arch/ppc/Config.help

CONFIG_SMP
  This enables support for systems with more than one CPU. If you have
  a system with only one CPU, like most personal computers, say N. If
  you have a system with more than one CPU, say Y.

  If you say N here, the kernel will run on single and multiprocessor
  machines, but will use only one CPU of a multiprocessor machine. If
  you say Y here, the kernel will run on many, but not all,
  singleprocessor machines. On a singleprocessor machine, the kernel
  will run faster if you say N here.

  Note that if you say Y here and choose architecture "586" or
  "Pentium" under "Processor family", the kernel will not work on 486
  architectures. Similarly, multiprocessor kernels for the "PPro"
  architecture may not work on all Pentium based boards.

  People using multiprocessor machines who say Y here should also say
  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
  Management" code will be disabled if you say Y here.

  See also the <file:Documentation/smp.tex>,
  <file:Documentation/smp.txt>, <file:Documentation/i386/IO-APIC.txt>,
  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  <http://www.linuxdoc.org/docs.html#howto>.

  If you don't know what to do here, say N.

CONFIG_PPC
  The PowerPC is a very capable 32-bit RISC processor from Motorola,
  the successor to their 68000 and 88000 series.  It powers recent
  Macintoshes and also a widely-used series of single-board computers
  from Motorola.  The Linux PowerPC port has a home page at
  <http://penguinppc.org/>.

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 don't have a math coprocessor, you need to say Y here; if you
  say Y here 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. Try "man bootparam" or see the documentation of your boot
  loader (lilo or loadlin) about how to pass options to the kernel at
  boot time.) 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 the Linux math coprocessor
  emulation can be found in <file:arch/i386/math-emu/README>.

  If you are not sure, say Y; apart from resulting in a 66 KB bigger
  kernel, it won't hurt.

CONFIG_MAC_FLOPPY
  If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
  floppy controller, say Y here. Most commonly found in PowerMacs.

CONFIG_IDE
  If you say Y here, your kernel will be able to manage low cost mass
  storage units such as ATA/(E)IDE and ATAPI units. The most common
  cases are IDE hard drives and ATAPI CD-ROM drives.

  If your system is pure SCSI and doesn't use these interfaces, you
  can say N here.

  Integrated Disk Electronics (IDE aka ATA-1) is a connecting standard
  for mass storage units such as hard disks. It was designed by
  Western Digital and Compaq Computer in 1984. It was then named
  ST506. Quite a number of disks use the IDE interface.

  AT Attachment (ATA) is the superset of the IDE specifications.
  ST506 was also called ATA-1.

  Fast-IDE is ATA-2 (also named Fast ATA), Enhanced IDE (EIDE) is
  ATA-3. It provides support for larger disks (up to 8.4GB by means of
  the LBA standard), more disks (4 instead of 2) and for other mass
  storage units such as tapes and cdrom. UDMA/33 (aka UltraDMA/33) is
  ATA-4 and provides faster (and more CPU friendly) transfer modes
  than previous PIO (Programmed processor Input/Output) from previous
  ATA/IDE standards by means of fast DMA controllers.

  ATA Packet Interface (ATAPI) is a protocol used by EIDE tape and
  CD-ROM drives, similar in many respects to the SCSI protocol.

  SMART IDE (Self Monitoring, Analysis and Reporting Technology) was
  designed in order to prevent data corruption and disk crash by
  detecting pre hardware failure conditions (heat, access time, and
  the like...). Disks built since June 1995 may follow this standard.
  The kernel itself don't manage this; however there are quite a
  number of user programs such as smart that can query the status of
  SMART parameters disk.

  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 <file:Documentation/modules.txt>. The module
  will be called ide.o.

  For further information, please read <file:Documentation/ide.txt>.

  If unsure, say Y.

CONFIG_HEARTBEAT
  Use the power-on LED on your machine as a load meter.  The exact
  behavior is platform-dependent, but normally the flash frequency is
  a hyperbolic function of the 5-minute load average.

CONFIG_ISA
  Find out whether you have ISA slots on your motherboard.  ISA 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 PCI, EISA, MicroChannel
  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
  newer boards don't support it.  If you have ISA, say Y, otherwise N.

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.

  The PCI-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#howto>, contains valuable
  information about which PCI hardware does work under Linux and which
  doesn't.

CONFIG_PCI_QSPAN
  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.

  The PCI-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#howto>, contains valuable
  information about which PCI hardware does work under Linux and which
  doesn't.

CONFIG_MCA
  MicroChannel Architecture is found in some IBM PS/2 machines and
  laptops.  It is a bus system similar to PCI or ISA. See
  <file:Documentation/mca.txt> (and especially the web page given
  there) before attempting to build an MCA bus kernel.

CONFIG_EISA
  The Extended Industry Standard Architecture (EISA) bus was
  developed as an open alternative to the IBM MicroChannel bus.

