Practice Designing Control Steps For Different Instructions (13.3.3)

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6 sample questions

Question 1.
What does the Program Counter (PC) do?
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Think about where instructions come from.
Question 2.
Name the register that holds the current instruction in execution.
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Find out which register holds the instruction.
3Question 3.
What is the first step in executing an instruction?
- Load instruction from memory
- Increment the Program Counter
- Fetch data from registers
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Consider which action comes before fetching the instruction.
4Question 4.
True or False: The Memory Address Register (MAR) holds instructions.
- True
- False
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Think about the role of MAR during instruction execution.
Question 5.
Design a control signal flow chart for the instruction LOAD R2, M.
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Start with noting down the sequence of actions taken from the PC to the registers.
Question 6.
Explain how a conditional instruction like JUMP affects the control steps designed for instructions.
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Think about control flow and how condition affects execution path.

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