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(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. 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(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. should never be both disabled and disengaged at the same
	  time
SeeAlso: AX=5309h,AX=530Dh,AX=530Fh