INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (VGA, MCGA) - VIDEO ADDRESSING

	AH = 12h
	BL = 32h
	AL = new state
	    00h enable video addressing
	    01h disable video addressing
Return: AL = 12h if function supported
Desc:	specify whether the CPU should have access to video memory and the
	  display adapters I/O registers