12.2.4. Objectives of the Unit

Try these first

1. 1.

   What are control signals and their purpose?

   Hint

   Think about how different CPU parts communicate.

2. 2.

   Name the three phases of the instruction execution cycle.

   Hint

   Recall the acronym 'FDE'.

3. 3.

   What does the acronym FDE stand for in instruction execution?

   • Fetch
   • Decode
   • Execute
   • Fetch
   • Decode
   • Evaluate
   • Fetch
   • Decode
   • Exit

   Hint

   Remember the steps a CPU follows to process an instruction.

4. 4.

   True or False: Control signals are not essential for effective CPU operations.

   • True
   • False

   Hint

   Think about what makes CPU tasks run smoothly.

5. 5.

   Create control signal sequences for a conditional jump instruction, explaining potential differences in execution compared to a simple load instruction.

   Hint

   Consider what happens to the program counter in a jump.

6. 6.

   Analyze how control signals differ when executing immediate addressing mode versus direct addressing mode.

   Hint

   Focus on how operands are accessed.