VON NEUMAN ARCHITECTURE FOR GCSE COMPUTER

VON NEUMAN ARCHITECTURE FOR GCSE COMPUTER

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  MADE BY: IBRAHIM SHABBIR XIG
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  Von Neumann architecturewas first published by John von Neumann in 1945. • His computer architecture design consists of a Control Unit, Arithmetic and Logic Unit (ALU), Memory Unit, Registers and Inputs/Outputs. • Von Neumann architecture is based on the stored-program computer concept, where instruction data and program data are stored in the same memory. This design is still used in most computers produced today.
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  • Registers arehigh speed storage areas in the CPU. All data must be stored in a register before it can be processed. • MARMemory Address Register holds the memory location of data that needs to be accessed • MDRMemory Data Register holds data that is being transferred to or from memory • AC Accumulator is where intermediate arithmetic and logic results are stored • PC Program Counter Contains the address of the next instruction to be executed
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  BUSES • A standardCPU system bus is comprised of a control bus, data bus and address bus. • Address Bus Carries the addresses of data (but not the data) between the processor and memory • Data Bus Carries data between the processor, the memory unit and the input/output devices • Control Bus Carries control signals/commands from the CPU (and status signals from other devices) in order to control and coordinate all the activities within the compute