Computer Memory Tutorial
TYPES OF MEMORY
RAM ROM
RAM: random access memory, Primary work area for CPU & app, Volatile memory...types areà
v SIP: Single Inline Package inserted in socket...
v DIP: Dual Inline Package have two sets of pin used in sockets...
v SIMM: 32 bit data path & connectors are on same side, usually 72 pins & 12 chips, used in slots...
v DIMM: 64 bit data path & connectors are not on same side...
CLASSES OF RAM:
Ram access speed can be measured in nano second, speed can be 10--200 ns...
1: DRAM: Dynamic RAM uses SIP, DIP, SIMM, Access time 30 ns or greator...
2: SRAM: Static RAM used in CACHE mem, 10--30 ns...
3: EDO: Enhanced Data Out consist of 72/168 pin, 50--70 ns...
4: SDRAM: Synchronous DRAM support CPU, with speed of 100 MB...
5: VRAM: Video RAM for Vieo display adapter...
6: CACHE MEM: A section of high speed mem which stores data that the comp can access quickly, when processor references an add in mem, it checks cache memory first. It’s of 2 kinds..
Ø a: L1:- A mem chache built in 486 processor, Pentium have two L1, for data & for code...
Ø b: L2:- A mem chache built on MB having SRAM, faster than sys DRAM but slower than L1...
7: VIRTUAL MEM: Hard Disk is used as memory, when the real memory is low to run programs.
ROM Read Only Memory
