It's been a while since I asked about this, and it's suddenly become
more important to me.  Does anyone have a first pass at making this
work with NetBSD, that I could work from?

I've looked at
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/rp/rp_isa.c?rev=1.5&content-type=text/x-cvsweb-markup
but I'm not sure where to start to port it, not having done such before.

-Tracy