NCR 77C22E VGA


  3C4h index  5  (R/W):
  bit 0-7  0=Disable extensions, 1=Enable

  3C4h index 18h (R/W):
  bit 0-7  Bank no in 16Kbyte blocks.




  3C4h index 10h and 19h used.



  ID NCR VGA:

  if isport($3c4,5,$ff) then
  begin
    portw[$3c4]:=5;   {Lock extensions}
    if not isport($3c4,$10,$ff) then
    begin
      portw[$3c4]:=$105;
      if isport($3c4,$10,$ff) then NCR_VGA !!


  Video Modes:
 
  58h G  800  600  16  planar
  5Ch G  800  600 256  packed
  5Dh G 1024  768  16  planar
  5Eh G  640  400 256  packed 
  5Fh G  640  480 256  packed