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Bog'liq
Data storage

Read only memory

  • ROM – random access memory device that can store data permanently or semi-permanently
  • Typically used to store BIOS (basic input output services)
  • Instructions stored in ROM is called firmware

Memory packaging

CPU Memory Access

  • Management of RAM is critical to performance of computer
  • Organization, access, and management or RAM is done by the operating system
  • How memory is accessed is large factor in performance of RAM

Physical memory organization

  • Main memory of any computer is a sequence of contiguous memory cells
  • Addressable memory – highest number storage byte that can be represented
    • Determined by the number of bits used to represent an address
    • If 32 bits used to represent and address, highest address is 232 = 4,294,967,296, or 4 GB
  • Physical memory – actual memory installed, usually less than addressable memory

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