  The EISA bus provided some of the features of the IBM MicroChannel
  bus while maintaining backward compatibility with cards made for
  the older ISA bus.  The EISA bus saw limited use between 1988 and
  1995 when it was made obsolete by the PCI bus.

  Say Y here if you are building a kernel for an EISA-based machine.

  Otherwise, say N.

CONFIG_HOTPLUG
  Say Y here if you want to plug devices into your computer while
  the system is running, and be able to use them quickly.  In many
  cases, the devices can likewise be unplugged at any time too.

  One well known example of this is PCMCIA- or PC-cards, credit-card
  size devices such as network cards, modems or hard drives which are
  plugged into slots found on all modern laptop computers.  Another
  example, used on modern desktops as well as laptops, is USB.

  Enable HOTPLUG and KMOD, and build a modular kernel.  Get agent
  software (at <http://linux-hotplug.sourceforge.net/>) and install it.
  Then your kernel will automatically call out to a user mode "policy
  agent" (/sbin/hotplug) to load modules and set up software needed
  to use devices as you hotplug them.

CONFIG_PCMCIA
  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
  computer.  These are credit-card size devices such as network cards,
  modems or hard drives often used with laptops computers.  There are
  actually two varieties of these cards: the older 16 bit PCMCIA cards
  and the newer 32 bit CardBus cards.  If you want to use CardBus
  cards, you need to say Y here and also to "CardBus support" below.

  To use your PC-cards, you will need supporting software from David
  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
  for location).  Please also read the PCMCIA-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#howto>.

  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  When compiled this way, there will be modules called pcmcia_core.o
  and ds.o.  If you want to compile it as a module, say M here and
  read <file:Documentation/modules.txt>.

CONFIG_KCORE_ELF
  If you enabled support for /proc file system then the file
  /proc/kcore will contain the kernel core image. This can be used
  in gdb:

  $ cd /usr/src/linux ; gdb vmlinux /proc/kcore

  You have two choices here: ELF and A.OUT. Selecting ELF will make
  /proc/kcore appear in ELF core format as defined by the Executable
  and Linking Format specification. Selecting A.OUT will choose the
  old "a.out" format which may be necessary for some old versions
  of binutils or on some architectures.

  This is especially useful if you have compiled the kernel with the
  "-g" option to preserve debugging information. It is mainly used
  for examining kernel data structures on the live kernel so if you
  don't understand what this means or are not a kernel hacker, just
  leave it at its default value ELF.

CONFIG_BINFMT_ELF
  ELF (Executable and Linkable Format) is a format for libraries and
  executables used across different architectures and operating
  systems. Saying Y here will enable your kernel to run ELF binaries
  and enlarge it by about 13 KB. ELF support under Linux has now all
  but replaced 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
  however) 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 contained in the ELF HOWTO available from
  <http://www.linuxdoc.org/docs.html#howto>.

  If you find that after upgrading from Linux kernel 1.2 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 <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 <file:Documentation/modules.txt>.  The module
  will be called binfmt_elf.o. Saying M or N here is dangerous because
  some crucial programs on your system might be in ELF format.

CONFIG_BINFMT_MISC
  If you say Y here, it will be possible to plug wrapper-driven binary
  formats into the kernel. You will like this especially when you use
  programs that need an interpreter to run like Java, Python or
  Emacs-Lisp. It's also useful if you often run DOS executables under
  the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#howto>). Once you have
  registered such a binary class with the kernel, you can start one of
  those programs simply by typing in its name at a shell prompt; Linux
  will automatically feed it to the correct interpreter.

  You can do other nice things, too. Read the file
  <file:Documentation/binfmt_misc.txt> to learn how to use this
  feature, and <file:Documentation/java.txt> for information about how
  to include Java support.

  You must say Y to "/proc file system support" (CONFIG_PROC_FS) to
  use this part of the kernel.

  You may say M here for module support and later load the module when
  you have use for it; the module is called binfmt_misc.o. If you
  don't know what to answer at this point, say Y.

CONFIG_VGA_CONSOLE
  Saying Y here will allow you to use Linux in text mode through a
  display that complies with the generic VGA standard. Virtually
  everyone wants that.

  The program SVGATextMode can be used to utilize SVGA video cards to
  their full potential in text mode. Download it from
  <ftp://ibiblio.org/pub/Linux/utils/console/>.

  Say Y.

CONFIG_IRQ_ALL_CPUS
  This option gives the kernel permission to distribute IRQs across
  multiple CPUs.  Saying N here will route all IRQs to the first
  CPU. Generally SMP PowerMacs can answer Y. SMP IBM CHRP boxes or
  Power3 boxes should say N for now.

CONFIG_FB
  The frame buffer device provides an abstraction for the graphics
  hardware. It represents the frame buffer of some video hardware and
  allows application software to access the graphics hardware through
  a well-defined interface, so the software doesn't need to know
  anything about the low-level (hardware register) stuff.

