apm man page on Plan9

apm man page on Plan9

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APM(3)									APM(3)

NAME
       apm - Advanced Power Management 1.2 BIOS interface

SYNOPSIS
       bind -a #P /dev

       /dev/apm

DESCRIPTION
       This  device  presents a low-level interface to the APM 1.2 bios calls.
       It is enabled by adding the line ``apm0='' to  plan9.ini.   (The	 value
       after  the  equals  sign	 is  ignored;  the presence of the line at all
       enables the driver.)  It is only available on uniprocessor PCs.	 Writ‐
       ing a 386 Ureg structure and then reading it back executes an APM call:
       the written registers are passed to the call, and  the  read  registers
       are those returned by the call.

       This device is intended to enable more user-friendly interfaces such as
       apm(8).

SOURCE
       /sys/src/9/pc/apm.c
       /sys/src/9/pc/apmjump.s

									APM(3)

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