmouse that is connected to the back of an
  ATI video card. Note that most ATI mice are actually Microsoft
  busmice. Read the Busmouse-HOWTO, available via FTP (user:
  anonymous) in sunsite.unc.edu:/pub/Linux/docs/HOWTO.  If you want to
  compile this as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt. If you are unsure, say N and read
  the HOWTO nevertheless: it will tell you what you have.

Support for user miscellaneous modules
CONFIG_UMISC
  This option forces generic miscellaneous minor device support in the
  kernel, and allows later loading of user miscellaneous device
  modules, such as drivers for optic pens and touchscreens. Unless you
  need such specific modules, or are willing to write/test one, just
  say N.

QIC-02 tape support
CONFIG_QIC02_TAPE
  If you have a non-SCSI tape drive like that, say Y.

Do you want runtime configuration for QIC-02
CONFIG_QIC02_DYNCONF
  You can either configure this driver once and for all by editing a
  header file, in which case you should say N, or you can fetch a
  program via anonymous FTP which is able to configure this driver
  during runtime. If you want this, say Y.

Ftape (QIC-80/Travan) support
CONFIG_FTAPE
  If you have a tape drive that is connected to your floppy
  controller, say Y here. Some tape drives (like the Iomega Ditto
  3200) come with a high speed controller of its own.  These drives
  (and their companion controller) is also supported. If you have a
  special controller (such as the CMS FC-10, FC-20, Iomega Mach-II, or
  Ditto Dash), you must configure it by editing the file
  drivers/char/ftape/Makefile. If you want to use such a tape drive on
  a PCI-bus based system, please read the file
  drivers/char/ftape/README.PCI. This driver is also available as a
  runtime loadable module ( = code which can be inserted in and
  removed from the running kernel whenever you want). If you want to
  compile it as a module, say M here and read
  Documentation/modules.txt.

Zilog serial support
CONFIG_SUN_ZS
  This driver does not exist at this point, so you might as well
  say N.

Advanced Power Management
CONFIG_APM
  APM is a BIOS specification for saving power using several different
  techniques.  This is mostly useful for battery powered laptops with
  APM compliant BIOSes.  Specifically, the time will be reset after a
  USER RESUME operation, the /proc/apm device will provide battery
  status information, and user-space programs will receive
  notification of APM "events" (e.g., battery status change).  This
  driver does not spin down disk drives (see hdparm(8) for that); and
  it doesn't turn off VESA-compliant "green" monitors.  This driver
  does not support the TI 4000M TravelMate and the ACER 486/DX4/75
  because they don't have compliant BIOSes.  Many "green" desktop
  machines also don't have compliant BIOSes, and this driver will
  cause those machines to panic during the boot phase (typically,
  these machines are using a data segment of 0040, which is reserved
  for the Linux kernel). If you get random kernel OOPSes that don't
  seem to be related to anything and you have a motherboard with APM
  support, try disabling/enabling this option. Generally, if you don't
  have a battery in your machine, there isn't much point in using this
  driver.

Ignore USER SUSPEND
CONFIG_APM_IGNORE_USER_SUSPEND
  This option will ignore USER SUSPEND requests.  On machines with a
  compliant APM BIOS, you want to say N.  However, on the NEC Versa M
  series notebooks, it is necessary to say Y because of a BIOS bug.

Enable APM at boot time
CONFIG_APM_DO_ENABLE
  Enable APM features at boot time.  From page 36 of the APM BIOS
  specification: "When disabled, the APM BIOS does not automatically
  power manage devices, enter the Standby State, enter the Suspend
  State, or take power saving steps in response to CPU Idle calls."
  This driver will make CPU Idle calls when Linux is idle (unless this
  feature is turned off -- see below).  This should always save
  battery power, but more complicated APM features will be dependent
  on your BIOS implementation.  You may need to turn this option off
  if your computer hangs at boot time when using APM support, or if it
  beeps continuously instead of suspending.  Turn this off if you have
  a NEC UltraLite Versa 33/C or a Toshiba T400CDT.  This is off by
  default since most machines do fine without this feature.

