decoder_3x8 Decoder1(.B(inputs[1]),.D(outputs[15:8]),.C(inputs[0]),.EN(inputs[3]),.A(inputs[2])); // D0-D7 decoder_3x8 Decoder2(.B(inputs[1]),.D(outputs[7:0]),.C ...

For the circuit, There were a multitude of things used, such as an FSM which acted as a mealy machine, a decoder which would take the current state of the machine and send a 16 digit number to the ALU ...