System Architecture 0.0 / 5 ? ComputingSystem ArchitectureGCSEOCR Created by: Bailey.TimmonsCreated on: 25-04-18 12:58 What is the purpose of the CPU? The CPU executes instructions, performs calculations and controls the other hardware 1 of 7 What are the 4 components of Von Neumann architecture? MAR (Memory Address Register), MDR (Memory Data Register), Program counter and the Accumulator 2 of 7 What is the purposes of the MAR? It stores the location of the data that is going to be accessed next 3 of 7 What is the purpose of the MDR? It stores the data that has just arrived or is about to be sent off 4 of 7 What is the purpose of the Program counter? It contains the location of the next instruction, it is updated with a new location every time 5 of 7 What is the purpose of the accumulator? It stores the reults of the calculations performed by the ALU 6 of 7 What is the puporse of the ALU? It performs various calculations, either arithmetic functions or logic functions 7 of 7
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