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Components of a Processor

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What are the different Registers?

Program Counter (PC) Accumulator (ACC) Memory Address Register (MAR) Memory Data Register (MDR) Current Instruction Register (CIR)

What is the FDE cycle?

Fetch-Decode-Execute 1. Fetching instructions 2. Decoding instructions 3. Executing the Decoded Instruction

What is assembly code instructions split into?

Operand and Opcode

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These documents contain summaries of the information required for the OCR exams for A level Computer Science. They are split into each unit and contains all the necessary information and some which may or may not necessarily be needed at the time, however it is all useful to the course.

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