Presentation on primary storage devices
- 1. PRESENTATION ON PRIMARY STORAGE DEVICES MADE BY :- SUSHANK PANDEY PRITISH SHEKHAR
- 2. PRIMARY STORAGE DEVICES • PRIMARY STORAGE ,also called main memory Or immediate access store (IMAS) is a group of chips that resides in the motherboard of the computer.
- 3. PRIMARY STORAGE DEVICES • PRIMARY STORAGE device consists of two types of memory chips : 1.RANDOM ACCESS MEMORY 2.READ ONLY MEMORY Did you know? A memory chips is an integrated circuit(IC) made up of million of transistors and capacitors.
- 4. 1.RANDOM ACCESS MEMORY(RAM) Hold data and instructions (programs) temporarily while processing is taking place. It also holds the data that results from processing. Programs and data stored in secondary storage must therefore first be loaded into the RAM before they can be processed.
- 5. RANDOM ACCESS MEMORY(RAM) RAM is volatile :it is temporary and changeable. RAM are limited in storage capacity. RAM are expensive and are a major determinant of the final price of a computer.
- 6. RANDOM ACCESS MEMORY(RAM) Contains instructions that are fixed at the time of manufacture . Instructions stored in ROM are always there , whether the power. ROM is therefore non-volatile : it cannot easily be changed ,because it is read only.
- 7. 2.READ ONLY MEMORY(ROM) ROM chips holds data and instructions necessary for starting up the computer when it is switched on. It is commonly used to store system-level programs such as BIOS (basic input/outputsystem )program.
- 8. READ ONLY MEMORY(ROM) Contains instructions that are fixed at the time of manufacture . Instructions stored in ROM are always there, whether the power is on or not. ROM is therefore non-volatile:it cannot easily be changed ,because it is read only.