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The mainboard has two 9-pin male DIN connectors for serial port COM A
and COM B. These ports are 16550A high speed communication port that
send/receive 16 bytes FIFOs. You can attach a mouse or a modem cable
directly into this connector.
PIN DEFINITION
PIN
1
2
3
4
5
6
7
8
9
1 2 3 4 5
6 7 8 9
COM A
Serial Port (9-pin Male)
SIGNAL
DCD(Data Carry Detect)
SIN(Serial In or Receive Data)
SOUT(Serial Out or Transmit Data)
DTR(Data Terminal Ready)
GND
DSR(Data Set Ready)
RTS(Request To Send)
CTS(Clear To Send)
RI(Ring Indicate)
2-17
COM B
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