8.2.2. ADD Instruction Execution

Try these first

1. 1.

   What does the program counter (PC) do?

   Hint

   Think about where the CPU looks to find the next instruction.

2. 2.

   What is the Memory Address Register (MAR)?

   Hint

   Which register is responsible for address handling?

3. 3.

   What role does the program counter (PC) play in instruction execution?

   • It calculates arithmetic operations.
   • It stores data temporarily.
   • It holds the address of the next instruction.

   Hint

   Consider what direction the CPU needs for its next action.

4. 4.

   Is clock grouping related to optimizing execution?

   • True
   • False

   Hint

   Think about ways to make processes quicker.

5. 5.

   Explain the complete instruction execution cycle for an ADD instruction that employs non-immediate addressing. Include all time steps.

   Hint

   Focus on how information flows from one register to another.

6. 6.

   Design a sequence for an ADD instruction with both immediate and non-immediate addressing while explaining your reasoning behind the timing of each step.

   Hint

   Consider how fetching and processing occurs differently in each case.