I have a computer that needs to use three parallel ports for a very special purpose. The ports consist of the main port featured in its motherboard, and two additional ports provided by a PCI (not PCIExpress) card.
Anyway, for very specific reasons, those cards need to be installed within the range of ISA legacy addresses. These traditionally are 278, 378 and 3BC. The port belonging to the motherboard poses no problem. I can easily configure said address through BIOS during startup.

The problem is that when I go to the computer's device manager (OS is Win7, 32 bits) and try to change the other two ports' base addresses they are shown, but the dialog box won't allow me to adjust them manually. (I can't post a picture of said dialog at this moment). The box does show an "automatic configuration" checkbox which is checked, but it's grayed out and disabled.

Is there another way I could change those addresses? Say, maybe through the registry? The card's drivers have nothing in them that could help me either.

@MrSoftware

 

What cards are being used. It's been a while but I seem to remember you need hardware mapped ISA addressing translation on the PCI card for legacy I/O ports.
https://www.startech.com/support/PCI1PM

 

What cards are being used. It's been a while but I seem to remember you need hardware mapped ISA addressing translation on the PCI card for legacy I/O ports.
https://www.startech.com/support/PCI1PM

I forgot to add, that I've done it before on other cards. It's just that this is the first time I've seen that feature disabled. I'll look up the card type (chipset) tomorrow and post it here. Thanks!

 

Wow it has been a while since I've had to manually set addresses on cards! My guess is it's the driver or the driver and chipset combination that is not allowing you to manually configure the addresses. The easiest route might be to try to find a card that explicitly allows manual configuration, preferably one with jumpers. This was one of the top google results, I don't know if it's any good or not, and of course you would need multiples for your case:
https://www.startech.com/support/PCI1PM
https://www.ebay.com/c/1443963637