Do CPU IDLE calls
CONFIG_APM_CPU_IDLE
  Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
  On some machines, this can activate improved power savings, such as
  a slowed CPU clock rate, when the machine is idle.  These idle calls
  are made after the idle loop has run for some length of time (e.g.,
  333 ms).  On some machines, this will cause a hang at boot time or
  whenever the CPU becomes idle.  (On machines with more than one CPU,
  this option does nothing.)

Enable console blanking using APM
CONFIG_APM_DISPLAY_BLANK
  Enable console blanking using the APM.  Some laptops can use this to
  turn off the LCD backlight when the VC screen blanker blanks the
  screen.  Note that this is only used by the VC screen blanker, and
  won't turn off the backlight when using X11 (this also doesn't have
  anything to do with your VESA-compliant power-saving monitor).
  Further, this option doesn't work for all laptops -- it might not
  turn off your backlight at all, or it might print a lot of errors to
  the console, especially if you are using gpm.

Power off on shutdown
CONFIG_APM_POWER_OFF
  This option will power off the computer after the Linux kernel is
  halted (e.g., with the halt(8) command).  As with the other APM
  options, this option may not work reliably with some APM BIOS
  implementations.

Ignore multiple suspend/standby events
CONFIG_APM_IGNORE_MULTIPLE_SUSPEND
  This option is necessary on the Thinkpad 560, but should work on all
  other laptops. When the APM BIOS returns multiple suspend or standby
  events while one is already being processed they will be ignored.
  Without this the Thinkpad 560 has troubles with apmd, and pcmcia-cs.

Watchdog Timer Support
CONFIG_WATCHDOG
  If you enable this option and create a character special file
  /dev/watchdog with major number 10 and minor number 130 using mknod
  ("man mknod"), you will get a watchdog, i.e.: subsequently opening
  the file and failing to write to it for longer than 1 minute will
  result in rebooting the machine. This could be useful for a
  networked machine that needs to come back online as fast as possible
  after a lock-up. There's a watchdog implementation entirely in
  software (which can sometimes fail to reboot the machine) and a
  driver for hardware watchdog boards, which are more robust and can
  also keep track of the temperature inside your computer. For
  details, read Documentation/watchdog.txt in the kernel source. If
  unsure, say N. This driver is also available as a module ( = code
  which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read Documentation/modules.txt.

Disable watchdog shutdown on close
CONFIG_WATCHDOG_NOWAYOUT
  The default watchdog behaviour is to stop the timer if the process
  managing it closes the file /dev/watchdog. It's always remotely
  possible that this process might get killed. If you enable this
  option, the watchdog cannot be stopped once it has been started.

WDT Watchdog timer
CONFIG_WDT
  If you have a WDT500P or WDT501P watchdog board, say Y here,
  otherwise N. It is not possible to probe for this board, which means
  that you have to set the IO port and IRQ it uses in the kernel
  source at the top of drivers/char/wdt.c. If you want to compile this
  as a module ( = code which can be inserted in and removed from the
  running kernel whenever you want), say M here and read
  Documentation/modules.txt.

WDT501 features
CONFIG_WDT_501
  Saying Y here and creating a character special file /dev/temperature
  with major number 10 and minor number 131 ("man mknod") will give
  you a thermometer inside your computer: reading from
  /dev/temperature yields one byte, the temperature in degrees
  Fahrenheit. This works only if you have a WDT501P watchdog board
  installed.

Fan Tachometer
CONFIG_WDT_501_FAN
  Enable the Fan Tachometer on the WDT501. Only do this if you have
  a fan tachometer actually set up.

Software Watchdog
CONFIG_SOFT_WATCHDOG
  A software monitoring watchdog. This will fail to reboot your system
  from some situations that the hardware watchdog will recover
  from. Equally it's a lot cheaper to install. This driver is also
  available as a module ( = code which can be inserted in and removed
  from the running kernel whenever you want). If you want to compile
  it as a module, say M here and read Documentation/modules.txt.

