INT 10 - VIDEO - Compaq Extensions - GET HIGH ADDRESS MAP REGISTER              
	AX = BF10h
Return: CF clear
	AX = current value of high address map register
Notes:	supported by at least the QVision board and the SystemPro XL and LTE
	  Lite ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. BIOSes
	the Compaq QVision documentation (October 1993) says the value is
	  returned in BX, but this appears to be one of many typos
SeeAlso: AX=BF0Fh