Bite size revision for GCSE Computer Science

1.1.1 The purpose of the CPU

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Today we're looking at the purpose of the CPU, specifically the following parts from the OCR Computer Science Specification (https://www.ocr.org.uk/images/225975-specification-accredited-gcse-computer-science-j276.pdf)

the purpose of the CPU 

Von Neumann architecture:

  • MAR (Memory Address Register)
  • MDR (Memory Data Register) 
  • Program Counter 
  • Accumulator 

    • common CPU components and their function:

    • ALU (Arithmetic Logic Unit)
    • CU (Control Unit)
    • Cache

      • the function of the CPU as fetch and execute instructions stored in memory 

      clock speed

      ...more
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      Bite size revision for GCSE Computer ScienceBy Laura James

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