> here's how the PCI specification labels expansion ROM code:
>
> Intel x86, PC-AT compatible

That would be amigadave's "Windows bios", I guess ;-)

> Open Firmware standard for PCI
> [...]
> Open Firmware is not specific to PowerPC, although there
> are platform specific bindings for PowerPC.

True. It's just that PPC is the only relevant architecture in terms of OpenFirmware based Mac OS as well as MorphOS.
Btw, do you know why Mac graphics cards or Mac ROM reflashed PC graphics cards don't work on Pegasos or Efika 5200B?

>> or on PPC hardware with x86 emulator incorporated into the
>> computer's firmware.

> And many other platforms.

Yes, you're right of course. I was just restricting my addition to PPC because that's what's relevant in a MorphOS context (i.e. Pegasos I/II, Efika 5200B).