1. In the picture of RAM below, identify which are data wires, which are address wires, and which are control wires.

2. Which register receives data from the rest of the computer (registers in the CPU) but does not send data to them?

               MAR           MBR

3. Which register must be the same width as a memory word?

               MAR           MBR

4. On the picture below, which shows one flip-flop of the MBR, label the unidentified lines by filling in the boxes with the following:

               from system registers                 from RAM flip-flops
               to system registers                   to RAM flip-flops