  Frame buffer devices work identically across the different
  architectures supported by Linux and make the implementation of
  application programs easier and more portable; at this point, an X
  server exists which uses the frame buffer device exclusively.
  On several non-X86 architectures, the frame buffer device is the
  only way to use the graphics hardware.

  The device is accessed through special device nodes, usually located
  in the /dev directory, i.e. /dev/fb*.

  You need an utility program called fbset to make full use of frame
  buffer devices. Please read <file:Documentation/fb/framebuffer.txt>
  and the Framebuffer-HOWTO at
  <http://www.tahallah.demon.co.uk/programming/prog.html> for more
  information.

  Say Y here and to the driver for your graphics board below if you
  are compiling a kernel for a non-x86 architecture.

  If you are compiling for the x86 architecture, you can say Y if you
  want to play with it, but it is not essential. Please note that
  running graphical applications that directly touch the hardware
  (e.g. an accelerated X server) and that are not frame buffer
  device-aware may cause unexpected results. If unsure, say N.

CONFIG_FB_COMPAT_XPMAC
  If you use the Xpmac X server (common with mklinux), you'll need to
  say Y here to use X. You should consider changing to XFree86 which
  includes a server that supports the frame buffer device directly
  (XF68_FBDev).

CONFIG_SCSI
  If you want to use a SCSI hard disk, SCSI tape drive, SCSI CD-ROM 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, also called SCSI controller),
  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 100 MB IOMEGA ZIP drive.

  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  The module will be called scsi_mod.o.  If you want to compile it as
  a module, say M here and read <file:Documentation/modules.txt> and
  <file:Documentation/scsi.txt>.  However, do not compile this as a
  module if your root file system (the one containing the directory /)
  is located on a SCSI device.

CONFIG_NETDEVICES
  You can say N here if you don't intend to connect your Linux box to
  any other computer at all or if all your connections will be over a
  telephone line with a modem either via UUCP (UUCP is a protocol to
  forward mail and news between unix hosts over telephone lines; read
  the UUCP-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#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
  <http://www.bart.nl/~patrickr/term-howto/Term-HOWTO.html>).

  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 (especially if you
  plan to use more than one network card under Linux)) or if you want
  to use SLIP (Serial Line Internet Protocol is the protocol used to
  send Internet traffic over telephone lines or null modem cables) or
  CSLIP (compressed SLIP) or PPP (Point to Point Protocol, a better
  and newer replacement for 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 amateur radio links).

  Make sure to read the NET-3-HOWTO. Eventually, you will have to read
  Olaf Kirch's excellent and free book "Network Administrator's
  Guide", to be found in <http://www.linuxdoc.org/docs.html#guide>. If
  unsure, say Y.

CONFIG_CD_NO_IDESCSI
  If you have a CD-ROM drive that is neither SCSI nor IDE/ATAPI, say Y
  here, otherwise N. Read the CD-ROM-HOWTO, available from
  <http://www.linuxdoc.org/docs.html#howto>.

  Note that the answer to this question doesn't directly affect the
  kernel: saying N will just cause the configurator to skip all
  the questions about these CD-ROM 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 drivers/cdrom/{driver_name}.h where you can define your
  interface parameters and switch some internal goodies.

  All these CD-ROM 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 <file:Documentation/modules.txt>.

  If you want to use any of these CD-ROM drivers, you also have to
  answer Y or M to "ISO 9660 CD-ROM file system support" below (this
  answer will get "defaulted" for you if you enable any of the Linux
  CD-ROM drivers).

CONFIG_INPUT_ADBHID
  Say Y here if you want to have ADB (Apple Desktop Bus) HID devices
  such as keyboards, mice, joysticks, or graphic tablets handled by
  the input layer.  If you say Y here, make sure to say Y to the
  corresponding drivers "Keyboard support" (CONFIG_INPUT_KEYBDEV),
  "Mouse Support" (CONFIG_INPUT_MOUSEDEV) and "Event interface
  support" (CONFIG_INPUT_EVDEV) as well.

  If you say N here, you still have the option of using the old ADB
  keyboard and mouse drivers.

  If unsure, say Y.

CONFIG_PREP_RESIDUAL
  Some PReP systems have residual data passed to the kernel by the
  firmware.  This allows detection of memory size, devices present and
  other useful pieces of information.  Sometimes this information is
  not present or incorrect.

  Unless you expect to boot on a PReP system, there is not need to
  select Y.

CONFIG_ADB
  Apple Desktop Bus (ADB) support is for support of devices which
  are connected to an ADB port.  ADB devices tend to have 4 pins.
  If you have an Apple Macintosh prior to the iMac, or a
  "Blue and White G3", you probably want to say Y here.  Otherwise
  say N.

CONFIG_ADB_CUDA
  This provides support for CUDA based Power Macintosh systems.  This
  includes most OldWorld PowerMacs, the first generation iMacs, the
  Blue&White G3 and the Yikes G4 (PCI Graphics).  All later models
  should use CONFIG_ADB_PMU instead.

  If unsure say Y.