Berkshire Products PC Watchdog card
CONFIG_PCWATCHDOG
  This is the driver for the Berkshire Products PC Watchdog card.
  This card simply watches your kernel to make sure it doesn't freeze,
  and if it does, it resets your computer after a certain amount of
  time.  This driver is like the WDT501 driver but for different
  hardware. The PC watchdog cards can be ordered from
  http://www.berkprod.com. Some example rc.local files are available
  from ftp.bitgate.com. This driver is also available as a module ( =
  code which can be inserted in and removed from the running kernel
  whenever you want). If you want to compile it as a module, say M
  here and read Documentation/modules.txt.  Most people will say N.

Enhanced Real Time Clock Support
CONFIG_RTC
  If you enable this option and create a character special file
  /dev/rtc with major number 10 and minor number 135 using mknod ("man
  mknod"), you will get access to the real time clock built into your
  computer. Every PC has such a clock built in. It can be used to
  generate signals from as low as 1Hz up to 8192Hz, and can also be
  used as a 24 hour alarm.  It reports status information via the file
  /proc/rtc and its behaviour is set by various ioctls on /dev/rtc.
  People running SMP ( = multiprocessor) versions of Linux should
  enable this option to read and set the RTC clock in a SMP compatible
  fashion. If you think you have a use for such a device (such as
  periodic data sampling), then say Y here, and go read the file
  Documentation/rtc.txt for details.

Sound card support
CONFIG_SOUND
  If you have a Sound Card in your Computer, i.e. if it can say more
  than an occasional beep, say Y. Be sure to have all the information
  about your sound card and its configuration down (I/O port,
  interrupt and DMA channel), because you will be asked for it. You
  want to read the Sound-HOWTO, available via FTP (user: anonymous)
  from sunsite.unc.edu:/pub/Linux/docs/HOWTO. There is also some
  information in various README files in drivers/sound.  If you want
  to compile this as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M here and
  read Documentation/modules.txt.
  I'm told that even without a sound card, you can make your computer
  say more than an occasional beep, by programming the PC speaker.
  Kernel patches and programs to do that are at sunsite.unc.edu:
  /pub/Linux/kernel/patches/console/pcsndrv-X.X.tar.gz,
  to be extracted with "tar xzvf filename".

ProAudioSpectrum 16 support
CONFIG_PAS
  Answer Y only if you have a Pro Audio Spectrum 16, ProAudio Studio
  16 or Logitech SoundMan 16.  Don't answer 'y' if you have some other
  card made by Media Vision or Logitech since they are not PAS16
  compatible.

SoundBlaster (SB, SBPro, SB16, clones) support
CONFIG_SB
  Answer "y" if you have an original SoundBlaster card made by
  Creative Labs or a 100% hardware compatible clone (like the
  Thunderboard or SM Games). If your card was in the list of supported
  cards look at the card specific instructions in the
  drivers/sound/Readme.cards file before answering this question. For
  an unknown card you may answer Y if the card claims to be
  SoundBlaster compatible.

Generic OPL2/OPL3 FM synthesizer support
CONFIG_ADLIB
  Answer Y if your card has a FM chip made by Yamaha (OPL2/OPL3/OPL4).
  Answering Y is usually a safe and recommended choice, however some
  cards may have software (TSR) FM emulation. Enabling FM support with
  these cards may cause trouble (I don't currently know of any such
  cards, however).

Gravis Ultrasound support
CONFIG_GUS
  Enable this option for any type of Gravis Ultrasound card, including
  the GUS or GUS MAX.

MPU-401 support (NOT for SB16)
CONFIG_MPU401
  Be careful with this question. The MPU401 interface is supported by
  all sound cards. However, some natively supported cards have their
  own driver for MPU401. Enabling the MPU401 option with these cards
  will cause a conflict. Also, enabling MPU401 on a system that
  doesn't really have a MPU401 could cause some trouble. If your card
  was in the list of supported cards, look at the card specific
  instructions in the drivers/sound/Readme.cards file. It's safe to
  answer Y if you have a true MPU401 MIDI interface card.

