Int 10 Fn 007F  - Video - Paradise Vga, At&t Vdc600 - Set Vga Operation    [V]

   AX = 007Fh
   BH = 00h

Return: AL = 7Fh if successful (AT&T VDC600)
   BH = status (Paradise/Dell)
       00h invalid function
       7Fh successful

See Also: AX=007Fh/BH=01h,AX=007Fh/BH=02h