What does your computer consists of?

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  • What does your computer consists of?

    1. 1. Computer hardware is anyphysical device associated with a computer system.
    2. 2. A computer system consists of a few basic components: CPU Main Memory Buses Input Auxiliary Output Device storage Device
    3. 3. Zooming in on the components: Input Any hardware device Device that sends data to the computer. Allows the user to interact with the computer.
    4. 4. Zooming in on the components: Input Any hardware device Device that sends data to the computer. Allows the user to interact with the computer.Examples are:keyboard and mouse.
    5. 5. Zooming in on the components: Output Any hardware device Device that outputs data from the computer. Allows the user to see the results processed by the computer.
    6. 6. Zooming in on the components: Output Any hardware device Device that outputs data from the computer. Allows the user to see the results processed by the computer.Examples are:monitor and printer.
    7. 7. Zooming in on the components:CPU Central processing unit or microprocessor. The heart of the computer. Processes the input data, prepares the result acordingly and produces the output.
    8. 8. Zooming in on the components:CPU Central processing unit or microprocessor. The heart of the computer. Processes the input data, prepares the result acordingly and produces the output.
    9. 9. Zooming in on the components: Main Stores data that is needed by Memory the CPU for execution - loses all data when the power is switched off. Primary memory - directly accessible by the CPU.
    10. 10. Zooming in on the components: Main Stores data that is needed by Memory the CPU for execution - loses all data when the power is switched off. Primary memory - directly accessible by the CPU.Examples are:Random access memory(RAM), Read-onlymemory (ROM).
    11. 11. Zooming in on the components: Auxiliary Stores information over a storage longer period - preserves data after the power is switched off. Secondary memory - not directly accessible by the CPU.
    12. 12. Zooming in on the components: Auxiliary Stores information over a storage longer period - preserves data after the power is switched off. Secondary memory - not directly accessible by the CPU.Examples are:harddisk (internal) andusb stick (external).
    13. 13. Zooming in on the components: Buses System within the computer hardware that moves data between the components. There are several types of buses. The type is determined according to the specific components it connects. Interconnection system.
    14. 14. Zooming in on the components: Buses System within the computer hardware that moves data between the components. There are several types of buses. The type is determined according to the specific components it connects. Interconnection system.
    15. 15. Zooming in on the CPU...
    16. 16. CPU ALU Cache Memory Control Registers UnitInterprets the instructions loaded into the mainmemory. The instructions either come from theinput device or a software program stored in theauxiliary memory. Generates signals to the othercomponents (tells the other components what todo and when).
    17. 17. CPU ALU Cache Memory Control Registers UnitArithmetic Logic Unit. Responsible forthe arithmetical and logical operations(the actual work the computer does). Acomputer can have more than one ALU.
    18. 18. CPU ALU Cache Memory Control Registers UnitSmaller and faster memory inside theCPU. Contains a copy of frequently usedinstructions and data from the mainmemory. Reduces the average time toaccess memory.
    19. 19. CPU ALU Cache Memory Control Registers UnitMemory within the CPU for temporarilystorage of information duringprocessing, such as instructions suppliedto the control unit and results ofoperations performed by the ALU.
    20. 20. Why is there memory everywhere? The storage of data and instructions is devided between different components as there is a tradeoff between: the speed at which the CPU can access the stored information, storage size and cost.

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