Re: problems with 3.7 snapshots

Riccardo Mottola <[email protected]> wrote:

> > A lot of work has gone into the OpenBSD/mac68k port for 3.7, but
> > unfortunately, 68030 support was one of the casualties of this work.
> > Honestly, due to the performance of the 68030 machines when running
> > a modern OS, I don't think there is much excitement about repairing
> > this issue.  If you develop a fix and send it in and it doesn't
> > break the Quadras that now work, we'll commit it happily, but I
> > doubt we'll spend huge amounts of time on it.  That kind of work
> > gets really painful.
> 
> I undertand. It is a pity though. Unfortunatately I don't have the
> knowledge myself to fix it although I'll try my best at testing or
> giving information about what is wrong.
> I have used 3.3 succesfully for a long time, being 3.5 broken on my
> box. I have now completed the install of 3.6 and that one indeed works
> fine. The kernel seems to work pretty well and I might even thing that
> it is faster. But some operations have dramatically slowed down
> (login, sudo) I guess there are more secure routines now that use CPU
> more heavily.
> >From the scarce knowledge I have of 68k processors I even wonder that
> 68040 works and not 68030 since the first is more of a subset of the
> second (given a 68882 FPU of course). Or is some support of the
> chipsets used in the 68030 broken ?
> Do you have a 68030 yourself or have the faintest idea of what is
> broken ?

M68k 030 support itself is _not_ broken, see hp300 and mvme68k. The
hardware in the high-end models (Quadra) is really different from the
low-end (LC, Performa) and older (II series) models. And then there are
those models named Quadra but with really LC hardware inside ...

Altoghether it seem to be interrupt issues. I have a IIsi, IIcx and
Performa 450, but they're all <8MB RAM and therefore basically useless.
Not from an OpenBSD point of view but even from MacOS, because the
Booter requires Mode32 which refuses to work with less than 8MB. 

Oh well and the limit for OpenBSD is 12MB anyway :)