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Motherboard. Computer Peripherals First Semester Second year Faculty of computers and information. Peripheral devices. Main devices VGA card, CPU, Power supply, RAM, … Secondary devices Mouse, Speakers, CD drive, …. Motherboard.

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Computer Peripherals

First Semester

Second year

Faculty of computers and information

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Peripheral devices

  • Main devices VGA card, CPU, Power supply, RAM, …

  • Secondary devices

    Mouse, Speakers, CD drive, …

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  • Also called mainboard

  • Logical concept:

    • The infrastructure of power and data of the computer.

  • Physical concept:

    • A multilayer printed circuit.

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  • Connections to motherboard:

    • Direct connections

      - Cards connections

    • Indirect connections

      - Hard disk connections

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Motherboard Components

PS/2 Mouse& Ps/2 Keyboard Connector

LPT 1 Printer Port

AGP Expansion Slot

CMOS Battery

USB Port


ATX Power Connector

PCI Expansion Slots

CPU Socket 370

DIMM Memory Sockets

Floppy Drive Controller



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Motherboard components

1. Buses

Data bus

Address bus

Control bus





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Motherboard components

2. RAM banks (Ram slots)

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Motherboard components

3. Processor socket

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Motherboard components

4. IDE Controllers ( ATA or PATA cable)

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Motherboard with SATA


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Motherboard components

5. BIOS (Basic Input/Output System)

- considered a ROM

- perform POST (Power On Self Test).

- responsible for operating the computer until loading OS.

- responsible for recognizing any new hardware.

- responsible for the basic input and output operations.


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Motherboard components


- A small memory with a battery.

- responsible for saving some important information such as date, time and password.

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Motherboard components

7. PCI slots and AGP slot

- AGP :Accelerated Graphics Port

- PCI :Peripheral Component Interconnect

- for connecting various cards

( sound, fax and VGA cards ).

- Sound and VGA cards may be built-in

Adv:- Sheep


- sound card : no problem

- VGA card : needs its own memory, it will be from main memory

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Motherboard components

8. ATX Power Connector

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Motherboard components

9. ChipSet

A set of chips that provides the interfaces between all of the PC's subsystems. It provides the buses and electronics to allow the CPU, memory and input/output devices to interact.

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Motherboard components

10. PS/2 Mouse and Keyboard Connector

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Motherboard components

11. parallel port

( LPT 1 Printer Port )

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Motherboard components

12. Serial Ports

( Com1 and Com2 Ports )

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Motherboard components

13. USB Ports

( Universal Serial Bus )

- USB 1.0 , USB 1.1

12 Mbps

- USB 2.0

480 Mbps

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Motherboard components

14. North Bridge and South Bridge

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Motherboard components

VGA card



North Bridge

South Bridge

Hard disk




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Motherboard components

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Motherboard components

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That’s it!

Thanks for your attention

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