Category: power management

INT 15 - Advanced Power Management v1.0+ - ENABLE/DISABLE POWER MANAGEMENT

	AX = 5308h
	BX = device ID for all devices power-managed by APM
	    0001h (APM v1.1+)
	    FFFFh (APM v1.0)
	CX = new state
	    0000h disabled
	    0001h enabled
Return: CF clear if successful
	CF set on error
	    AH = error code (01h,03h,09h,0Ah,0Bh) (see #00473)
Notes:	when power management is disabled, the system BIOS will not
	  automatically power down devices, enter stand-by or suspended mode,
	  or perform any power-saving actions in response to AX=5305h calls
	should not be called from within a hardware interrupt handler to avoid
	  reentrance problems
	the APM BIOS should never be both disabled and disengaged at the same
SeeAlso: AX=5309h,AX=530Dh,AX=530Fh