22.2.2. Condition Select Field Implementation

Try these first

1. 1.

   What is the purpose of the Micro-Program Counter (MPC)?

   Hint

   Think about what keeps count of instructions.

2. 2.

   Explain what a condition select field is.

   Hint

   Consider how it influences decisions in the program flow.

3. 3.

   What does the MPC do when a condition is true?

   • Increment PC
   • Jump to a new address
   • Ignore the condition

   Hint

   Think about the outcome when conditions are verified.

4. 4.

   True or False: The condition select field does not impact instruction execution flow.

   • True
   • False

   Hint

   What role does this field serve in decision-making?

5. 5.

   Given a set of instructions with various condition flags, design a flowchart that captures the decision-making process for jumps and increments. Explain each path with examples.

   Hint

   Start with a base condition and illustrate the outcomes of each decision.

6. 6.

   Analyze the sparsity problem in micro-program control memory and propose a structure that improves efficiency. Justify your proposal with examples.

   Hint

   Consider how many bits are usually zero and how eliminating them can save space.