6850 UART Midi support
CONFIG_UART6850
  This option enables support for MIDI interfaces based on the 6850
  UART chip. This interface is rarely found on sound cards.  It's safe
  to answer N to this question.

PSS (ECHO-ADI2111) support
CONFIG_PSS
  Answer Y only if you have Orchid SW32, Cardinal DSP16 or some other
  card based on the PSS chipset (AD1848 codec + ADSP-2115 DSP chip +
  Echo ESC614 ASIC CHIP).

16 bit sampling option of GUS (_NOT_ GUS MAX)
CONFIG_GUS16
  Answer Y if you have installed the 16 bit sampling daughtercard on
  your GUS.  Answer N if you have a GUS MAX, since enabling this
  option disables GUS MAX support.

GUS MAX support
CONFIG_GUSMAX
  Answer Y only if you have a Gravis Ultrasound MAX.

Microsoft Sound System support
CONFIG_MSS
  Again think carefully before answering Y to this question.  It's
  safe to answer Y if you have the original Windows Sound System card
  made by Microsoft or Aztech SG 16 Pro (or NX16 Pro).  Also you may
  answer Y in case your card is NOT among these:
     ATI Stereo F/X, AdLib, Audio Excell DSP16, Cardinal DSP16,
     Ensoniq SoundScape (and compatibles made by Reveal and Spea),
     Gravis Ultrasound, Gravis Ultrasound ACE, Gravis Ultrasound Max,
     Gravis Ultrasound with 16 bit option, Logitech Sound Man 16,
     Logitech SoundMan Games, Logitech SoundMan Wave, MAD16 Pro (OPTi
     82C929), Media Vision Jazz16, MediaTriX AudioTriX Pro, Microsoft
     Windows Sound System (MSS/WSS), Mozart (OAK OTI-601), Orchid
     SW32, Personal Sound System (PSS), Pro Audio Spectrum 16, Pro
     Audio Studio 16, Pro Sonic 16, Roland MPU-401 MIDI interface,
     Sound Blaster 1.0, Sound Blaster 16, Sound Blaster 16ASP, Sound
     Blaster 2.0, Sound Blaster AWE32, Sound Blaster Pro, TI TM4000M
     notebook, ThunderBoard, Turtle Beach Tropez, Yamaha FM
     synthesizers (OPL2, OPL3 and OPL4), 6850 UART MIDI Interface.
  For cards having native support in VoxWare, consult the card
  specific instructions in drivers/sound/Readme.cards. Some drivers
  have their own MSS support and enabling this option will cause a
  conflict.

Ensoniq Soundscape support
CONFIG_SSCAPE
  Answer Y if you have a sound card based on the Ensoniq SoundScape
  chipset. Such cards are being manufactured at least by Ensoniq, Spea
  and Reveal (Reveal makes also other cards).

MediaTriX AudioTriX Pro support
CONFIG_TRIX
  Answer Y if you have the AudioTriX Pro sound card manufactured
  by MediaTrix.

Support for MAD16 and/or Mozart based cards
CONFIG_MAD16
  Answer Y if your card has a Mozart (OAK OTI-601) or MAD16
  (OPTi 82C928 or 82C929) audio interface chip. These chips are
  currently quite common so it's possible that many no-name cards
  have one of them. In addition the MAD16 chip is used in some
  cards made by known manufacturers such as Turtle Beach (Tropez),
  Reveal (some models) and Diamond (latest ones).

Support for Crystal CS4232 based (PnP) cards
CONFIG_CS4232
  Enable this if you have a card based on the Crystal CS4232 chip set.

Support for Turtle Beach Wave Front (Maui, Tropez) synthesizers
CONFIG_MAUI
  Enable this option if you have a Turtle Beach Wave Front, Maui, or
  Tropez sound card.

/dev/dsp and /dev/audio support
CONFIG_AUDIO
  Answering N disables /dev/dsp and /dev/audio, the A/D and D/A
  converter devices.  Answer N only if you know you will not need
  the option.  They are usually required.  Answer Y.

