21.1.5. Branch Decision Logic

Try these first

1. 1.

   What is the function of a Micro-Programmed Control Unit?

   Hint

   Think about what it directs in the CPU.

2. 2.

   Define the Micro-Program Counter (MPC).

   Hint

   Consider its tracking role in instruction execution.

3. 3.

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

   • Tracks current instruction address
   • Stores control signals
   • Manages memory allocation

   Hint

   Consider what is being tracked by the MPC.

4. 4.

   True or False: Unconditional branches depend on the evaluation of conditions to determine the next instruction address.

   • True
   • False

   Hint

   Think about what distinguishes conditional from unconditional branches.

5. 5.

   Given a sequence of instructions with multiple branches, devise how the MPC should update based on the zero and carry flags after execution.

   Hint

   Review how flags influence MPC decisions.

6. 6.

   Create a flowchart that illustrates the decision-making process for executing an unconditional branch instruction within a micro-program.

   Hint

   Focus on the immediate effects of unconditional directives.