26
C
C
o
o
n
n
n
n
e
e
c
c
t
t
i
i
n
n
g
g
I
I
/
/
O
O
D
D
e
e
v
v
i
i
c
c
e
e
s
s
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
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 + LAN
Black
SCSI, network, telephone, modem
None
This concludes Chapter 2. The next chapter covers the BIOS.
