Int 10 Fn BF0B  - Video - Compaq Extensions - Check Whether Video Reverse  [b]

   AX = BF0Bh

Return: CF clear
   AX = state (0000h normal video, 0001h reverse video)

Note:  supported by at least the QVision board and the LTE Lite ROM BIOS

See Also: AX=BF09h,AX=BF0Ah