CONFIG_ADB_PMU
  On the PowerBook 3400 and 2400, the PMU is a 6805 microprocessor
  core whose primary function is to control battery charging and
  system power.  The PMU also controls the ADB (Apple Desktop Bus)
  which connects to the keyboard and mouse, as well as the
  non-volatile RAM and the RTC (real time clock) chip.  Say Y to
  enable support for this device; you should do so if your machine
  is one of these PowerBooks.

CONFIG_ADB_MACIO
  Say Y here to include direct support for the ADB controller in the
  Hydra chip used on PowerPC Macintoshes of the CHRP type.  (The Hydra
  also includes a MESH II SCSI controller, DBDMA controller, VIA chip,
  OpenPIC controller and two RS422/Geoports.)

CONFIG_ADB_KEYBOARD
  This option allows you to use an ADB keyboard attached to your
  machine. Note that this disables any other (ie. PS/2) keyboard
  support, even if your machine is physically capable of using both at
  the same time.

  If you use an ADB keyboard (4 pin connector), say Y here.
  If you use a PS/2 keyboard (6 pin connector), say N here.

CONFIG_SERIAL_CONSOLE
  If you say Y here, it will be possible to use a serial port as the
  system console (the system console is the device which receives all
  kernel messages and warnings and which allows logins in single user
  mode). This could be useful if some terminal or printer is connected
  to that serial port.

  Even if you say Y here, the currently visible virtual console
  (/dev/tty0) will still be used as the system console by default, but
  you can alter that using a kernel command line option such as
  "console=ttyS1". (Try "man bootparam" or see the documentation of
  your boot loader (lilo or loadlin) about how to pass options to the
  kernel at boot time.)

  If you don't have a VGA card installed and you say Y here, the
  kernel will automatically use the first serial line, /dev/ttyS0, as
  system console.

  If unsure, say N.

CONFIG_MAC_SERIAL
  If you have Macintosh style serial ports (8 pin mini-DIN), say Y
  here. If you also have regular serial ports and enable the driver
  for them, you can't currently use the serial console feature.

CONFIG_BUSMOUSE
  Say Y here if your machine has a bus 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 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.

  This is the generic bus mouse driver code. If you have a bus mouse,
  you will have to say Y here and also to the specific driver for your
  mouse below.

  This code is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  The module will be called busmouse.o. If you want to compile it as a
  module, say M here and read <file:Documentation/modules.txt>.

CONFIG_MOUSE
  This is for machines with a mouse which is neither a serial nor a
  bus mouse. Examples are PS/2 mice (such as the track balls on some
  laptops) and some digitizer pads. 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 from
  <http://www.linuxdoc.org/docs.html#howto>. This HOWTO contains
  information about all non-serial mice, not just bus mice.

  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 the configurator to skip all
  the questions about non-serial mice. If unsure, say Y.

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 from
  <http://www.linuxdoc.org/docs.html#howto>. General information about
  the modular sound system is contained in the files
  <file:Documentation/sound/Introduction>.  The file
  <file:Documentation/sound/README.OSS> contains some slightly
  outdated but still useful information as well.

  If you have a PnP sound card and you want to configure it at boot
  time using the ISA PnP tools (read
  <http://www.roestock.demon.co.uk/isapnptools/>), then you need to
  compile the sound card support as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want)
  and load that module after the PnP configuration is finished.  To do
  this, say M here and read <file:Documentation/modules.txt> as well
  as <file:Documentation/sound/README.modules>; the module will be
  called soundcore.o.

  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 supporting utilities to do that are in the pcsp
  package, available at <ftp://ftp.infradead.org/pub/pcsp/>.

CONFIG_MAGIC_SYSRQ
  If you say Y here, you will have some control over the system even
  if the system crashes for example during kernel debugging (e.g., you
  will be able to flush the buffer cache to disk, reboot the system
  immediately or dump some status information). This is accomplished
  by pressing various keys while holding SysRq (Alt+PrintScreen). It
  also works on a serial console (on PC hardware at least), if you
  send a BREAK and then within 5 seconds a command keypress. The
  keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
  unless you really know what this hack does.

CONFIG_PROC_HARDWARE
  Say Y here to support the /proc/hardware file, which gives you
  access to information about the machine you're running on,
  including the model, CPU, MMU, clock speed, BogoMIPS rating,
  and memory size.

CONFIG_AMIGA
  This option enables support for the Amiga series of computers. If
  you plan to use this kernel on an Amiga, say Y here and browse the
  material available in <file:Documentation/m68k>; otherwise say N.

CONFIG_A2232
  This option supports the 2232 7-port serial card shipped with the
  Amiga 2000 and other Zorro-bus machines, dating from 1989.  At
  a max of 19,200 bps, the ports are served by a 6551 ACIA UART chip
  each, plus a 8520 CIA, and a master 6502 CPU and buffer as well. The
  ports were connected with 8 pin DIN connectors on the card bracket,
  for which 8 pin to DB25 adapters were supplied. The card also had
  jumpers internally to toggle various pinning configurations.

