Quoting Terry Lambert,

> I would further argue for abstracting into service support routines
> the concepts of bus mustering DMA, device register manipulation, and

Which brings us to something else: bounce buffers. It would be nice
if MI code for ISA would deal with this. This digs a little deeper than
just device drivers of course. But if ISA devices are going to be used
for several ports of NetBSD, solving this problem will become more
important.

- Frank