Chapter 2
2-12
Serial Port Connector: COM A & COM B
The mainboard offers two 9-pin male DIN connectors for serial
port COM A and COM B. The ports are 16550A high speed communica-
tion ports that send/receive 16 bytes FIFOs. You can attach a serial mouse
or other serial devices directly to them.
Pin Definition
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 Inticate
1 2 3 4 5
6 7 8 9
9-Pin Male DIN Connectors
Midi/Joystick/Audio Port Connector
The mainboard provides a 15-pin female connector for connect-
ing a game joysticks/pads or MIDI devices.
The three ports at bottom provide the mainboard audio functions:
Line Out
is a connector for headphone or speakers.
Line In
is used for
external CD player, tape players or other audio devices to be recorded by
your computer or played through the Line Out.
Mic
is a connector for
the microphone.
L-out
L-in
MIC
Midi / Joystick
