public void AIR() {
         pcIncrease();
          ComputeEffectiveAddress(); 
          getALU().OP2.set(getADDR().get());
    	  getALU().OP1.set(SelectRegister().get());
    	  getALU().add();
    	  SelectRegister().set (getALU().RES.get());
          pause(MIDDLE);
    
    }