> Base addresses are assigned by PCI config space code in HAL -
> HalAssignSlotResources function.
No, IRQs and BASE addresses are most certainly set up by the BIOS. If you
set PnP OS=yes, then the BIOS may (often does) skip this mapping and leave
it to the O/S but NT in not famous for getting this right.
If you are not convinced, take a closer look at, say, an older Linux
kernel. You can see from the source that all PCI configuration is taken
from the BIOS, yet devices still get mapped. Newer Linux kernels are
starting to take over this mapping(*), but still a device cannot depend
(*) Existing BIOSes have proven to be almost as buggy as NT on this score:-)
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