26.1. Introduction to Micro Instructions

Try these first

1. 1.

   Define a micro instruction.

   Hint

   Think about its role in executing instructions.

2. 2.

   What does ALU stand for?

   Hint

   Consider its function in processing data.

3. 3.

   What is a micro instruction?

   • A high-level programming command
   • A directive controlling CPU operations
   • An external input device

   Hint

   Think of its role in instruction execution.

4. 4.

   True or False: Implicit jumps are always stated in the macro instruction.

   • True
   • False

   Hint

   Remember the definitions of explicit and implicit jumps.

5. 5.

   Design a micro program that handles both an ADD and a SUB operation using a shared micro routine. Explain how control signals would differ.

   Hint

   List out the steps and specify which control signals uniquely identify ADD vs. SUB.

6. 6.

   In what scenarios can implicit jumps enhance processing efficiency, and what potential issues could arise from their use?

   Hint

   Consider task efficiency vs. clarity in program flow.