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Assembly Source File  |  1983-11-17  |  132 b   |  8 lines
  1.  
  2. *CONDITIONAL REF - REF A IF A NOT DEFINED
  3.  
  4. $CREF  $MACRO A
  5.        $IF  A.SA&$UNDF
  6.        REF  :A:
  7.        $ENDIF
  8.        $END