public void SIX(){
          pcIncrease();
          ComputeEffectiveAddress();
    	  getALU().OP2.set(getADDR().get());
    	  getALU().OP1.set(SelectIndexRegister().get());
    	  getALU().sub();
    	  SelectIndexRegister().set (getALU().RES.get());
          pause(MIDDLE);
    }