On Wed, 23 Oct 1996, Jeremy Cooper wrote:

> Date: Wed, 23 Oct 1996 13:29:57 -0700 (PDT)
> From: Jeremy Cooper <jeremy@broder.com>
> To: "Erik E. Fair" <fair@clock.org>
> Cc: port-sun3@NetBSD.ORG
> Subject: Re: 3/60 SCSI Problem
> 
> On Wed, 23 Oct 1996, Erik E. Fair wrote:
> 
> > At 21:46 -0700 10/22/96, naamato@merit.edu wrote:
> > 
> > >And, what's this I hear about some late 3/60 models shipped with a 68030?
> > 
> > That would be the 3/80. Since it has a different architecture than the
> > 68020 machines (had to do something with that MMU and cache!), NetBSD won't
> > run on it yet. There were rumours of someone working on it, but I haven't
> > seen anything here about it in quite some time.
> 
> Actually a 68030 will work work as a 68020.  When powered on, the MMU is
> disabled.  If the ROM startup code does not turn it on, it will remain
> disabled, appearing as a faster version of the 68020.
> 
> As for the 3x, the cache you speak of does not exist in all 3x machines,
> only in the 3/4xx models.  The 3/80 is the only member of the family
> without it.
> 
> -J
> 
> 
One can also change the chrystal on these and make it go faster. I have a
3/50 running at 30MHZ.  It is still going after about six months.
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