anchor.diff:           return databit;
         endmethod
   
  -      interface FIFO#(a) data = datafifo;
  -      
      endinterface
   
  +   interface FIFOF data = datafifo;
  +      
  +
   endmodule
positive.code:    rule continueshift;
        if (count != 0)
  	 begin
  	    if (count == asize - 1)
  	       begin
  		  count <= 0;
  		  framebit <= 0;
  
negative.code:  * message must be removed ASAP or be overwritten 
   */
  interface SerialLinkOut;
     method bit frame();
     method bit data();
  endinterface
  
  interface LinkOut#(type a);
  