INT 15 - Advanced Power Management v1.2 - ENABLE/DISABLE TIMER-BASED REQUESTS   
	AX = 5313h
	BX = device ID (see #00474)
	    0000h (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.)
	    other reserved
	CL = function
	    00h disable timer-based requests
	    01h enable timer-based requests
	    02h get timer-based requests status
Return: CF clear if successful
	    CX = timer-based requests status (0000h disabled, 0001h enabled)
	CF set on error
	    AH = error code (03h,09h,0Ah,0Bh,86h) (see #00473)
Notes:	this function is supported via the INT 15, 16-bit protected mode, and
	  32-bit protected mode interfaces
	some BIOSes set AH on return even when successful
SeeAlso: AX=5300h,AX=5310h,AX=5311h,AX=5312h