How to change COM port address

[nino954]

On my computer, HP Vectra VL 5/133 series 4, with Windows 98 SE, there are 2 Serial Ports: Port A (=COM1, addres 03F8 IRQ 4) and Port B (=COM2, address 02F8 IRQ 3).
I use a software - which works fine - to manage the POS (point-of-sales) and is connected to the Cash register throu port A (address 03F8).
For some reason, port A doesn't work anymore.
Since it is not possible redirect the software to port B, I have tried to invert the address of the ports, in order to direct port A to address 02F8 IRQ3 and port B to address 03F8 IRQ4.
I did it in the BIOS successfully but then, as soon as Windows starts, it re-change the addresses.

Can someone help me?

Many thanks.

Nino Frezza, Italy

 

[CitrixEngineer]

Remove the COM port in Device Manager, reboot the machine, then set the required values in the BIOS. When you next start Windows, it should re-create the COM port based on the new values.

Hope this helps