19.2.1. Instruction Fetch Process

Try these first

1. 1.

   What does the program counter do in the instruction fetch process?

   Hint

   Think about how CPUs know which instruction to execute next.

2. 2.

   What is the function of the Memory Address Register (MAR)?

   Hint

   Consider what happens in memory operations.

3. 3.

   What does the program counter do?

   • Holds the current instruction
   • Tracks the next instruction address
   • Stores the last executed instruction

   Hint

   Think about which register manages the flow of the instruction cycle.

4. 4.

   The Memory Address Register is responsible for:

   • True
   • False

   Hint

   Recall what happens to addresses in memory transactions.

5. 5.

   Sketch an FSM diagram representing the instruction fetch sequence showing states and transitions. Include at least three states and discuss transitions based on signal changes.

   Hint

   Think diagrammatically about the flow of signals and operations.

6. 6.

   Discuss how the instruction fetch process could be optimized to allow faster processing within the CPU architecture. What could be introduced?

   Hint

   Consider modern techniques in CPU design for efficiency.