CHAPTER 2 HARDWARE INSTALLATION
2-16
2.9 Serial Port Connectors: COM A and COM B
The mainboard has a 9-pin male DIN connector for serial port COM A. This
port is a 16550A high speed communication port that send/receive 16 bytes
FIFOs. You can attach a mouse or a modem cable directly into this connec-
tor.
PIN SIGNAL
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
6 DSR(Data Set Ready)
7 RTS(Request To Send)
8 CTS(Clear To Send)
9 RI(Ring Indicate)
PIN DEFINITION
1 2 3 4 5
6 7 8 9
COM 1
Serial Port (9-pin Male)
Note: There’s another serial port connector (COM B), which is
located on the mainboard. Connect a serial port 9-pin male
port into this connector.
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