31.1.3. Register File and ALU Configuration

Try these first

1. 1.

   Define what MAR stands for and its role in a computer system.

   Hint

   What does MAR help the CPU to do?

2. 2.

   What value does the MDR hold after retrieving data from a memory address?

   Hint

   It stores data fetched from where?

3. 3.

   What does the MAR stand for?

   • Memory Address Register
   • Memory Access Register
   • Memory Attribute Register

   Hint

   What is the first word in MAR?

4. 4.

   True or False: In a three-bus architecture, multiple operations can happen simultaneously.

   • True
   • False

   Hint

   Think of how many buses are used.

5. 5.

   Given a CPU with three registers and a MAR, explain how you would transfer a data value from the MDR to a particular register using both single bus and three-bus architectures. Identify the signals involved.

   Hint

   Think about how many buses are in use.

6. 6.

   Construct a flowchart depicting the data transfer process in both architectures and outline the differences in control signals used during the operations.

   Hint

   Start with MAR fetching the address.