24.1. Computer Organization and Architecture: A Pedagogical Aspect

Try these first

1. 1.

   What is the purpose of the fetch-execute cycle?

   Hint

   What are the three main tasks in this cycle?

2. 2.

   Define a microprogram.

   Hint

   What does micro refer to in this context?

3. 3.

   What does the fetch-execute cycle involve?

   • Fetching
   • Encoding
   • Executing
   • Fetching
   • Decoding
   • Executing
   • Decoding
   • Executing
   • Writing

   Hint

   Think about the order of operations when the CPU deals with instructions.

4. 4.

   True or False: Branching is not necessary in microprogram execution.

   • True
   • False

   Hint

   What allows us to direct the execution to different microinstructions?

5. 5.

   Design a microprogram for a simple calculator that handles addition and subtraction, detailing how to optimize memory usage.

   Hint

   Consider how to minimize redundancy in commands.

6. 6.

   Analyze how changes in control word format could affect overall CPU performance in different scenarios.

   Hint

   Think about high-volume versus low-volume instruction processing.