On Fri, 19 Mar 1999, Dr. Bill Studenmund wrote:

> As for NuBus, it's different from ISA. Each NuBus card is assigned a
> chunck of the address space, based on its slot. For instance, in a Mac
> IIci, any card in slot C has a full meg assigned to it in 24-bit
> addressing, and a full 256 MB in 32-bit addressing. In 24-bit addressing,
> it's at 0xc00000->0xcfffff. It doesn't matter what card it is, it's in the
> same place in the address space.

Actually, in 32-bit addressing, there's an additional "Superslot" space
reserved for each card, too!  In 32-bit mode, there's the regular space
at 0xfs000000 thru 0xfsffffff (where s is the slot number), plus
superslot space at 0xs0000000 thru 0xsfffffff


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