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2-11
Hardware Setup
Serial Port Connectors: COMA & JCOM1
The mainboard offers two 9-pin serial ports COMA and JCOM1. All
ports are 16550A high speed communication ports that send/receive 16 bytes
FIFOs. You can attach a serial mouse or other serial device directly to them.
COMA
1 2 3 4 5
6 7 8 9
VGA Connector (for 865GM3 Series only)
The mainboard provides a DB 15-pin female connector to connect a
VGA monitor.
Pin Signal Description
1 RED
2 GREEN
3 BLUE
4 N/C
5 GND
6 GND
7 GND
8 GND
9 +5V
10 GND
11 N/C
12 SDA
13 Horizontal Sync
14 Vertical Sync
15 SCL
VGA Connector
(DB 15-pin)
1
5
11
15
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
Pin Definition
JCOM1
12
9