Int 10 Fn 7F03  - Sollex Supervga - Video Support Control - Initialize Vi  [V]

   AX = 7F03h
   BL = 01h
   CX = support request
   ES = segment of support code

Return: AL <> 7Fh if not supported
   AL = 7Fh if supported
       AH = status
       00h successful
       01h failed

Note:  initializes the indicated video support by calling ES:0003h; this
     function may be used to switch the active video support back to
     ROM after AX=7F03h/BL=02h

See Also: AX=7F03h/BL=00h