MIDI interface support
CONFIG_MIDI
  Answering N disables /dev/midixx devices and access to any MIDI
  ports using /dev/sequencer and /dev/music. This option also affects
  any MPU401 and/or General MIDI compatible devices.  Answer Y.

FM synthesizer (YM3812/OPL-3) support
CONFIG_YM3812
  Answer Y here, unless you know you will not need the option.

Sun Audio support
CONFIG_SUN_AUDIO
  This is support for the sound cards on Sun workstations. The code
  does not exist yet, so you might as well say N here.

Kernel profiling support
CONFIG_PROFILE
  This is for kernel hackers who want to know how much time the kernel
  spends in the various procedures. The information is stored in
  /proc/profile (enable the /proc filesystem!) and in order to read
  it, you need the readprofile package from sunsite.unc.edu. Its
  manpage gives information regarding the format of profiling data. To
  become a kernel hacker, you can start with the Kernel Hacker's
  Guide, available via FTP (user: anonymous) from
  sunsite.unc.edu:/pub/Linux/docs/LDP. Mere mortals say N.

Profile shift count
CONFIG_PROFILE_SHIFT
  This is used to adjust the granularity with which the addresses of
  executed instructions get recorded in /proc/profile. But since you
  enabled "Kernel profiling support", you must be a kernel hacker and
  hence you know what this is about :-)

ISDN subsystem
CONFIG_ISDN
  ISDN ("Integrated Services Digital Networks", called RNIS in
  France) is a special type of fully digital telephone line; it's
  mostly used to connect to your Internet service provider (with SLIP
  or PPP). The main advantage is that the speed is higher than
  ordinary modem/telephone connections. It only works if your computer
  is equipped with an ISDN card and both you and your service provider
  purchased an ISDN line from your phone company.  For details, read
  http://alumni.caltech.edu/~dank/isdn/ on the WWW. (To browse the
  WWW, you need to have access to a machine on the Internet that has
  one of the programs lynx, netscape or Mosaic.)  This driver allows
  you to use an ISDN-card for networking connections and as dialin/out
  device. The isdn-tty's have a built in AT-compatible modem
  emulator. Network devices support autodial, channel-bundling,
  callback and caller-authentication without having a daemon
  running. A reduced T.70 protocol is supported with tty's suitable
  for German BTX. On D-Channel, the protocols EDSS1 and 1TR6 are
  supported. See Documentation/isdn/README for more information.

Support synchronous PPP
CONFIG_ISDN_PPP
  This enables synchronous PPP via ISDN. This protocol is used by
  Cisco or Sun for example. So you want say Y here if the other end of
  your ISDN connection supports it. You will need a special version of
  pppd (called ipppd) for using this feature. See
  Documentation/isdn/README.syncppp and Documentation/isdn/syncPPP.FAQ
  for more information.

Support generic MP (RFC 1717)
CONFIG_ISDN_MPP
  With synchronous PPP enabled, it is possible to increase throughput
  by bundling several ISDN-connections, using this protocol.
  See Documentation/isdn/README.syncppp for more information.

Use VJ-compression with synchronous PPP
CONFIG_ISDN_PPP_VJ
  This enables Van Jacobson header compression for synchronous PPP.

Support audio via ISDN
CONFIG_ISDN_AUDIO
  With this option enabled, the modem-emulator supports a subset
  of the EIA Class 8 Voice commands. Using a getty with voice-support
  (mgetty+sendfax by gert@greenie.muc.de with an extension, available
  with the ISDN utility package for example), you will be able
  to use your Linux box as an ISDN-answering machine. Of course, this
  must be supported by the lowlevel driver also. Currently HiSax
  driver is the only voice-supporting drivers. See
  Documentation/isdn/README.audio for more information.

ICN 2B and 4B support
CONFIG_ISDN_DRV_ICN
  This enables support for two kinds of ISDN-cards made by a German
  company called ICN. 2B is the standard version for a single ISDN
  line with two B-channels, 4B supports two ISDN lines. For running
  this card, additional firmware is necessary, which has to be
  downloaded into the card using a utility which is distributed
  separately.  See Documentation/isdn/README and README.icn for more
  information.

