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The backplane of the mainboard has the following I/O ports:
PS/2 Mouse
Use the upper PS/2 port to connect a PS/2 pointing device.
PS/2 Keyboard
Use the lower PS/2 port to connect a PS/2 keyboard.
LPT1
Use LPT1 to connect printers or other parallel communica-
tions devices.
COM1/2
Use the COM ports to connect serial devices such as mice
or fax/modems. COM1 is identified by the system as
COM1/3. COM2 is identified by the system as COM2/4.
Audio Ports
Use the three audio ports to connect audio devices. The left
side jack is for a stereo line-out signal. The middle jack is for
a stereo line-in signal. The right side jack is for a micro-
phone.
LAN Port
Connect an RJ-45 jack to this port to connect your PC to the
LAN.
USB Ports
Use the USB ports to connect USB devices.
External Connector Color Coding
Many connectors now use standard colors as shown in the table below.
Connector
Audio line-in
Audio line-out
Microphone
MIDI/game
Parallel
PS/2-compatible keyboard
PS/2-compatible mouse
Serial
USB + LAN
SCSI, network, telephone, modem
This concludes Chapter 2. The next chapter covers the BIOS.
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Teal or Turquoise
26
Color
Light blue
Lime
Pink
Gold
Burgundy
Purple
Green
Black
None
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