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

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