3 apm \- Advanced Power Management 1.2 BIOS interface
11 This device presents a low-level interface to
12 the APM 1.2 bios calls.
13 It is enabled by adding the line
17 (The value after the equals sign is ignored; the presence of
18 the line at all enables the driver.)
19 It is only available on uniprocessor PCs.
22 structure and then reading it back executes an APM call:
23 the written registers are passed to the call,
24 and the read registers are those returned by the call.
26 .\" In addition, the following strings may be
29 .\" to negotiate with other kernel devices about
30 .\" suspension of the system.
33 .\" Poll kernel devices for objections to suspending the system.
34 .\" The write succeeds only when no device objected.
37 .\" Notify kernel devices that the vote failed and the
38 .\" suspension will not happen.
40 .\" .B "commit suspend
41 .\" Notify kernel devices that the vote succeeded and
42 .\" suspension will happen. The devices
43 .\" may take measures such as disabling PCMCIA cards.
45 .\" .B "resume suspend
46 .\" Notify kernel devices that the system has come back
47 .\" after a suspension.
48 .\" The devices may take measures such as reenabling PCMCIA cards.
50 .\" A similar set of messages governs entrance into
54 This device is intended to enable more user-friendly
58 .B /sys/src/9/pc/apm.c
60 .B /sys/src/9/pc/apmjump.s