TxtMd.PAS
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  { Example for TextMode }

  program Video;
  { Switch color monitor to 40 columns
   and back. Won't work on mono adapter. }
  uses Crt;
  var
    OrigMode: Integer;
  begin
    OrigMode := LastMode;
    TextMode(CO40);
    WriteLn('Big Characters');
    ReadLn;
    TextMode(OrigMode);
  end.