public void JZ(){
        
        ComputeEffectiveAddress();  
       
        if  (SelectRegister().get().equals(String.format("%0" + 20 + "d", 0) )) {
                        
            if (getI().get().equals("0")) 
                getPC().set(getMAR().get());
            else
                getPC().set(getMEMORY().get(getMAR().get()));
        }
        else {
            pcIncrease();
            
        }
            
      }