DRBD ...[??? EMPTY SECT CENT FGN 32 DOC 
 DRL=    #   
 DS5W    #     THIS MACRO MAKES AN ELEMENT EMPTY 
 DSKG    #   
 DT56    #MAC  EMPTY 
 DTJQ          LDN   0  %A   
 DW4B          STO   0  FPTR+%A  
 DWJ2          STO   0  BPTR+%A  
 DX3L    #NOR