PDP-11 Operating Systems

Roy J. Tellason, Sr. rtellason at verizon.net
Fri Mar 11 20:00:14 CST 2011

On Friday 11 March 2011 07:31:11 pm Dave McGuire wrote:
> On 3/11/11 6:46 PM, Brent Hilpert wrote:
> >>>>> I extracted a couple of photos from the Fox-2 doc at the
> >>>>> archive.computerhistory.org:
> >>>>> http://www3.telus.net/~bhilpert/tmp/foxboro/
> >>>>>
> >>>>> So for PDP-11 experts, could the machine in the photos be a
> >>>>> rebadged/OEM
> >>>>> PDP-11 ca. 1972 ?
> >>>>
> >>>> That looks exactly like a PDP-11/20 front panel.
> >>>
> >>> The switch and light patterns certainly do, but the silk screen around
> >>> them looks unique.
> >>>
> >>> http://www.retrotechnology.com/pdp11/front_panel.jpg
> >>
> >> Yes, a proprietary silk-screened bezel over a standard 11/20 front
> >> panel, as has been done with lots of PDP-8 and PDP-11 systems.
> >
> > I figured somebody here would recognise it more quickly than if I went
> > looking for -11 front panel photos. While many -11s were used in
> > embedded systems, I don't think I had seen one where they were actually
> > trying to hide the fact by silk-screening new front panels.
>    I have a PDP-8/e with another company's custom-silkscreened front 
> bezel; it doesn't say DEC or DIGITAL anywhere on it.  Pat Finnegan has 
> (I think) a PDP-11/35 with a similarly-custom front bezel.  I don't 
> recall if that says DEC or DIGITAL on it but I think it doesn't.
>               -Dave
OTOH,  I have a 486 ISA peecee that _does_ say "digital" on the front of it.  I didn't know they were into this stuff,  too...

Darn thing only seems to want parity RAM,  too.

Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin

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