Digital Systems: Principles and Design

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Digital Systems

3. How do you connect four registers A, B and C on a common data bus? Write

sequences of signals to be activated to swap the bytes from A to B. (Hint: Swapping

is by A stored in C, B transferred to A and C transferred to B).

4. How do you connect four registers A, B, C and D on a common data bus? Write

sequences of signals to be activated to transfer a byte from B to C.

5. How do you use the buses for writing to a 32 kB RAM?

6. How do you use the buses for a 256 MB system from four 64 MB RAMs?

7. What are bus signals when IO port devices and 1 MB memories write and read by

the same set of bus signals? Why should you assign