  This driver can be built as a module; but then "generic_serial.o"
  will also be built as a module. This has to be loaded before
  "ser_a2232.o". If you want to do this, answer M here and read
  "<file:Documentation/modules.txt>".

CONFIG_ZORRO
  This enables support for the Zorro bus in the Amiga. If you have
  expansion cards in your Amiga that conform to the Amiga
  AutoConfig(tm) specification, say Y, otherwise N. Note that even
  expansion cards that do not fit in the Zorro slots but fit in e.g.
  the CPU slot may fall in this category, so you have to say Y to let
  Linux use these.

CONFIG_AMIGA_PCMCIA
  Include support in the kernel for pcmcia on Amiga 1200 and Amiga
  600. If you intend to use pcmcia cards say Y; otherwise say N.

CONFIG_WHIPPET_SERIAL
  HiSoft has a web page at <http://www.hisoft.co.uk/>, but there
  is no listing for the Whippet in their Amiga section.

CONFIG_APNE
  If you have a PCMCIA NE2000 compatible adapter, say Y.  Otherwise,
  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). The module is called apne.o. If you want to compile it as a
  module, say M here and read <file:Documentation/modules.txt>.

CONFIG_AMIGAMOUSE
  If you want to be able to use an Amiga mouse in Linux, say Y.

  This driver is also available as a module ( = code which can be
  inserted in and removed from the running kernel whenever you want).
  The module is called amigamouse.o. If you want to compile it as a
  module, say M here and read <file:Documentation/modules.txt>.

CONFIG_BOOTX_TEXT
  Say Y here to see progress messages from the boot firmware in text
  mode. Requires either BootX or Open Firmware.

CONFIG_AMIGA_BUILTIN_SERIAL
  If you want to use your Amiga's built-in serial port in Linux,
  answer Y.

  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
  <file:Documentation/modules.txt>.

CONFIG_GVPIOEXT
  If you want to use a GVP IO-Extender serial card in Linux, say Y.
  Otherwise, say N.

CONFIG_GVPIOEXT_LP
  Say Y to enable driving a printer from the parallel port on your
  GVP IO-Extender card, N otherwise.

CONFIG_GVPIOEXT_PLIP
  Say Y to enable doing IP over the parallel port on your GVP
  IO-Extender card, N otherwise.

CONFIG_MULTIFACE_III_TTY
  If you want to use a Multiface III card's serial port in Linux,
  answer Y.

  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
  <file:Documentation/modules.txt>.

CONFIG_6xx
  There are four types of PowerPC chips supported.  The more common
  types (601, 603, 604, 740, 750, 7400), the Motorola embedded
  versions (821, 823, 850, 855, 860, 8260), the IBM embedded versions
  (403 and 405) and the high end 64 bit Power processors (Power 3,
  Power 4).  Unless you are building a kernel for one of the embedded
  processor systems, or a 64 bit IBM RS/6000, choose 6xx.  Note that
  the kernel runs in 32-bit mode even on 64-bit chips.  Also note that
  because the 82xx family has a 603e core, specific support for that
  chipset is asked later on.

CONFIG_8260
  The MPC8260 CPM (Communications Processor Module) is a typical
  embedded CPU made by Motorola.  Selecting this option means that
  you wish to build a kernel for a machine with specifically an 8260
  for a CPU.

  If in doubt, say N.

CONFIG_OAK
  Select Oak if you have an IBM 403GCX "Oak" Evaluation Board.

  Select Walnut if you have an IBM 405GP "Walnut" Evaluation Board.

  More information on these boards is available at:
  <http://www.chips.ibm.com/products/powerpc/tools/evk_pn.html#GCX>.

CONFIG_WALNUT
  Select Walnut if you have an IBM 405GP "Walnut" Evaluation Board.

CONFIG_PPC601_SYNC_FIX
  Some versions of the PPC601 (the first PowerPC chip) have bugs which
  mean that extra synchronization instructions are required near
  certain instructions, typically those that make major changes to the
  CPU state.  These extra instructions reduce performance slightly.
  If you say N here, these extra instructions will not be included,
  resulting in a kernel which will run faster but may not run at all
  on some systems with the PPC601 chip.

  If in doubt, say Y here.

CONFIG_ALL_PPC
  Linux currently supports several different kinds of PowerPC-based
  machines: Apple Power Macintoshes and clones (such as the Motorola
  Starmax series), PReP (PowerPC Reference Platform) machines (such
  as the Motorola PowerStacks, Motorola cPCI/VME embedded systems,
  and some IBM RS/6000 systems), CHRP (Common Hardware Reference
  Platform), and several embedded PowerPC systems containing 4xx, 6xx,
  7xx, 8xx, 74xx, and 82xx processors.  Currently, the default option
  is to build a kernel which works on the first three.

  Select PowerMac/PReP/MTX/CHRP if configuring for any of the above.

