> > At this point I will stand up on a tiny sopbox and humbly offer that you
> > examine the sun3x pmap.  It is based on a design that Gordon Ross
> > suggested, and I implemented, for the 68030.  It might overcome some of
> > these limitations.
>
> Oh, nice one. :)
>
> I had no idea that was in the source tree. It's exactly what's needed to
> solve the 040/060 problem. It actually does so in a similar way to how I'd
> envisioned doing it... ;-)
>
> If you don't mind, I'll mess around with it to add 680[46]0 support with a
> view to making this the base for a common m68k pmap.

Just some info: the example code in the pr
(http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=9725) does in
fact crash a 68040 Macintosh, but not a 68040 nor 68060 Amiga, even when
unlimited.

Hope this helps.

John Klos