1. MOTHER BOARDS  The spine of the Computer is System Board,Otherwise knows as Mother Board.  System Board interconnect the entire peripherals in the PC  On the System Board you will find the CPU Socket, Expansion Slots, Video components, Memory Banks, BIOS, CMOS Battery,Integrated I/O Circuitry, Cache Memory and other supporting chips.

2. MOTHER BOARDS CLASSIFICATION  BASED UPON THE FORM FACTOR  PC – XT  PC – AT  BABY- AT  ATX  MICRO ATX

3. MOTHER BOARDS BLOCK DIAGRAM OF NON-INTEGRATED MOTHERBOARD SOCKET FOR CPU CMOS BATTERY BIOS IC POWER CONN. EXPANSION SLOTS KBD CONN. MEMORY BANKS PCB

4. MOTHER BOARDS BLOCK DIAGRAM OF INTEGRATED MOTHERBOARD BIOS IC SOCKET FOR CPU CMOS BATTERY POWER CONN. EXPANSION SLOTS KBD CONN. MEMORY BANKS PCB VGA SOUND COM1 COM2 LPT1 HDD CONTROLLER FDD CONTROLLER

5. MOTHER BOARDS MOTHER BOARD NON -INTEGRATED INTEGRATED i.PROCESSOR SOCKET ii.MEMORY MODULE iii.EXPANSION SLOTS iv.POWER CONNECTOR v.BIOS & CMOS BATTERY i.SERIAL PORT CONTRL. ii.PARRELLEL PORT CON. iii.FDD CONTROLLER iv.HDD CONTROLLER v.DISPLAY CONTROLLER vi.SOUNDCARD CONTROL.

6. MOTHER BOARDS Hard Disc, FD Controllers BIOS Socket for cpu RAM slot Expansion slots To Monitor To Mouse speakers USB

7. MOTHER BOARDS Hard Disc, FD Controllers BIOS Socket for cpu RAM slot Expansion slots To Monitor To Mouse speakers USB

8. MOTHER BOARDS PROCESSOR INTERFACE i.SLOT TECHNOLOGY : - This type of slot is specially meant for SEC type connector processor which it can be mounted on its own integrated circuit ( IC ) board contact to connect to the motherboard ii.SOCKET TECHNOLOGY :- This type of interface is specially designed for PGA chip type processors. The processor chip directly plugs directly in to the socket of motherboard. The other name for socket is also called Zero Insertion Force Socket.

9. MOTHER BOARDS SLOT TYPE SOCKET TYPE

10. SLOT NO. NO. OF PINS CHIP SUPP. 1 242 P- II, CEL, P-III 2 330 P-II XEON A 242 AMD-ATHLON MOTHER BOARDS

11. SOCKET NO. NO. OF PINS CHIP SUPP. 478 478 P-IV 423 423 P-IV 370 370 CELERON,P-III 7 321 P-I 75 – 266 Mhz 6 235 486DX4 5 320 486 4 273 P – I 60/66 Mhz 3 237 486 SX,DX,DX2 2 238 486 SX,DX2 1 169 486 SX,DX

12. MOTHER BOARDS MEMORY BANKS i.SIP - Single Inline Package ii.DIP - Dual Inline Package iii.SIMM - Single Inline Memory Module iv.DIMM - Dual Inline Memory Module v.DDR - Double Date Rate module vi.RIMM - Rambus Inline Memory Module

13. MOTHER BOARDS MEMORY BANKS Memory Banks No. of Pins Color SIP - - DIP 10 - SIMM 30,72 white DIMM 168 black DDR 184 blue RIMM 184 black

14. MOTHER BOARDS EXPANSION SLOTS The New Developments such as Printer, Drives, Web camera, Scanner etc. is to be connected to the Motherboard. This connection point is the Expansion Bus sometimes called Input Bus.

15. MOTHER BOARDS TYPES OF EXPANSION SLOTS i.ISA - Industry Standard Architecture ii.MCA - Micro Channel Architecture iii.EISA/VESA - Extended ISA / Video Electronics Standard Arc. iv.PCI - Peripheral Component Interconnect v.AGP - Accelerated Graphical Port vi.CNR - Communication Network Raiser vii.AMR - Audio Modem Raiser viii. PCMCIA - Personnel Computer Memory Card Industry Architecture

16. MOTHER BOARDS TYPES OF EXPANSION SLOTS SLOTS SPEED COLOR ISA 8 – 16 bit, 2 bytes Black MCA 32 bit Black EISA/VESA. 32 bit Brown PCI 32 bit, 132 MB /sec White AGP 64 – 128 bit, Brown CNR - Brown AMR - Brown