APM(3)APM(3)NAMEapm - 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. 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