Chapter 2
2-10
Serial Port Connectors: COM A & COM B
The mainboard offers two 9-pin male Serial Port connectors (COM A and COM
B) . You can attach a serial mouse or other serial devices directly to these ports.
1 2 3 4 5
6 7 8 9
PIN
SIGNAL
DESCRIPTION
1
DCD
Data Carry Detect
2
SIN
Serial In or Receive Data
3
SOUT
Serial Out or Transmit Data
4
DTR
Data Terminal Ready)
5
GND
Ground
6
DSR
Data Set Ready
7
RTS
Request To Send
8
CTS
Clear To Send
9
RI
Ring Indicate
9-Pin Male DIN Connectors
Pin Definition
Joystick (MIDI) Connector
You can connect a joystick or game pad
to this connector.
Audio Port Connectors
Line-Out
is a connector for speakers or
headphones. The
Line-In
connector
can be used for an external CD player,
tape player, or other audio devices. The
Mic-in
connector is for connecting
microphones.
1/8” Stereo Audio Connectors
Line Out
Line In MIC
Note:
Details on the application of onboard 6-channel audio (VIA P4XB-
RA only) can be acquired by installing the CMI8738 Audio Driver on the
CD-ROM (enclosed in the product package).