INT 10 - VESA XGA BIOS Extensions - RETURN CURRENT VIDEO MODE

	AX = 4E04h
	DX = XGA handle
Return: AL = 4Eh if function supported
	AH = status
	    00h	 function successful
		BX??? = current mode
	    else error code
SeeAlso: AH=0Fh,AX=4E03h,AX=4F03h