21.2.1. Micro-Program Organization

Try these first

1. 1.

   What is the role of the micro-program counter?

   Hint

   Think about what component manages the flow of instructions.

2. 2.

   Define micro-program.

   Hint

   What do we call instructions at the micro level?

3. 3.

   What is the main purpose of the micro-program counter (MPC)?

   • To hold the current instruction
   • To point to the next micro instruction
   • To manage memory allocation

   Hint

   What part of the control unit tracks the upcoming command?

4. 4.

   True or False: The fetch phase is identical for all types of instructions.

   • True
   • False

   Hint

   Think about how instructions are initially handled.

5. 5.

   Design a simple micro-program for adding two numbers stored in registers R1 and R2. Outline the sequence of micro instructions and any branching that may be needed.

   Hint

   Think about how to ensure the program adapts to unexpected conditions.

6. 6.

   Explain the implications of having multiple micro instructions tied to a single macro instruction. How does this affect the micro-program counter?

   Hint

   Consider what happens when executing operations involving conditions.