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The backplane of the motherboard has the following I/O ports:
PS/2 Mouse
PS/2 Keyboard
LPT1
COM1
Audio Ports
LAN Port
(optional)
USB Ports
External Connector Color Coding
Many connectors now use standard colors as shown in the table below.
Connector
Audio line-in
Audio line-out
Microphone
Parallel
PS/2-compatible keyboard
PS/2-compatible mouse
Serial
USB
LAN
This concludes Chapter 2. The next chapter covers the BIOS.
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Use the upper PS/2 port to connect a PS/2 pointing device.
Use the lower PS/2 port to connect a PS/2 keyboard.
Use LPT1 to connect printers or other parallel communica-
tions devices.
Use the COM ports to connect serial devices such as mice
or fax/modems. COM1 is identified by the system as
COM1/3.
Use the three audio ports to connect audio devices. The
first jack is for stereo line-in signal. The second jack is for
stereo line-out signal. The third jack is for microphone.
Connect an RJ-45 jack to the LAN port to connect your
computer to the Network.
Use the USB ports to connect USB devices.
Light Green
Teal or Turquoise
23
Color
Light blue
Pink
Burgundy
Purple
Green
Black
Black
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