UNIT NAME:  CRT

  DECLARATION:  USES CRT;

      REMARKS:  The CRT unit provides a set of routines for controlling
                the display mode, colors, windows, sound, and the keyboard.

                The procedures and functions of the CRT unit can only be
                used on true IBM PCs, ATs, PS/2s and true compatibles.



                                 VARIABLES 
 ----------------------------------------------------------------------------

  CheckBreak        Enable/Disable Ctrl-Break checking in DOS
  CheckEof          Enable/Disable End-Of-File Character
  CheckSnow         Enables/Disables snow checking when storing
                    characters directly into video memory.
  DirectVideo       Enables/Disables direct video memory writes
  LastMode          Saves current mode when TextMode is called
  TextAttr          Sets the current Text color attributes
  WindMin           Stores minimum coordinates of current window
  WindMax           Stores maximum coordinates of current window