macro du [args] 
 { common local ..times,..size,..char 
   virtual at 0 
      db args 
      ..size = $ 
   end virtual 
   repeat ..size 
      virtual at 0 
        db args 
        load ..char byte from $ - ..size + % - 1 
      end virtual 
      if ..char > 127 
        db ..char-0b0h, 04h 
      else 
        du ..char 
      end if 
   end repeat } 

struc du [args] { common du args }