> I believe this is the source of the issues I encountered on my initial > attempt to decouple the X86_32 dependency from the ISA option. I suspect > if I add an explicit X86_32 dependency to the PNPBIOS driver, I will be > able to remove the X86_32 dependency from the ISA option without > incident from the other drivers.
That would be correct. PnPBIOS is obsoleted by ACPI so a 64bit x86 platform shouldn't be using PnPBIOS nor anything non x86. Strictly speaking PnpBIOS is not ISA, it's onboard devices. ISA devices that can be enumerated are usually enumerated via ISAPnP which is platform independent. Quite a few of the ISA drivers if you review them more carefully have other endian and size assumptions, IRQ assumptions and probably fun bugs because they've simply never been run on anything else even when it is possible. Alan
