[Info-vax] Dave Cutler, Prism, DEC, Microsoft, etc.

[John Reagan]

"Neil Rieck" <n.rieck at sympatico.ca> wrote in message 
news:f87abdc1-4084-4ba1-bee5-44b182e3a5ff at k19g2000yqc.googlegroups.com...
On Nov 14, 8:59 pm, JF Mezei <jfmezei.spam... at vaxination.ca> wrote:
> DaveG wrote:
> > We had a 9000. It was air cooled.
>
> Knowing how Digital didn't do things "simple", it could have been a
> system made up of a internal water loop to cool the electronics, a
> freon compressor with a water-freon heat exchange at one end, and a
> freon-air exchanger at the other , along with fans that drew cool
> outside air through the exchanger and exausted warm air out.
>
> So, to the end user, it looks, acts and feels like air cooled, but to
> the engineers, they still retained their water cooled electronics deep
> inside the machine.
>
> And if you're only going to build a handful of VAX 9000s, it would cost
> less to add that freon compressor than to redesign the water cooled
> electronics.
>
> There are precedents for freon compressors in Digital cabinets:
>
> http://toyvax.glendale.ca.us/~vance/vaxbar.html
>
> :-) :-) :-) :-) :-) :-) :-)
>
> Seriously though, how many VAX9000s were sold ?

Didn't Seymour Cray have a prototype which ran in an aquarium filled
with cleaning fluid? Not sure if his production machine was built that
way.


I saw a Cray-2 at Cray headquaters once that reminded me of a large cube 
(about 4ft high, 5ftx5ft if I remember correctly).  It had a glass top so 
you can see the Fluorinert inside.  The production Cray-2s looked different 
than the one I saw.

John