INT 2F - MS Windows 3.1 - IDENTIFY WINDOWS VERSION AND TYPE                     
	AX = 160Ah
Return: AX = 0000h if call supported
	    BX = version (BH=major, BL=minor)
	    CX = mode (0002h = standard, 0003h = enhanced)
Note:	Windows95 reports version 4.00, Windows95B reports version 4.03
SeeAlso: AX=1600h,AX=4680h