@ Golem

Thanks for the response. I've been a little confused on the issue since, as I've mentioned, I used to work for a company that teamed PC ISA cards with a 68K motherboard (and ignored the BIOS).

That why I was concerned that a BIOS would be a requirement for anything other than a video card.

And I appreciate your response about drivers. That's all I assumed would be necessary for cards without a BIOS. Sure you don't have the benefit of the computer having plug and play capable notification that drivers need to be loaded, but I've set up drivers manually before.

So, other than video cards, do other cards (like the SCSI cards that work in the Pegasos) have to have an Apple compatible BIOS (or can drivers simply be loaded)?