MSI MS-98B5 Manual page 24

Hardware Setup Hardware Setup
RS-232/422/485 Serial Port

The seral port s a 16550A hgh speed communcatons port that sends/ receves
16 bytes FIFOs. You can attach a seral mouse or other seral devces drectly to
the connector.
RS-232
PIN
1
2
3
4
5
6
7
8
9
2-10
SIGNAL DESCRIPTION
DCD Data Carrier Detect
RXD Receive Data
TXD Transmit Data
DTR Data Terminal Ready
GND Signal Ground
DSR Data Set Ready
RTS Request To Send
CTS Clear To Send
VCC_COM1 Voltage select setting by jumper
RS-422
PIN SIGNAL DESCRIPTION
1 422 TXD- Transmit Data, Negative
2 422 RXD+ Receive Data, Positive
3 422 TXD+ Transmit Data, Positive
4 422 RXD- Receive Data, Negative
5 GND Signal Ground
6 NC No Connection
7 NC No Connection
8 NC No Connection
9 NC No Connection
RS-485
PIN SIGNAL DESCRIPTION
1 485 TXD- Transmit Data, Negative
2 NC No Connection
3 485 TXD+ Transmit Data, Positive
4 NC No Connection
5 GND Signal Ground
6 NC No Connection
7 NC No Connection
8 NC No Connection
9 NC No Connection