Int 10 Fn BF08  - Video - Compaq Slt/286 - Write Color Mix Registers       [b]

   AX = BF08h
   CH = bits 7-4 green weight
        bits 3-0 blue weight
   CL = bits 7-4 unused
        bits 3-0 red weight

See Also: AH=12h/BH=33h,AX=BF07h