Int 10 Fn BF0E  - Video - Compaq Extensions - Check Dac 6-bit/8-bit Mode   [b]

   AX = BF0Eh

Return: CF clear
   AL = DAC mode
       00h in 6-bit mode
       01h in 8-bit mode

Note:  supported by at least the QVision board and the SystemPro XL ROM BIOS

See Also: AX=BF0Ch,AX=BF0Dh