INT 10 - VESA XGA BIOS Extensions - RETURN XGA SUBSYSTEM INFORMATION

	AX = 4E01h
	DX = XGA handle (0 to number of XGAs-1)
	ES:DI -> 256-byte buffer for subsystem information (see #00071)
Return: AL = 4Eh if function supported
	AH = status
	    00h	 function successful
	    else error code
SeeAlso: AX=4E00h,AX=4E02h