Itr3 lecture 3: the motherboard

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Itr3 lecture 3 the motherboard

• Thomas Krichel
• 2002-10-01

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Structure

• Like a jackson pollock painting.

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Literature

• Norton new inside the PC chapter 5

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Opening a PC

• Voltages used in the PC are 3 to 5 V
• Be aware of static electricity, touch first
• Unpainted part of case
• Power supply
• Keep power cable plugged in a grounded socket
• Never open sealed part of the power supply

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Basic parts of a PC

• Display
• Input
• Keyboard
• Mouse etc
• System Unit
• Logic system
• Display system
• Storage system
• Input output system
• Communication system

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Logic system

• Motherboard green plastic sheet with traces and
  slots, usually complying to a standard called
  plug and play
• Jumpers can set key features
• CMOS or flash memory
• Powered by battery
• holds the Basic Input Output System
• Central Processing Unit socket
• Main memory socket
• Bus (set of all other slots)

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Other components

• The display system
• Video card
• Storage system
• Hard disk
• Floppy disk
• CD-rom
• CD-R
• CD-RW

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Other components

• Keyboard and mouse
• Parallel port
• Parallel because it can move a whole byte at a
  time
• Mainly used for connection to a printer
• Nowadays it can handle bidirectional traffic, but
  not practical for non-printer devices
• Serial port
• One bit at a time -- Uses thin cable
• Slow -- inexpensive
• Universal serial bus (USB) or IEEE 1394.

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Other components

• Modems, allow communication over a phone line
• Internal modems with own serial device
• External modem
• It squeaks
• Network interfaces

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Organized working

• Track parts taken out
• Be careful to align ribbon cables properly
• Check it is not put the other way round
• Check that the alignment is correct
• Be careful with shorting jumpers
• Do not short the wrong thing

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Slots and sockets

• Integrated Drive Electronics
• Dual in-line memory modules (DIMM)
• Cable connectors
• Chipset sockets
• Industry standard architecture, ISA, since 1984
  AD, 16 bit at a time
• Peripheral component interconnect, PCI, 32 bit at
  a time
• Advanced graphics processor, AGP

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http//openlib.org/home/krichel

• Thank you for your attention!

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