John von Neumann :: Computer Science

John von Neumann----------------Von Neumann, a mathematician designed the architecture modelfor a CPU. This model was a single storage organise to hold both theset of instruction manual on how to perform the computation and the datarequired or generated by the computation.He designed it by treating the instructions in the same way as thedata, a stored-program machine can easily change the instructions. Inother words the machine is reprogrammable.Von Neumanns archtectre is still used it todays modern CPUS.The CPU-------This diagram represents the structure of the Central ProcessingSystem.Arithmetic Logic Unit---------------------The ALU performs addition and subtraction, logic operations, masking,and faulting (multiplication and division).Control Unit------------The Control Unit is the heart of the computer. It controls andco-ordinates the systems operations. This contains the system clock,program counter and the instruction register. It also manages thesignals from the control ma ss.Registers---------This is a form of high-speed remembrance which is contained inside of theCPU. All data must be represented in a register before it can beprocessed. Information is stored temporarily in the registers in whichtext or buffer positions or rectangles can be saved for later use.Buses-----A bus is a channel or track between the components in a computer.Having a high-speed bus is important. A bus lets you connect computerscomponents to the processor.The advantage of a bus is that it makes parts more interchangeable. Ifyou unavoidableness to get a better graphics card, you simply unplug the old cardfrom the bus and plug in a new one. If you want twain monitors on yourcomputer, you plug two graphics cards into the bus. And so on.A PC usually has two buses. The first connects the CPU and the systemmemory. This is the fastest bus in the system. The second bus is theslower and it connects other devices, like the hard disk, CD drive,