config.help

是关于linux2.5.1的完全源码

CONFIG_APM_RTC_IS_GMT
  Say Y here if your RTC (Real Time Clock a.k.a. hardware clock)
  stores the time in GMT (Greenwich Mean Time). Say N if your RTC
  stores localtime.

  It is in fact recommended to store GMT in your RTC, because then you
  don't have to worry about daylight savings time changes. The only
  reason not to use GMT in your RTC is if you also run a broken OS
  that doesn't understand GMT.

CONFIG_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.

  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/driver/rtc and its behaviour is set by various ioctls on
  /dev/rtc.

  If you run Linux on a multiprocessor machine and said Y to
  "Symmetric Multi Processing" above, you should say Y here to read
  and set the RTC in an SMP compatible fashion.

  If you think you have a use for such a device (such as periodic data
  sampling), then say Y here, and read <file:Documentation/rtc.txt>
  for details.

  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 rtc.o. If you want to compile it as a module,
  say M here and read <file:Documentation/modules.txt>.

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 <file:Documentation/modules.txt>. If unsure, say Y.

CONFIG_SUN_MOSTEK_RTC
  The Mostek RTC chip is used on all known Sun computers except
  some JavaStations. For a JavaStation you need to say Y both here
  and to "Enhanced Real Time Clock Support".

  Say Y here unless you are building a special purpose kernel.

CONFIG_OBP_FLASH
  The OpenBoot PROM on Ultra systems is flashable. If you want to be
  able to upgrade the OBP firmware, say Y here.

CONFIG_SUN_JSFLASH
  If you say Y here, you will be able to boot from your JavaStation's
  Flash memory.

CONFIG_SAB82532
  This driver supports the serial ports on newer (PCI) Ultra systems.
  Say Y if you want to be able to use your serial ports.

CONFIG_SUN_VIDEOPIX
  Say Y here to support the Videopix Frame Grabber from Sun
  Microsystems, commonly found on SPARCstations.  This card, which is
  based on the Phillips SAA9051, can handle NTSC and PAL/SECAM and
  SVIDEO signals.

CONFIG_SUN_BPP
  Say Y here to support Sun's obsolete variant of IEEE1284
  bidirectional parallel port protocol as /dev/bppX.  Can be built on
  x86 machines.

CONFIG_SUN_AURORA
  The Aurora Multiboard is a multi-port high-speed serial controller.
  If you have one of these, say Y.

CONFIG_TADPOLE_TS102_UCTRL
  Say Y here to directly support the TS102 Microcontroller interface
  on the Tadpole Sparcbook 3.  This device handles power-management
  events, and can also notice the attachment/detachment of external
  monitors and mice.