Expects: AX    5308H
BX    ffffH
CX    request code: 0000H=disable power management
0001H=enable power management
Returns: AH    APM error code (if CF=CY)
Info: This function lets you disable or enable all power management
power-down functionality.

When disabled, the BIOS will not power-down devices, or enter the
stand-by or suspend state or take power-saving steps in response
to CPU Idle calls (INT 15H 5305H).

You may access this service via INT 15H or by using the APM entry
address obtained via INT 15H 5302H or INT 15H 5303H (protected
mode connect).

See Also: APM API
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INT 15H 5308H: Enable/Disable Power Management