HiSax SiemensChipSet driver support
CONFIG_ISDN_DRV_HISAX
  This driver replaces the old Teles driver. It supports the Siemens
  chipset in a more general way. This chipset is used on various
  ISDN-cards (like AVM A1, Elsa ISDN cards, Teles S0-16.0,
  Teles S0-16.3, Teles S0-8, Teles/Creatix PnP, ITK micro ix1 and
  many compatibles). It supports other chipsets too.
  See Documentation/isdn/README.HiSax for further informations on
  using this driver.

HiSax Support for EURO/DSS1
CONFIG_HISAX_EURO
  Enable this if you have a EURO ISDN line.

Support for german chargeinfo
CONFIG_DE_AOC
  If you have german AOC, you can enable this to get the charginfo.

Disable sending complete
CONFIG_HISAX_NO_SENDCOMPLETE
  If you have trouble with some ugly exchanges or you live in
  Australia select this option.

Disable sending low layer compatibility
CONFIG_HISAX_NO_LLC
  If you have trouble with some ugly exchanges try to select this
  option.

HiSax Support for german 1TR6
CONFIG_HISAX_1TR6
  Enable this if you have a old german 1TR6 line.
  Note: Many older local switches are using 1TR6 on internal S0.

HiSax Support for Teles 16.0/8.0
CONFIG_HISAX_16_0
  This enables HiSax support for the Teles ISDN-cards S0-16.0,
  S0-8 and many compatibles.
  See Documentation/isdn/README.HiSax on how to configure it using the
  different cards, a different D-channel protocol, or non-standard
  IRQ/port/shmem settings.

HiSax Support for Teles 16.3 or PNP or PCMCIA
CONFIG_HISAX_16_3
  This enables HiSax support for the Teles ISDN-cards S0-16.3
  the Teles/Creatix PnP and the Teles PCMCIA.
  See Documentation/isdn/README.HiSax on how to configure it using the
  different cards, a different D-channel protocol, or non-standard
  IRQ/port settings.

HiSax Support for Teles 16.3c
CONFIG_HISAX_TELES3C
  This enables HiSax support for the Teles 16.3c PnP.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for Teles PCI
CONFIG_HISAX_TELESPCI
  This enables HiSax support for the Teles PCI.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for Teles S0Box
CONFIG_HISAX_S0BOX
  This enables HiSax support for the Teles/Creatix parallel port
  S0BOX.  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for AVM A1 (Fritz)
CONFIG_HISAX_AVM_A1
  This enables HiSax support for the AVM A1 (aka "Fritz!").
  See Documentation/isdn/README.HiSax on how to configure it using the
  different cards, a different D-channel protocol, or non-standard
  IRQ/port settings.

HiSax Support for AVM PnP/PCI (Fritz!PNP/PCI)
CONFIG_HISAX_FRITZPCI
  This enables HiSax support for the AVM "Fritz!PnP" and "Fritz!PCI".
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for AVM A1 PCMCIA (Fritz)
CONFIG_HISAX_AVM_A1_PCMCIA
  This enables HiSax support for the AVM A1 "Fritz!PCMCIA").
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for Elsa ISA cards
CONFIG_HISAX_ELSA
  This enables HiSax support for all Elsa cards.
  See Documentation/isdn/README.HiSax on how to configure it using the
  different cards, a different D-channel protocol, or non-standard
  IRQ/port settings.


