anchor.diff:        endmethod
      
   
  -      method Action set(Bit#(1) cmd, Bit#(2) regist, Bit#(40) addr);
  +      method Action set(Bit#(1) cmd, Bit#(2) regist, Bit#(DmaAddrSize) addr);
   	 if (cmd == 1)
   	    cmdRing.set(regist, addr);
   	 else
  
positive.code: import NopEngine::*;
  
  interface RingRequest;
     method Action set(Bit#(1) cmd, Bit#(2) regist, Bit#(40) addr);
     method Action get(Bit#(1) cmd, Bit#(2) regist);
     method Action hwenable(Bit#(1) en);
     method Action doCommandIndirect(Bit#(40) addr);
     method Action doCommandImmediate(Bit#(64) data);
  endinterface
  
  interface RingIndication;
     method Action setResult(Bit#(1) cmd, Bit#(2) regist, Bit#(40) addr);
     method Action getResult(Bit#(1) cmd, Bit#(2) regist, Bit#(40) addr);
     method Action completion(Bit#(32) command, Bit#(32) tag);
  endinterface
  
  
negative.code:       // to start a command, doCommand fires off a memory read to the
        // specified address. when it comes back, the doCommandRule will
        // handle it
        method Action doCommandIndirect(Bit#(DmaAddrSize) addr);
  	 //cmd_read_chan.readReq.put(addr);
        endmethod
     
  