Eugenius Kuncoro

COMPUTER HARDWARE

Posted: September 30th 2012
The hardware components of an information system:
  • CPU (central processing unit)/system unit
  • Memory (primary and secondary storage)
  • Input devices
  • Output devices
Two main components on the motherboard?
  • Central Processing Unit (CPU)
    Also called a processor
    Carries out instructions that tell computer what to do
  • Memory
    Temporary holding place for data and instructions

What are common components inside the CPU?

  1. Processor
  2. Memory
  3. Adapter card
  4. Ports
  5. Drive bays
  6. Power supply
What is the motherboard?Main circuit board in system unit.
A microprocessor that executes instructions to perform processing tasks,component part are : Control unit,Arithmetic-Logic Unit, Registers, Primary Storage.
The function of Control Unit are :
Access program instructions,Decode instructions,Control flow of data throught system, and Data flows through path called buses.
Arithmetic-Logic Unit : Perform computations on data, Perform comparisons on data.
Registers : High speed storage areas, Hold data and instructions.
Primary Storage is a temporary storage area that hold three things, in formations, application software, and operating system. Types of Primary Storage : Register(fery fast, limited), RAM(memory chips on motherboard, general storage of program instructions and data, volatile), Cache Memory(faster than RAM, used to provide intermediate storage between secondary storage and RAM) , ROM(chips storing permanent instructions needed by computers, nonvoltile).
Secondary Memory : Nonvolatile, Huge storage capacity, cheaper and slower than primary storage, magnetic and optical storage media.
RAM : is memory chips that can be read from and written to by processor, called main memory.
ROM : is memory chips that store permanent data and instructions, nonvolatile, three types(Firmware, PROM, EPROM).
Computers are commonly classified by their processing power : Supercomputer, mainframes, midrange, workstations, Microcomputers, Computing appliances.

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