  Select Gemini if configuring for a Synergy Microsystems' Gemini
  series Single Board Computer.  More information is available at:
  <http://www.synergymicro.com/PressRel/97_10_15.html>.

  Select APUS if configuring for a PowerUP Amiga.  More information is
  available at: <http://linux-apus.sourceforge.net/>.

CONFIG_GEMINI
  Select Gemini if configuring for a Synergy Microsystems' Gemini
  series Single Board Computer.  More information is available at:
  <http://www.synergymicro.com/PressRel/97_10_15.html>.

CONFIG_APUS
  Select APUS if configuring for a PowerUP Amiga.
  More information is available at:
  <http://linux-apus.sourceforge.net/>.

CONFIG_ALTIVEC
  This option enables kernel support for the Altivec extensions to the
  PowerPC processor. The kernel currently supports saving and restoring
  altivec registers, and turning on the 'altivec enable' bit so user
  processes can execute altivec instructions.

  This option is only usefully if you have a processor that supports
  altivec (G4, otherwise known as 74xx series), but does not have
  any affect on a non-altivec cpu (it does, however add code to the
  kernel).

  If in doubt, say Y here.

CONFIG_TAU
  G3 and G4 processors have an on-chip temperature sensor called the
  'Thermal Assist Unit (TAU)', which, in theory, can measure the on-die
  temperature within 2-4 degrees Celsius. This option shows the current
  on-die temperature in /proc/cpuinfo if the cpu supports it.

  Unfortunately, on some chip revisions, this sensor is very inaccurate
  and in some cases, does not work at all, so don't assume the cpu
  temp is actually what /proc/cpuinfo says it is.

CONFIG_TAU_INT
  The TAU supports an interrupt driven mode which causes an interrupt
  whenever the temperature goes out of range. This is the fastest way
  to get notified the temp has exceeded a range. With this option off,
  a timer is used to re-check the temperature periodically.

  However, on some cpus it appears that the TAU interrupt hardware
  is buggy and can cause a situation which would lead unexplained hard
  lockups.

  Unless you are extending the TAU driver, or enjoy kernel/hardware
  debugging, leave this option off.

CONFIG_TAU_AVERAGE
  The TAU hardware can compare the temperature to an upper and lower bound.
  The default behavior is to show both the upper and lower bound in
  /proc/cpuinfo. If the range is large, the temperature is either changing
  a lot, or the TAU hardware is broken (likely on some G4's). If the range
  is small (around 4 degrees), the temperature is relatively stable.

CONFIG_PMAC_PBOOK
  This provides support for putting a PowerBook to sleep; it also
  enables media bay support.  Power management works on the
  PB2400/3400/3500, Wallstreet, Lombard, and Bronze PowerBook G3. You
  must get the power management daemon, pmud, to make it work and you
  must have the /dev/pmu device (see the pmud README).

  Get pmud from <ftp://ftp.samba.org/pub/ppclinux/pmud/>.

  If you have a PowerBook, you should say Y.

  You may also want to compile the dma sound driver as a module and
  have it autoloaded. The act of removing the module shuts down the
  sound hardware for more power savings.

CONFIG_PMAC_BACKLIGHT
  Say Y here to build in code to manage the LCD backlight on a
  Macintosh PowerBook.  With this code, the backlight will be turned
  on and off appropriately on power-management and lid-open/lid-closed
  events; also, the PowerBook button device will be enabled so you can
  change the screen brightness.

CONFIG_RPXLITE
  Single-board computers based around the PowerPC MPC8xx chips and
  intended for embedded applications.  The following types are
  supported:

  RPX-Lite:
    Embedded Planet RPX Lite. PC104 form-factor SBC based on the MPC823.

  RPX-Classic:
    Embedded Planet RPX Classic Low-fat. Credit-card-size SBC based on 
    the MPC 860

  BSE-IP: 
    Bright Star Engineering ip-Engine.

  TQM823L:
  TQM850L:
  TQM855L:
  TQM860L:
    MPC8xx based family of mini modules, half credit card size,
    up to 64 MB of RAM, 8 MB Flash, (Fast) Ethernet, 2 x serial ports,
    2 x CAN bus interface, ...
      Manufacturer: TQ Components, www.tq-group.de
      Date of Release: October (?) 1999
      End of Life: not yet :-)
      URL:
      - module: <http://www.denx.de/PDF/TQM8xxLHWM201.pdf>
      - starter kit: <http://www.denx.de/PDF/STK8xxLHWM201.pdf>
      - images: <http://www.denx.de/embedded-ppc-en.html>

  FPS850L:
    FingerPrint Sensor System (based on TQM850L)
      Manufacturer: IKENDI AG, <http://www.ikendi.com/>
      Date of Release: November 1999
      End of life: end 2000 ?
      URL: see TQM850L

  SPD823TS:
    MPC823 based board used in the "Tele Server" product
    Manufacturer: Speech Design, <http://www.speech-design.de/>
    Date of Release: Mid 2000 (?)
    End of life: -
    URL: <http://www.speech-design.de/>
         select "English", then "Teleteam Solutions", then "TeleServer"

