>>I recently aquired a couple of 8M SIMMs to increase my system's memory up
>>to 32M.  However, NetBSD 1.1B will not work now, and panics with a "ptdi:"
>>message right after "biomask, netmask, ttymask" when I boot with 32M
>>installed. 
>
>I wouldn't expect that exact result, but I believe there is a problem with
>your sound blaster.  The ISA bus only has 24 address lines (which allow for
>16 Mb of address space).  The Soundblaster uses DMA and is ISA, so any DMA
>request that happens to be above 16 Mb will cause a problem.  I believe
>NetBSD doesn't support bounce buffers, (like 95 and NT do I think).
>Normally you'll get a "DMA beyond end of ISA" message, but who knows...  It
>might be worth looking into.

That's only for the case of bus-mastering devices.  Cards that use the
ISA DMA controller (like the SoundBlaser and the floppy drives) are
bounced.

--Ken