NAME
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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. Writing 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
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/sys/src/9/pc/apm.c /sys/src/9/pc/apmjump.s |