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AOS/VS! That brings back memories. I used it in college back in
the 1980's on an MV/8000. Later at a reseller I worked for I had an
MV/4000 in-house and various other MV's that were in various stages
of being sent to customers. My last contact with AOS/VS would have
been with release 6.0.0.0 or 7.0.0.0 in late 1987. Sadly I have
forgotten a lot about it though I still have reams of code I wrote
back in the day as well as some internals tools written in macro. I
did have some fun patching the kernel to add "Load System Ring"
privilege to PID 2 as well as add an IO privilege to my profile that
PREDITOR did not offer but EXEC was more than happy to pass on to
its children.<br>
<br>
One thing that was quite advanced for its days was support of
"Tasks" which we now call "Threads". The ability to have a program
run several sections of code simultaneously was an incredible
concept though necessary in order to implement Control-C/Control-A
handlers. Cross-task synchronization and deadlocking were all
issues I learned about before they again became issues for the
"multi-threading" community.<br>
<br>
If there ever was such an emulator I would not mind trying it out.
Currently I play with the PDP11 and VAX emulators as I would up
spending much more time working with DEC equipment than DG. As
such, I have retained a lot more knowledge about RSTS/E and VMS than
I have about AOS/VS<br>
<br>
Robert<br>
<br>
<br>
On 5/11/2012 4:27 AM, Steve Merrony wrote:
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I have heard it said that most successful OS efforts begin with
with someone who 'has an itch to scratch'. My persistent itch is
a curious desire to have AOS/VS running in some form.<br>
<br>
Over the years there has been a small amount of discussion on this
forum about 32-bit DG, but it always peters out with someone
saying they are in touch with ex-DG IP holders and then "nothing
continues to happen"... Given the historical interest in the
creation of the Eagle this seems to me to be a crying shame.<br>
<br>
I have been pondering a way forward; as I see it there are two
options:<br>
<br>
1. We go ahead with an MV simulator in SimH. There is a lot of
intact hardware documentation freely available on the net so I
would have thought this is technically feasible. The problem is
software, but there are a few MVs around the world now run by
enthusiasts - maybe they could be persuaded to share privately
until an official solution is worked out?<br>
<br>
2. A non-SimH route: we re-implement AOS/VS on modern hardware!
The whole OS, not just the CLI. This is clearly a wildly
different option, and at least as much work as option 1, but I
think it could be a fascinating project in its own right.<br>
<br>
Anyone interested?<br>
<br>
<br>
<div class="moz-signature">-- <br>
<font size="-1"><i>Stephen Merrony<br>
</i></font><br>
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