This question is about PROCESSOR ARCHITECTURE.

Question

a) With the aid of a diagram, explain the operation of a computer’s CPU at the level of registers, functional units, and buses.
You must provide a diagram of the structure of a computer and explain how an instruction is executed in terms of the flow of information between registers and functional units.

b) Explain why indexed addressing mode (also called register indirect addressing) has been implemented and what it does.
Give a typical example of the use of indexed addressing.

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