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John von Neumann Von Neumann, a mathematician designed the architecture model for a CPU. This model was a single storage structure to hold both the set of instructions on how to perform the computation and the data required or generated by the computation. He designed it by treating the instructions in the same way as the data, a stored-program machine can easily change the instructions. In other words the machine is reprogrammable. Von Neumann's archtectre is still used it todays modern CPU'S. The CPU This diagram represents the structure of the Central Processing System. Arithmetic Logic Unit The ALU performs addition and subtraction, logic operations, masking, and shifting (multiplication and division). Control Unit The Control Unit is the heart of the computer. It controls and co-ordinates the systems operations. This contains the system clock, program counter and the instruction register. It also manages the signals from the control bus. Registers This is a form of high-speed memory which is contained...

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