Screen Output from C and Assembly Language
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     The ANSITERM terminal driver overwrites all output from C and Assembly
     Language when it refreshes the screen from the screen buffer.  As a
     consequence, you should perform all screen output from CA-Clipper.

     The ANSITERM terminal driver also virtualizes the cursor.  This means
     that BIOS functions that report the location of the hardware cursor will
     not always return the correct value.  To obtain the cursor position, use
     CA-Clipper's  ROW() and COL() functions instead.