Int 10 Fn BF04  - Video - Compaq Extensions - Set Mode Switch Delay        [b]

   AX = BF04h
   BH = new state of delay
       00h enabled
       01h disabled

Note:  the 04/08/93 sytem ROM appears to use BL instead of BH; a future
     version of the list will provide more definite information

See Also: AX=BF05h