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The backplane of the mainboard has the following I/O ports:
PS/2
mouse
PS/2
keyboard
USB
ports
Parallel port (LPT1)
Serial port
COM 1
Serial port
COM 2
Line-in
Game port
Microphone
Line-out
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.
USB Ports
Use the USB ports to connect USB devices.
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.
Game Port
Use the game port to connect a joystick or a MIDI device.
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.
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 Lime
Microphone Pink
MIDI/game Gold
Parallel Burgundy
PS/2-compatible keyboard Purple
PS/2-compatible mouse Green
Serial Teal or Turquoise
USB Black
This concludes Chapter 2. The next chapter covers the BIOS.
22
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