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Thursday, December 25, 2008

Main memory or Primary memory

Main memory or Primary memory

Ø Read only Memory

Ø Random Access Memory

Ø Cache Memory

Read only Memory (ROM)

    • Read Only Memory.
    • Used for storing programs & data permanently.
    • User may read data from ROM but may not write on ROM.
    • Permanent or Nonvolatile memory

Random Access Memory (RAM)

Ø Temporary storage that can be read from or written into by the user.

Ø Used primarily to store user programs and data.

Ø Temporary or Volatile memory.

Ø Determines a computer’s speed and power

Ø 2 types of RAM:

Static RAM

Dynamic RAM

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