  IVMS8:
    MPC860 based board used in the "Integrated Voice Mail System",
    Small Version (8 voice channels)
    Manufacturer: Speech Design, <http://www.speech-design.de/>
    Date of Release: December 2000 (?)
    End of life: -
    URL: <http://www.speech-design.de/>

  IVML24:
    MPC860 based board used in the "Integrated Voice Mail System", 
    Large Version (24 voice channels)
    Manufacturer: Speech Design, <http://www.speech-design.de/>
    Date of Release: March 2001  (?)
    End of life: -
    URL: <http://www.speech-design.de/>

  SM850:
    Service Module (based on TQM850L)
    Manufacturer: Dependable Computer Systems, <http://www.decomsys.com/>
    Date of Release: end 2000 (?)
    End of life: mid 2001 (?)
    URL: <http://www.tz-mikroelektronik.de/ServiceModule/index.html>

  HERMES:
    Hermes-Pro ISDN/LAN router with integrated 8 x hub
    Manufacturer: Multidata Gesellschaft für Datentechnik und Informatik
      <http://www.multidata.de/>
    Date of Release: 2000 (?)
    End of life: -
    URL: <http://www.multidata.de/english/products/hpro.htm>

  IP860:	
    VMEBus IP (Industry Pack) carrier board with MPC860
    Manufacturer: MicroSys GmbH, <http://www.microsys.de/>
    Date of Release: ?
    End of life: -
    URL: <http://www.microsys.de/html/ip860.html>

  PCU_E:
    PCU = Peripheral Controller Unit, Extended
    Manufacturer: Siemens AG, ICN (Information and Communication Networks)
    	<http://www.siemens.de/page/1,3771,224315-1-999_2_226207-0,00.html>
    Date of Release: April 2001
    End of life: August 2001
    URL: n. a.

CONFIG_RPXCLASSIC
  The RPX-Classic is a single-board computer based on the Motorola
  MPC860.  It features 16MB of DRAM and a variable amount of flash,
  I2C EEPROM, thermal monitoring, a PCMCIA slot, a DIP switch and two
  LEDs.  Variants with Ethernet ports exist.  Say Y here to support it
  directly.

CONFIG_BSEIP
  Say Y here to support the Bright Star Engineering ipEngine SBC.
  This is a credit-card-sized device featuring a MPC823 processor,
  26MB DRAM, 4MB flash, Ethernet, a 16K-gate FPGA, USB, an LCD/video
  controller, and two RS232 ports.

CONFIG_TQM823L
  Say Y here to support the TQM823L, one of an MPC8xx-based family of
  mini SBCs (half credit-card size) from TQ Components first released
  in late 1999.  Technical references are at
  <http://www.denx.de/PDF/TQM8xxLHWM201.pdf>, and
  <http://www.denx.de/PDF/STK8xxLHWM201.pdf>, and an image at
  <http://www.denx.de/embedded-ppc-en.html>.

CONFIG_TQM850L
  Say Y here to support the TQM850L, one of an MPC8xx-based family of
  mini SBCs (half credit-card size) from TQ Components first released
  in late 1999.  Technical references are at
  <http://www.denx.de/PDF/TQM8xxLHWM201.pdf>, and
  <http://www.denx.de/PDF/STK8xxLHWM201.pdf>, and an image at
  <http://www.denx.de/embedded-ppc-en.html>.

CONFIG_TQM855L
  Say Y here to support the TQM855L, one of an MPC8xx-based family of
  mini SBCs (half credit-card size) from TQ Components first released
  in late 1999.  Technical references are at
  <http://www.denx.de/PDF/TQM8xxLHWM201.pdf>, and
  <http://www.denx.de/PDF/STK8xxLHWM201.pdf>, and an image at
  <http://www.denx.de/embedded-ppc-en.html>.

CONFIG_TQM860L
  Say Y here to support the TQM860L, one of an MPC8xx-based family of
  mini SBCs (half credit-card size) from TQ Components first released
  in late 1999.  Technical references are at
  <http://www.denx.de/PDF/TQM8xxLHWM201.pdf>, and
  <http://www.denx.de/PDF/STK8xxLHWM201.pdf>, and an image at
  <http://www.denx.de/embedded-ppc-en.html>.

CONFIG_TQM860
  Say Y here to support the TQM860, one of an MPC8xx-based family of
  SBCs (credit-card size) from TQ Components first released in 
  mid-1999 and discontinued mid-2000.

CONFIG_SM850
  Say Y here to support the Service Module 850 from Dependable
  Computer Systems, an SBC based on the TQM850L module by TQ
  Components.  This board is no longer in production.  The
  manufacturer's website is at <http://www.decomsys.com/>.

CONFIG_SPD823TS
  Say Y here to support the Speech Design 823 Tele-Server from Speech
  Design, released in 2000.  The manufacturer's website is at
  <http://www.speech-design.de/>.

