INT 10 - VIDEO - Compaq Extensions - NEW ACTIVE MONITOR                         
	AX = BF12h
	BH reserved
	BL = function mask (see #00215)
Return: CF clear
Notes:	this function is a NOP if the VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers. subsystem is inactive or the current
	  Display Combination Code is 10h or higher
	supported by at least the QVision board and the LTE Lite and ProSignia
	  ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. BIOSes
SeeAlso: AX=BF01h,AX=BF02h,#00733


Bitfields for function mask:
Bit(s)	Description	(Table 00215)
 7	command mode
	if set, bits 1 and 0 make the monitor active when set
	if clear, bits 1 and 0 toggle the monitor's state when set
 6-2	reserved
 1	internal monitor
 0	external monitor