Biostar M6VLR User Manual page 31

Chapter 1
Connectivity
The serial ports can be used in many ways, and it may be necessary to become
familiar with the pinout diagram. The following chart gives you the function of
each pin on the 9-pin connector and some of the 25-pin connector. This
information can be used when configuring certain software programs to work with
the serial ports.
Signal
DCD Data Carrier Detect
RX
TX
DTR Data Terminal Ready
GND
DSR Data Set Ready
RTS Request to Send
CTS
RI
Name DB9 PIN
Receive Data
Transmit Data
Signal Ground
Clear to Send
Ring Indicator
1-26
Motherboard Description
DB25 PIN
1 8
2 3
3 2
4 20
5 7
6 6
7 4
8 5
9 22