A charity uses a desktop computer to record financial donations that it receives. The computer contains a single core, 2.4GHz processor with 2MB cache.
The processor contains registers including the accumulator and the program counter. The contents of these registers are modified during the Fetch-Decode-Execute cycle.
State the name of three other registers that are used during the Fetch-Decode-Execute cycle.
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A program written using the Little Man Computer instruction set is shown in Fig. 1.
Various registers are used when the program above is executed.
State what is meant by the term ‘register’.
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OCR Insurance uses a computer system to calculate the price that customers pay for car insurance.
The computer system contains a CPU, GPU, RAM and ROM
State two factors that affect the performance of a CPU.
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Fig. 1 shows assembly code written using the Little Man Computer (LMC).
The program calculates and outputs the total amount that is donated to a charity in any particular day. Depending on the amount, an additional bonus may be added to each amount donated.
This program is run on a processor that allows pipelining.
Define the term ‘pipelining’.
Explain one benefit to the charity of using a processor that allows pipelining.
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The CPU uses pipelining to improve efficiency.
Explain what is meant by the term ‘pipelining’
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Explain why pipelining can improve the performance of the processor.
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A program written using the Little Man Computer instruction set is shown in Fig. 1
Various registers are used when the program above is executed.
Explain how the accumulator is used when the line BRP pos is executed.
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