I switched to NetBSD from Linux, and I have some problems with my own
   device drivers.  I am sure I am doing something wrong.  

   If I have a card at 0xd0000, does

	   ISA_HOLE_VADDR(0xd0000)

   then get me to the memory on that card?

Yes.  This interface is going to change at some point, though.

   Is that ISA hole in virtual
   memory contiguous between 0xa0000 and 0xeffff?

Yes.

   The io ports need no translation, right?

Yes.

BTW, what devices are these drivers for?