"Design a digital circuit that multiplies two binary numbers by the repeated addition method (to mult. 5x4, the digi system evaluates the product by adding the multiplicand fours times: 5+5+5+5=20). Let the multiplicand be in register BR, the multiplier in reg AR, the product in reg PR. An adder circuit adds the contents of BR to PR. A zero-detection circuit Z checks when AR becomes 0 after each time that it is decremented."