PDP-11 Operating Systems

allison ajp166 at verizon.net
Fri Mar 11 07:23:08 CST 2011

On 03/11/2011 06:01 AM, Wolfgang Eichberger wrote:
> Hi everyone,
> You may have noticed in the pdp11 usenet groups that over some time I
> have collected a nice bunch of PPD-11 OSes in various versions (this
> takes less space, I have to deal with some kind of space restrictions
> at the moment). From time to time I tend to put online what I have
> found (please see 5ewl.blogspot.com if you want).
> There are some well known archives out there in the internet, but some
> OSes mentioned in the PDP-11 faq and other sources are kinda hiding
> from me.
> Let's start here: As I was reading the Ersatz-11 documentation file I
> stumbled upon "Fox 2/30 OS".
> Does anyone now something about this OS? Did any copies of this system
> or documentation and software survive?  The only reference I have
> found so far since I read the Ersatz-11 docs is here:
> http://archive.computerhistory.org/resources/text/Foxboro/Foxboro.Fox...
> (can't look at this file at the moment as I am on a slooooow internet
> connection). All I found out is there's a strong focus on process
> control in this system as well at it should be some kind of OEM.
> Another OS I am currently looking for is CAPS-11. It is mentioned at
> some points, but I could find almost no documentation, definately no
> sources or tape images.
> Much of the other OSes I've got in my little list are missing the
> early versions. It would be a pleasure to see these showing up
> somewhere and making them available for the interested Enthusiasts. I
> saw discussions about licensing and property issues about some other
> OSes too (like DSM). They seem to be stucked at some point, hopefully
> these OSes don't get lost sometime.
> Here's a little sum-up about Systems I didn't came across so far:
> CAPS-11, CTS-300 and -500, DSM-11, DURESS, GAMMA-11, HT-11, MERTS,
> Micropower Pascal, MONECS, MTS, PC-11, RUST/XM, SPHERE, TRAX

HT-11 is RT11 SJ V2 with mods for drivers to match the Heath H11
Computer (mainly the floppy).  So if you have RT11 you have ht11.

A few of those I've never heard of.


> If you have any information about the Operating Systems mentioned in
> this message or can help out with disk images, disks, sources etc. I'd
> greatly appreciate if you'd drop a line.
> Have a good start into the weekend,
>   Wolfgang
> --
> Wolfgang Eichberger - OE5EWL
> Operating System Collector
> Blog: 5ewl.blogspot.com
> Homepage: www.eichberger.org

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