INT 10 u - VIDEO - Tseng ET-4000 BIOS - CHECK IF IN HiColor MODE
        AX = 10F2h
        BL = 00h
Return: AX = 0010h if supported
        BL = video mode type
            00h normal
            else HiColor mode
Desc:   determine whether the display is in a graphics mode with 15 or more
          bits per pixel color resolution
SeeAlso: AH=0Fh,AX=10F0h,AX=10F1h

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