How to configure the standard address of the RS 232 internal port on the ISA bus
(Original Document)
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At a Glance
The RS 232 internal port uses 8 consecutive addresses in the input/output (I/O) space on the ISA bus and an IRQ switch. Before configuring the port, it is appropriate to determine an input/output (I/O) space and a switch on the PC using the standard utilities on Windows XP or Windows 2000.
Procedure
A rotating micro-switch, whose position designates the internal communication port address, facilitates this configuration.
Step
Action
1
Select the position corresponding to the communication port address.
Note: This address should be the same as the one which will be configured by Windows.
Example
In this example, the TSX IBX 100 module has the address 3F8.
Address format
The position of the micro-switch defines the standard address as follows:
Position
Communication port
Address (hexa.)
Note
0
None
-
-
1
COM 1
3F8
Standard (1)
2
COM 2
2F8
Standard (1)
3
COM 3
3E8
Standard (1)
4
COM 4
2E8
Standard (1)
5
COM 5
250
Non standard
6
COM 6
258
Non standard
7
COM 7
260
Non standard
8
COM 8
268
Non standard
9
COM 9
270
Non standard
Key
(1)
In Windows XP/2000, the CMD Tool software installed on the host PC communicates only through ports COM 1 to COM 4.