22.5. Testing and Execution of Instructions

Try these first

1. 1.

   What are the three main components of the microprogram counter architecture?

   Hint

   Think about what determines control within a CPU.

2. 2.

   Define the role of a branch address field.

   Hint

   Consider the branching logic based on conditions.

3. 3.

   What does the branch address field determine?

   • The immediate value to load
   • Where to jump in instruction
   • The next control signal

   Hint

   Consider what branching provides in instruction execution.

4. 4.

   True or False: Control signals do not influence instruction execution.

   • True
   • False

   Hint

   Remember the functionality of control signals in architecture.

5. 5.

   Given a sequence of control signals and a condition code, predict the behavior of the micro-program counter.

   Hint

   Track which conditions are true or false.

6. 6.

   Design a simple microprogram instruction set and outline the control signal structure required for each instruction.

   Hint

   Remember to include at least 3 varied instructions with their unique needs.