You say that the card is from Digi Corp, and appears to be some sort of serial networking card. You also said that upon removal of the card, the system was fine.
Before reading further, ask yourself this question: WHY do you want to migrate theLegacy card into the new system. If you aren't even sure what it does, and the system works fine without it, what is the reason for trying to get it to migrate anyway? If it is a Legacy device it will undoubtedly slow your system down. If you don't need the functionality of the card in the new system, evaluate whether it is really to your benefit to devote more time and resources to resolving this issue.
Assuming you have a valid reason to try and get the darned thing to work...
The farther we get from DOS and into the new OS's, the more difficult it is to migrate Legacy devices from old systems to new ones.
In theory, it's a good idea ... buy just what you need and take what still works on the old system and migrate it to the new. However, in reality it can cause configuration nightmares.
Legacy devices frequently required manual configuration of the DIP Switch settings before installation to place calls for specific System Resources upon booting up.
A conflict occurs when the Legacy device & the BIOS try to place a call for the same resources.
To test this, remove the card and boot the system. Look through the Resource assignments in the Control Panel, Device Manager.
Jot down all the IRQ andDMA assignments, including the I/O addresses.
Examine the card you pulled from the system & look for DIP Switches [small toggle switches, or small pin jumpers].
Note how they are configured [there is almost always an indicator printed on the card as to how to set the DIP Switches in order to set the card to specific configurations]. If the card & the BIOS are competing for the same resources, there's your problem.
