31.2.1. Example Execution of an Instruction

Try these first

1. 1.

   What does the Memory Data Register (MDR) do?

   Hint

   Think about data movement within the CPU.

2. 2.

   Name one difference between single bus and three bus architectures.

   Hint

   Consider how data travels.

3. 3.

   What does the MDR temporarily hold?

   • Address
   • Data
   • Control Signals

   Hint

   Consider the purpose of the MDR.

4. 4.

   True or False: Three bus architectures do not require control signals.

   • True
   • False

   Hint

   Think about complexity variation.

5. 5.

   If a system suffers from high latency due to excessive control signals in a three bus architecture, how might you redesign it to optimize performance?

   Hint

   Think about how control signals can be simplified.

6. 6.

   Design an experiment to measure execution speed differences between a single bus and a three bus architecture using a specific instruction set.

   Hint

   How can you accurately record execution times?