SCL GROUP PRESENTATIONSSK 3207 COMPUTER ORGANIZATION

AND ASSEMBLY LANGUAGELecture Topic : Computer Memory System

Sub-Topic : Internal Memory

Lecturer : DR. SHARIFAH BINTI MD YASIN

GROUP 1SEOW TZE PINLAI JEN YANG

IVAN BOOI CHUNG RENLOO JIAN HAOSIA CHIN SHIN

COMPUTER INTERNAL MEMORYis the data that stored by system at computer startupuse to run various types of programsdirectly accessible to CPUcan access information faster by CPU compared to external memory

TYPES OF INTERNAL MEMORY1) Processor Cache2) Random Access Memory (RAM)3) Read Only Memory (ROM)4) Video RAM (VRAM / Graphic Card)5) Virtual Memory6) Boot Memory

1) Processor Cacheis the memory that used by computer processor to controls the access of data from Random Access Memory (RAM)is use to increase the performance of computeris the intermediate stage between ultra – fast register and the slow main memory

consists of L1 cache and L2 cache

L1 cacheholds data that is needed to execute instruction by computer processorsmallest and fastest

L2 cachepull information from system’s memory so that can be accessed by L1 cachebigger and slower

2) Random Access Memory (RAM)small in size, light in weight, but costlycan be read and written (modified)is a type of volatile memory, it loses it’s content when electricity supply wiped out

Example:

Operating system uses RAM to store running program so that system doesn’t need to access hard drive oftenly

3) Read Only Memory (ROM)

can only be read, cannot be writtenIs a type of non-volatile memory that is used to bootstrap computer when turn on the computer

4) Video RAM (VRAM)contained on graphics card or shared on RAMUsed to store information that sent to a display deviceEg : Moniterstore graphics data instead of using system memory when games

5) Virtual Memory

much slower compared than physical memoryis a place to store data program when physical memory is fullcan be determined by system automatically or manually set by user

6) Boot Memory

as known as flash memoryIs a small amount of memory to store BIOS ( Basic Input / Output System)