apm – Advanced Power Management 1.2 BIOS interface|
bind –a #P /dev |
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.