20.2.1. Objective Overview

Try these first

1. 1.

   What is the role of the control unit?

   Hint

   Think about what coordinates operations in the processor.

2. 2.

   Define microinstructions.

   Hint

   Consider how these break down macro instructions.

3. 3.

   What is the primary function of a control unit?

   • A. Store data
   • B. Execute programs
   • C. Direct the operation of the CPU

   Hint

   Think about the role managing operations.

4. 4.

   Is a micro-programmed control unit faster than a hardwired control unit?

   • True
   • False

   Hint

   Consider speed versus flexibility.

5. 5.

   Design a simple micro-program for an ADD operation with two registers, detailing each microinstruction and its associated control signals.

   Hint

   Break down the addition process into operations.

6. 6.

   Explain how conditional branching differs in micro-programmed control from hardwired control and give an example.

   Hint

   Consider how conditions dictate flow in both systems.