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M luqman khan
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M luqman khan

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Lahore Leads University

Lahore Leads University

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  • 1.  Name: M LUQMAN KHAN. Program: BSCS (A) ROLL NO: F12-1141
  • 2.  Main Memory Main Memory Organization Main Memory Capacity Random Access Memory Read only-Memory Programmable Read-only Memory Erasable Programmable Read-only Memory Cache Memory
  • 3.  Every main memory is directly attached to the motherboard .  Every computer can not display the result with out main memory.
  • 4.  Storage Capacity Access Time Cost per bit of storage Volatile Random Access
  • 5.  A primary storage or main memory of computer system is made up of several small storage area called location or cell. Each of these location can be store a fixed number of bit called word length of the memory.
  • 6.  Main memory capacity of a large computer system is normally more then that of smaller system. Memory capacity normally stated Kilobytes 1024 (bytes) Megabytes 1048576(bytes) Gigabytes 107374824 (bytes)
  • 7.  RAM is the volatile memory. RAM memory consist of some integrated circuit chip either on the motherboard or on a small circuit board attached to the motherboard.
  • 8.  A special type of RAM called ROM. It is non-volatile memory chip in which data to stored permanently. Data store in a ROM chip can not be change.
  • 9.  There are tow types of PROM. A manufacturer programmed ROM one which data is burnt in by the manufacturer of electronic equipment. A user PROM is which a user can load and store “read-only” programs and data.
  • 10.  There are tow types. Ultra violet EPROM Electrically EPROM Flash memory
  • 11.  The Cache memory is a small memory directly accessible by the processor. Small size, extremely fast. When ever data is required by the processor it first checks in the Cache. Current cache size is 2MB or more.