IRQ settings
Remember the early days of Plug and Play? AKA Plug and Pray...?
Oh yes - and not only on ISA. I still remember the trouble making the FAST AV master card working with some hardware. A PCI card, but It needed it's own unique interrupt vector, otherwise the system would just crash. Drivers available only for Win9x and WindowsNT... For a while I kept an old PC with Win98 around, just for keeping the card alive, but at some point analogue video editing became quite pointless.
The good/bad old days... Proprietary hardware and bad driver support are luckily a thing of the past now.
Oh, wait...