INT 10 - SOLLEX SuperVGA - VIDEO SUPPORT CONTROL - INITIALIZE VIDEO SUPPORT
        AX = 7F03h
        BL = 01h
        CX = support request
        ES = segment of support code
Return: AL != 7Fh if not supported
        AL = 7Fh if supported
            AH = status
                00h successful
                01h failed
Note:   initializes the indicated video support by calling ES:0003h; this
          function may be used to switch the active video support back to
          ROM after AX=7F03h/BL=02h