Int 10 Fn BF0A  - Video - Compaq Lte Lite - Disable ???                    [b]

   AX = BF0Ah

Return: CF clear

Note:  clears bit 6 of port 03CEh index 81h; in some cases also sets index 84h
     to 80h and index 83h to FBh

See Also: AX=BF09h,AX=BF0Bh