INT 10 - VIDEO - Compaq Extensions - SET MODE SWITCH DELAY
        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
SeeAlso: AX=BF05h

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