21.1.1. Sequencing and Control Signals

Try these first

1. 1.

   What is the role of the micro-programmed control unit?

   Hint

   Think about how instructions are processed.

2. 2.

   Define a control signal.

   Hint

   What sends commands or directions within the control unit?

3. 3.

   What is the primary function of the micro-programmed control unit?

   • To execute arithmetic operations
   • To generate control signals
   • To store data

   Hint

   Focus on what guides the execution of instructions.

4. 4.

   True or False: The micro-program counter increments unconditionally after every executed instruction.

   • True
   • False

   Hint

   Think about when the counter might need to hold.

5. 5.

   Given the instruction ADD R1, R2, design the micro-program memory layout including specific control signal encodings and conditions for branching.

   Hint

   Think about how each part of ADD could correspond to sections in memory.

6. 6.

   Explain in detail how the micro-program counter adjusts based on different instruction types and status conditions.

   Hint

   Remember the variations that could affect the counter's behavior.