INT 2F - OS/2 v2.0+ - INSTALLATION CHECK / GET VERSION                          
	AX = 4010h
Return: AX = 4010h if OS/2 not installed
	AX = 0000h for OS/2 Warp 3.0
	BX = OS/2 version if installed
Note:	OS/2 Warp 3.0
SeeAlso: INT 21/AH=30h,INT 21/AX=3306h