HiSax Support for ITK ix1-micro Revision 2
CONFIG_HISAX_IX1MICROR2
  This enables HiSax support for the ITK ix1-micro Revision 2 card.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for Eicon.Diehl Diva cards
CONFIG_HISAX_DIEHLDIVA
  This enables HiSax support for all none Pro versions of
  Eicon.Diehl's Diva series passiv cards.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for ASUSCOM cards
CONFIG_HISAX_ASUSCOM
  This enables HiSax support for all passiv AsusCom and AsusComs OEM cards,
  e.g PCBIT-DP, Dynalink and much more.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for TELEINT cards
CONFIG_HISAX_TELEINT
  This enables HiSax support for TeleInts semi-activ card and for
  other HFC-2BS0 based cards.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for Sedlbauer cards
CONFIG_HISAX_SEDLBAUER
  This enables HiSax support for all Sedlbauer passiv cards such as
  Sedlbauer Speed Card (Speed Win, Teledat 100), Speed Star
  and Speed Star2 (PCMCIA), ISDN-Controller PC/104, Speed PCI and
  Speed Fax+.
  
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for USR Sportster internal TA
CONFIG_HISAX_SPORTSTER
  This enables HiSax support for the USR (3Com) Sportster internal TA
  passiv card.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for MIC card
CONFIG_HISAX_MIC
  This enables HiSax support for the MIC passiv card.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for NETjet card
CONFIG_HISAX_NETJET
  This enables HiSax support for the NetJet PCI and maybe for other
  Tiger300 based passiv cards.
  See Documentation/isdn/README.HiSax on how to configure it.

HiSax Support for Niccy PnP/PCI card
CONFIG_HISAX_NICCY
  This enables HiSax support for Dr. Neuhaus (Sagem) Niccy series
  passiv cards.
  See Documentation/isdn/README.HiSax on how to configure it.

PCBIT-D support
CONFIG_ISDN_DRV_PCBIT
  This enables support for the PCBIT ISDN-cards. This card is
  manufactured in Portugal by Octal. For running this card, additional
  firmware is necessary, which has to be downloaded into the card
  using a utility which is distributed separately.
  See Documentation/isdn/README and Documentation/isdn/README.pcbit
  for more information.

Spellcaster support (EXPERIMENTAL)
CONFIG_ISDN_DRV_SC
  This enables support for the Spellcaster BRI boards. This driver
  currently builds in a modularized version only.
  See Documentation/isdn/README.sc and http://www.spellcast.com
  for more information.

AVM-B1 with CAPI2.0 support
CONFIG_ISDN_DRV_AVMB1
  This enables support for the AVM B1 card and also adds a CAPI2.0
  interface for this card. For running this card, additional firmware
  is necessary, which has to be downloaded into the card using a
  utility which is distributed separately.
  See Documentation/isdn/README.avmb1 for more information.

Support for AP1000 multicomputer
CONFIG_AP1000
  This enables support for a SPARC based parallel multi-computer
  called an AP1000+. For details on our efforts to port Linux to this
  machine see http://cap.anu.edu.au/cap/projects/linux or mail to
  hackers@cafe.anu.edu.au

SPARC ESP SCSI support
CONFIG_SCSI_SUNESP
  This is the driver for the Sun ESP SCSI host adapter. The ESP
  chipset is present in most SPARC-based computers.

SPARC /dev/openprom compatibility driver
CONFIG_SUN_OPENPROMIO
  This driver provides user programs with an interface to the SPARC
  PROM device tree. The driver implements a SunOS-compatible
  interface and a NetBSD-compatible interface. If you want to
  compile this as a module ( = code which can be inserted in and
  removed from the running kernel whenever you want), say M and read
  Documentation/modules.txt. If unsure, say Y.

Handle buggy SMP BIOSes with bad MTRR setup
CONFIG_MTRR
  Some BIOSes for MP1.1/MP1.4 SMP machines fail to set the MTRR
  registers in the chips up correctly as the specification and Intel
  rules require. If you have a PPro or later SMP and one or more CPU's
  report a value of about 2-3 bogomips enable this.

Nemory configuration
CONFIG_MEM_STD
  There are three memory configurations available. The standard
  configuration allows use of just under 1GB of RAM with 3GB of
  virtual space per process. The enterprise configuration allows
  2Gigabytes of physical memory but limits the per process address
  space to 2Gigabytes. The custom option allows you to specify the
  split subject to kernel constraints. If you don't know how it works
  don't pick it.

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