VXC-114U/144U/144iU User’s Manual (Ver. 1.2, Mar.11, 2009) -----12
2.2 COM Port Mapping and Board ID
The Board ID and COM port mapping are the same, which is set by the SW1 DIP switch.
The SW1 DIP switch has different functions under different OS.
For
DOS
users, the SW1 DIP switch acts as
Board ID
. When there are two or more multi-
port serial cards in a single system, it is difficult to identify individual card number. For easier
identification, the VXC series card includes a Board ID function.
For
Windows
users, the SW1 DIP switch acts as
COM port number selector
and the COM
port number is depending on the Board ID. If the Board ID is 0, then the driver finds a valid
number for each port. If the Board ID is not 0, then the driver uses the “
Board ID
” to be the first
COM port number and uses the “
Board ID +1
” to be the next COM port number and so on.
Note:
It’s recommended to select a unique COM port number (Board ID) by users. This
helps users to clear identify and fix the card-number and port-number in a system.
Warning:
The port will not work if the COM port number is conflicted under Windows or Linux
system. In that case, users should try other COM port numbers.
Usually, the COM1 and COM2 are reserved by systems. And it’s recommended to
reserve the COM3 and COM4 if you will have other Plug&Play serial ports in the future.
This prevents conflict.
For
Linux
users, it’s the same as Windows users but for
TTY device number selector
.
The configuration examples are as follows.
SW1
