I noticed a question on the sh3 list, but no reply. It sort of applies
here too.

sh4 is the chipset in Dreamcast.

http://www.softrare.com/openbsd-sh4/

"As an applied bonus, we are able to use the NetBSD/sh3 port as a
base for our work.  Hopefully when we finish this project,
we will have a stable SH4 release for the NetBSD and OpenBSD development
teams. "

-- 
David Maxwell, david@vex.net|david@maxwell.net -->
Any sufficiently advanced Common Sense will seem like magic... 
					      - me