CONFIG_IVMS8
  Say Y here to support the Integrated Voice-Mail Small 8-channel SBC
  from Speech Design, released March 2001.  The manufacturer's website
  is at <http://www.speech-design.de/>.

CONFIG_IVML24
  Say Y here to support the Integrated Voice-Mail Large 24-channel SBC
  from Speech Design, released March 2001.  The manufacturer's website
  is at <http://www.speech-design.de/>.

CONFIG_MBX
  MBX is a line of Motorola single-board computer based around the
  MPC821 and MPC860 processors, and intended for embedded-controller
  applications.  Say Y here to support these boards directly.

CONFIG_WINCEPT
  The Wincept 100/110 is a Motorola single-board computer based on the
  MPC821 PowerPC, introduced in 1998 and designed to be used in
  thin-client machines.  Say Y to support it directly.

CONFIG_EST8260
  EST8260:
    The EST8260 is a single-board computer manufactured by Wind River
    Systems, Inc. (formerly Embedded Support Tools Corp.) and based on
    the MPC8260.  Wind River Systems has a website at
    <http://www.windriver.com/>, but the EST8260 cannot be found on it
    and has probably been discontinued or rebadged.

  TQM8260:
    MPC8260 based module, little larger than credit card,
    up to 128 MB global + 64 MB local RAM, 32 MB Flash,
    32 kB EEPROM, 256 kB L@ Cache, 10baseT + 100baseT Ethernet,
    2 x serial ports, ...
      Manufacturer: TQ Components, www.tq-group.de
      Date of Release: June 2001
      End of Life: not yet :-)
      URL: <http://www.denx.de/PDF/TQM82xx_SPEC_Rev005.pdf>

  PM826:
    Modular system with MPC8260 CPU
    Manufacturer: MicroSys GmbH, <http://www.microsys.de/>
    Date of Release: mid 2001
    End of life: -
    URL: <http://www.microsys.de/html/pm826.html>

  CU824:
    VMEBus Board with PCI extension with MPC8240 CPU
    Manufacturer: MicroSys GmbH, http://www.microsys.de/
    Date of Release: early 2001 (?)
    End of life: -
    URL: <http://www.microsys.de/html/cu824.html>

CONFIG_MAC_ADBKEYCODES
  This provides support for sending raw ADB keycodes to console
  devices.  This is the default up to 2.4.0, but in future this may be
  phased out in favor of generic Linux keycodes.  If you say Y here,
  you can dynamically switch via the
      /proc/sys/dev/mac_hid/keyboard_sends_linux_keycodes
  sysctl and with the "keyboard_sends_linux_keycodes=" kernel
  argument.

  If unsure, say Y here.

CONFIG_MAC_EMUMOUSEBTN
  This provides generic support for emulating the 2nd and 3rd mouse
  button with keypresses.  If you say Y here, the emulation is still
  disabled by default.  The emulation is controlled by these sysctl
  entries:
      /proc/sys/dev/mac_hid/mouse_button_emulation
      /proc/sys/dev/mac_hid/mouse_button2_keycode
      /proc/sys/dev/mac_hid/mouse_button3_keycode

CONFIG_PPC_RTC
  If you say Y here 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 (or hardware clock) built
  into your computer.

  If unsure, say Y here.

CONFIG_PROC_DEVICETREE
  This option adds a device-tree directory under /proc which contains
  an image of the device tree that the kernel copies from Open
  Firmware. If unsure, say Y here.

CONFIG_PPC_RTAS
  When you use this option, you will be able to use RTAS from
  userspace.

  RTAS stands for RunTime Abstraction Services and should
  provide a portable way to access and set system information. This is
  commonly used on RS/6000 (pSeries) computers.

  You can access RTAS via the special proc file system entry rtas.
  Don't confuse this rtas entry with the one in /proc/device-tree/rtas
  which is readonly.

  If you don't know if you can use RTAS look into
  /proc/device-tree/rtas. If there are some entries, it is very likely
  that you will be able to use RTAS.

  You can do cool things with rtas. To print out information about
  various sensors in the system, just do a

    $ cat /proc/rtas/sensors

  or if you power off your machine at night but want it running when
  you enter your office at 7:45 am, do a

    # date -d 'tomorrow 7:30' +%s > /proc/rtas/poweron

  and shutdown.

  If unsure, say Y.

CONFIG_CMDLINE
  On some architectures (EBSA110 and CATS), there is currently no way
  for the boot loader to pass arguments to the kernel. For these
  architectures, you should supply some command-line options at build
  time by entering them here. As a minimum, you should specify the
  memory size and the root device (e.g., mem=64M root=/dev/nfs).

CONFIG_KGDB
  Include in-kernel hooks for kgdb, the Linux kernel source level
  debugger.  This project has a web page at
  <http://kgdb.sourceforge.net/>.

CONFIG_XMON
  Include in-kernel hooks for the xmon kernel monitor/debugger
  supported by the PPC port.