15.2.1. Loading Content from Register

Try these first

1. 1.

   What is the main difference between direct and indirect addressing modes?

   Hint

   Think about how addresses are specified in each mode.

2. 2.

   What does the MAR stand for?

   Hint

   Consider what role it plays in retrieving data.

3. 3.

   What does indirect addressing require before fetching the operand?

   • Directly gets the operand
   • Fetches the address first
   • Uses immediate values

   Hint

   Recall the layered addressing concept.

4. 4.

   True or False: Register indirect addressing can help improve execution speed.

   • True
   • False

   Hint

   Consider how registers compare with memory access times.

5. 5.

   You have an instruction that requires an indirect address to fetch an operand stored in memory. Detail the steps the CPU must follow to successfully load this operand.

   Hint

   Think through each stage of the processing pipeline.

6. 6.

   Imagine you're designing a new CPU. How would you optimize the register indirect mode to improve performance? Discuss potential changes.

   Hint

   Consider how CPU architectures balance speed and resource efficiency as you think through your design.