13.2.3. Stage 2: ALU Operation

Try these first

1. 1.

   What does the ALU stand for?

   Hint

   Remember the main functions of this unit.

2. 2.

   What happens to the PC after an instruction is fetched?

   Hint

   Think about how instructions are executed sequentially.

3. 3.

   What does the PC do after fetching an instruction?

   • Decreases by one
   • Increments by one
   • Remains unchanged

   Hint

   Think about how instructions are executed in sequence.

4. 4.

   True or False: The ALU can perform both arithmetic and logic operations.

   • True
   • False

   Hint

   Recall the various functionalities of the ALU.

5. 5.

   If the instruction fetched is a conditional jump, explain how this may alter the typical flow of the PC and control signals.

   Hint

   Consider how conditions influence the PC's progression.

6. 6.

   Design a hypothetical instruction cycle for a complex computational task involving multiple ALU operations. Describe each step.

   Hint

   Think about how complex tasks require multiple stages in instruction cycles.