"Al Kossow" <a...
@spies.com> wrote in message news:firstname.lastname@example.org
> > By the way, RSX-15 was released late 1970, then was ported to the 11
> > as RSX-11D (Hank Krejci).
> I've just scanned a 1971 version of the RSX-15 reference manual
> Do you happen to know where what the roots of the RSX design
> came from ? It doesn't seem to come from any DEC operating
> system from the 60's.
Thanks for scanning it in! Good to see it again.
In August, 2001, I had a get-together with Bruce Mitchell and Ralph
Ralph's summer place in Wisconsin (near the Dells). Bruce videotaped while
a mind-dump. I traced the roots of RSX back to 1959 and showed when and why
it evolved as it did. I have a copy of the three raw videotapes amd Bruce
was going to
get them edited (they are a bit amateurish, to say the least.) However,
RSX did not come from a DEC operating system, as you observed. It's
precedants were a realtime executive writen by John Neblett (now retired in
for the RW-300 process control computer. Thence to "The Synchronous
me about 1963 for the TRW-330 process control computer. Then I headed the
to write "Ops Control" for the BR-340 in 1964 (Dupont loved it).
Bunker-Ramo left the
process control business and I joined Honeywell where I managed the project
on the DDP-516 (John Haynie and Walt Duncan, chief architechs and
developers). I joined
DEC in 1969 in marketing (all marketeers were engineers at that time) and
hired Sam Reese
part time to help me write a real time executive for the PDP-15. (Paid him
$15,000). I had
known Sam at Honeywell where he dashed off a small RT exec called Samtran.
This gave me the
time to just sit back and think. The basic specifications and architecture
came primarily out of me based
My wife and I have a small website and on it you will find some old
First, an outline I prepared before the aforementioned videotape was made.
just notes by me but may contain things of interest.
Next is a very early informal writeup very early in the effort, written at
the urging of Bob McInnes.
You will see RSX taking shape.
Third is the oldest: it is a list of macros for "DEX-15" which was the
first name for RSX-15. This
list is extremely early and changed quite a bit, but you can see RSX begin
Then there is a letter of reference writen for me by Bernie LaCroute.
The first released version of RSX-15 was provided with source. On the title
page is the
statement that RSX-15 was programmed by Sam Reese, Dan Brevik, Hank Krejci
You might also like to visit Bruce's site for some anecdotes.
Click on "An RSX FAQ" When you get there look at "General", "Software