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The backplane of the motherboard 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
Use the COM ports to connect serial devices such as mice
or fax/modems. COM1 is identified by the system as
COM1/3.
Audio Ports
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.
LAN Port
(optional)
Connect an RJ-45 jack to the LAN port to connect your
computer to the Network.
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
Color
Audio line-in
Light blue
Audio line-out
Light Green
Microphone Pink
Parallel Burgundy
PS/2-compatible keyboard
Purple
PS/2-compatible mouse
Green
Serial Teal
or
Turquoise
USB Black
LAN Black
This concludes Chapter 2. The next chapter covers the BIOS.