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CBL_WRITE_SCR_N_CHATTR 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.
 
     attribute               The attribute to write.
 
     string-length           The number of screen positions to write
                             the character-attribute pair 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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