Changing the Base Address & Interrupt Under Windows 95, 98 & ME:

1. Double click on control panel.
2. Double click on "System"
3. Click on the "Device Manager" tab
4. Double click on "Ports (COM & LPT)
5. Double click on what port you wish to change (Such as "Communications Port (COM3)" for example).
6. Click on the "Resources" tab
7. If the "Use automatic settings" box is checked, uncheck it.
8. Click on "Setting based on", and change to "Basic configuration 8"
9. Highlight "Input/Output Range" if you wish to change the base address, or "Interrupt Request" if you wish to change the IRQ for the port.
10. Click on "Change setting..."
11. Select the base address or IRQ you want for the port, and then click "OK"
12. Click "OK" again.
13. Your system should now say, "You have made changes to your hardware. Before your device will work properly, you must shut down Windows..." "Do you want to shut down now?" Click "Yes".
14. If you haven't already, be sure to change the jumper settings on the card to indicate what the proper interrupt & base address are.
15. When you boot your system back up, all changes should have taken effect.

If the port(s) haven't yet been installed:

If you go to the Control Panel, and select "Add New Hardware", you will be given the option of having Windows search your system for new hardware, or to let you manually enter and configure the new hardware. It is generally recommended to let the system search for new hardware. This way, all new hardware is automatically configured, and the interrupts are automatically detected. If you are unable to use the "search for new hardware" option due to lockups or other problems, however, you may need to do the following steps.

1. Choose Control Panel from the Start-setting menu.
2. Double-click "Add New Hardware"
3. Choose "Next"
4. Select "No" when it asks if you want to search for new hardware.
5. Choose Next. On the following page, choose "Ports (COM & LPT)".
6. To add a new COM port, double click on "Communications Port". For a new LPT port double click on "Printer Port". To add an enhanced ECP printer port, click on "ECP Printer Port".
7. Please ignore any incorrect settings displayed such as a wrong base address or wrong interrupt, and click on "Next" and then "Finish".
8. Back in the Control Panel, double click on "System" and then choose the Tab "Device Manager".
9. In the Device Manager open the "Ports" section and highlight the port you just added. Then, click on "Properties".
10. In the Properties of the newly added port, choose the "Resource" Tab.
11. If "Use automatic settings" is checked, un-check it.
12. Change the "Setting based on" field to "Basic configuration 8" for COM ports. If you are using an IRQ for the parallel port, select "Basic configuration 1" for the parallel port. If you are not using an IRQ for the parallel port, you can leave this setting at "Basic configuration 0".
    Please note that most peripherals do not require an interrupt for the parallel port. You can usually remove the IRQ jumper for the parallel port, and just not notify Windows of an IRQ at all (To not notify it of an IRQ, simply leave it set to "Basic configuration 0").
13. Now, it is possible to change the base address and IRQ settings to the correct value by clicking on "Input/Output Range" or "Interrupt Request" and then clicking the "Change Setting" button. (You can only change the IRQ for the Parallel Port if you changed it to "Basic configuration 1")
14. Leave the Device Manager with "OK", and then reboot the machine. After the reboot, you can view the settings again in the Device Manager. They will be correct now. If Windows finds a problem it will display a "!" beside the COM-Port or LPT-Port.