Design a serial adder circuit using Verilog.  The circuit should add two 8-bit numbers, A and B. 

The result should be stored back into the A register.  Use the diagram below to guide you. 

Hint:  Write one module to describe the datapath and a second module to describe the control. 

Annotate your simvision trace output to demonstrate that the adder works correctly. 

Demonstrate by adding $45 to $10 in your testbench.