Hi Guys:

Not that it helps much, but I just asked one of the main developers of 
the PMAX, and here is what he has to say on the subject:

Best Regards,

Bernie Doehner

---------- Forwarded message ----------
Date: Sun, 15 Sep 1996 16:01:53 -0400
From: Armando Stettner <aps@esslink.com>
To: Bernie Doehner <bad@uhf.wdc.net>
Subject: Re: DS 5000/200: should I get one cheap? (fwd)

Hi.

I am not sure I can be of too much help here as other than the original
PMAX and the first 3MAX (r4000 based stuff), all of the rest of
this stuff was after my time. I do seem to recall that the Turbochannel
was 25MHz DMA but maybe they did cost reduced versions later on....

	armando.




Bernie Doehner wrote:
> 
> Hi Armando:
> 
> Could you shed some light on the DS 5000 /200 vs. /240 discussion below?
> 
> Thanks.
> 
> 73
> 
> Bernie nu1s
> 
> ---------- Forwarded message ----------
> Date: Sun, 15 Sep 1996 18:10:06 +1000
> From: Simon Burge <simonb@telstra.com.au>
> To: Ignatios Souvatzis <ignatios@cs.uni-bonn.de>
> Cc: jonathan@dsg.stanford.edu, port-pmax@NetBSD.ORG
> Subject: Re: DS 5000/200: should I get one cheap?
> 
> On Sat, 14 Sep 1996 21:58:45 +0200 (MET DST)  Ignatios Souvatzis wrote:
> 
> > Jonathan wrote:
> >    The 5000/200 is the first-generation Turbochannel machine. The CPU is
> >    on the basboard (unlike other TC DECstations where the CPU is a
> >    daughterboard, upgradable to an r4000 or r4400 daughterboard which is
> >    not yet supported.)
> >
> > Hm, turns out it might really be a 5000/240, its not clear yet. Any
> > gotchas with them?
> 
> Well, they have a 40MHz CPU (a bit faster), and the CPU is on a
> daughter board. This can be upgraded to a 60MHz R4400, although these
> are getting very rare and seem to be expensive.
> 
> One thing I can't remember is if the /200 had a 12.5 MHz turbochannel,
> but the /240 definitely has a 25MHz bus.  Anyone else remember what the
> /200 has?  I think most (all?) of the 5000/1xx series has a 12.5MHz
> turbochannel.
> 
> Other than that, they're pretty much the same as the /200.
> 
> >    It looks like there's a bug in the serial-console code for 5000/200s
> >    in the 1.2 release. (Either that or I have a 200 with a a dead port.)
> >    More on that later.
> >
> > ugh :-/
> 
> And there serial console is working on these now :-)
> 
> Simon.