13.1.3. Stage 3: Loading Instruction into Register

Try these first

1. 1.

   What does the Program Counter (PC) do?

   Hint

   Think about how instructions are executed sequentially.

2. 2.

   What is the function of the Instruction Register (IR)?

   Hint

   Consider what happens before an instruction executes.

3. 3.

   What is the purpose of the Memory Data Register?

   • A. Store the program counter
   • B. Store the current instruction
   • C. Temporarily hold data between memory and processor

   Hint

   Think about what a register like MDR is meant to do.

4. 4.

   True or False: The instruction register directly executes the instructions.

   • True
   • False

   Hint

   Consider the roles of different components within the CPU.

5. 5.

   Describe how the instruction fetching process would change if the architecture involved multiple buses instead of a single bus.

   Hint

   Think about how having more paths would affect efficiency and processing time.

6. 6.

   Analyze a hypothetical situation where the instruction register malfunctions. What impact would this have on the CPU's operation?

   Hint

   Consider the role of the IR in the overall function of the CPU.