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CBL_WRITE_SCR_N_CHAR Details (↑ Screen Routines)
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  Parameters on Entry:
 
     screen-position         The screen position at which to start writing.
                             The top left corner is row 0, column 0.
                             See Notes on screen routines.
 
     character               The character to write.
 
     string-length           The number of screen positions to write
                             the character to. If this would go off
                             the end of the screen, the write finishes
                             at the end of the screen.
 
  Parameters on Exit:
 
     None
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