Practice Purpose Of Registers (12.6.2) - Fetch Cycle - Computer Organisation and Architecture

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6 sample questions

Question 1.
What does the program counter hold?
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Think about where the CPU looks for its next instruction.
Question 2.
What is the function of the MAR?
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What helps the CPU find where to look in memory?
3Question 3.
What does the program counter do?
- It stores the address of the last instruction.
- It holds the address of the next instruction to be executed.
- It directly executes the instruction.
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Think about what the CPU needs to find next in memory.
4Question 4.
True or false: The MAR can contain data as well as addresses.
- True
- False
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What role does MAR play regarding memory?
Question 5.
Analyze what would happen if there was a conflict between the MAR and MBR operations during a fetch cycle.
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Consider why timing is critical in the fetch cycle.
Question 6.
Design a hypothetical situation where the PC might not point to a valid instruction address. What implications would this have?
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What checks should be in place to ensure PC validity?

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