Serial ports
The SBC-455 offers two RS-232 serial ports. You can select or disable the address for each port with the BIOS Peripheral Setup program.
The card mounting bracket holds COM A, the DB-9 serial port connector for the first port. The parallel port and serial port adapter kit (supplied with the card) holds COM B, the DB-9 connector for the second port. This lets you connect and discon- nect the cables after you install the card. The following sections tell how to make RS-232 connections.
RS-232 connections (COM A, COM B)
The following table shows the pin assignments for the card's RS-
232 ports:
RS-232 connector pin assignment (COM A, COM B)
Pin Signal
1DCD
2RX
3TX
4DTR
5GND
6DSR
7RTS
8CTS
9RI
