INT 10 - VIDEO - Tseng ET-4000 BIOS - SET HiColor GRAPHICS MODE
        AX = 10F0h
        BL = video mode (see also AH=00h)
            32768-color modes:
                13h = 320x200
                2Dh = 640x350
                2Eh = 640x480
                2Fh = 640x400
                30h = 800x600
            16M-color modes:
                3Eh = 640x480 (Genoa 7900)
Return: AL = 10h if supported
        AH = status
            00h if successful
            other on error
Note:   the Tseng HiColor BIOS extensions are supported by:
          Diamond Computer Systems      SpeedStar HiColor VGA
          Everex Systems                HC VGA
          Focus Information Systems     2theMax 4000
          Cardinal Technologies         VGA732
          Orchid ProDesigner IIs        Genoa 7900
SeeAlso: AX=10E0h,AX=10F1h,AX=10F2h