13.2.1. ADD Operation: Register Mode

Try these first

1. 1.

   What is the function of the Program Counter (PC)?

   Hint

   Think about its role in instruction flow.

2. 2.

   What does the Arithmetic Logic Unit (ALU) do?

   Hint

   It is part of processing data!

3. 3.

   What does the PC do during instruction fetching?

   • Points to current instruction
   • Points to next instruction
   • Deletes current instruction

   Hint

   What happens to the address after fetching an instruction?

4. 4.

   True or False: The result of the ADD operation is stored back in the first register mentioned.

   • True
   • False

   Hint

   Think about where results usually go after an operation.

5. 5.

   In a scenario where multiple ADD operations are queued, explain how the CPU efficiently processes these instructions.

   Hint

   Consider how instruction overlap can aid efficiency.

6. 6.

   Assuming a CPU has limited register space, detail the potential pitfalls of using too many registers during ADD operations.

   Hint

   Think about the trade-offs in register use vs performance.