28 Jun
2020
28 Jun
'20
11:24 a.m.
From: Peter Dick
As I expect you know, RSTS was 'born' on 11th
June 1970 as shown when
you print DATE$(1%) ...
This means RSTS/E, the Greatest Operating System ever, has just turned
50 years old.
Err, I expect that that was RSTS-11 in June, 1970, not RSTS-E. Since RSTS-11
(which I learned to program on; happy memories :-) was a BASIC-PLUS only
system, and ran on a PDP-11/20, I suspect it was a fairly different operating
system (although no doubt it's BASIC-PLUS interpreter was ported to RSTS-E).
I think RSTS/E needed the -11/45, introduced around June 1972; sources
give 1973 for RSTS/E.
Noel
28 Jun
28 Jun
11:36 a.m.
On Jun 28, 2020, at 2:24 PM, Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
RSTS/E of course has a bunch of new stuff in it to deal with mapping, but the bulk of the
code carries over from RSTS-11. For example, the file system code is basically the same,
as is a large fraction of driver code as well as core kernel services.
RSTS/E did lose some oddball things, such as the fact that RSTS-11 did BASIC-PLUS string
garbage collection through a file processor overlay.
paul
From: Peter Dick
As I expect you know, RSTS was 'born' on
11th June 1970 as shown when
you print DATE$(1%) ...
This means RSTS/E, the Greatest Operating System ever, has just turned
50 years old.
Err, I expect that that was RSTS-11 in June, 1970, not RSTS-E. Since RSTS-11
(which I learned to program on; happy memories :-) was a BASIC-PLUS only
system, and ran on a PDP-11/20, I suspect it was a fairly different operating
system (although no doubt it's BASIC-PLUS interpreter was ported to RSTS-E).
I think RSTS/E needed the -11/45, introduced around June 1972; sources
give 1973 for RSTS/E.
Noel 
29 Jun
29 Jun
10:02 a.m.
On Sun, Jun 28, 2020 at 2:36 PM Paul Koning via cctalk
<cctalk at classiccmp.org> wrote:
> Err, I expect that that was RSTS-11 in June,
1970, not RSTS-E. Since RSTS-11
> (which I learned to program on; happy memories :-) was a BASIC-PLUS only
> system, and ran on a PDP-11/20, I suspect it was a fairly different operating
> system (although no doubt it's BASIC-PLUS interpreter was ported to RSTS-E).
>
> I think RSTS/E needed the -11/45, introduced around June 1972; sources
> give 1973 for RSTS/E.
I came to RSTS some time later (not counting dialling from a
DECwriter, I first really used RSTS/E in 1984) but with the difference
between RSTS-11 and RSTS/E, I went over David Ahl's "101 BASIC
Computing Games" to figure out from the code, from the run listings,
and from the descriptions, which of the many systems were used. I
found references identifying about 40% of the games, and relevant to
this thread, ANIMAL and BLKJAC mention RSTS-11, several mention RSTS/E
(ACEYDU, FIPFOP, HOCKEY, HURKLE, MUGWMP, SALVO, and SYNONM), and one
mentions the EduSystem 70 (HRMABI). In various places I've found
mention of the EduSystem 60 (single-user on a 4K PDP-11/20), the
EduSystem 70 (up to 8 users on a 16K PDP-11/20), and the EduSystem 80
(up to 16 users on a 24K PDP-11/20 and a specific mention or RSTS-11).
The EduSystem handbook (1973 publication date) only covers up to the
EduSystem 50 so I don't have configuration details of any of the
systems.
As I mention from time to time, I have an 11/20 that needs extensive
restoration work (it was rescued from the dumpster at work after my
supervisor stripped out fans and PSUs) and I'd love to find things to
run on it other than paper tape and toggle-in programs. Finding a
copy of an EduSystem distro would be fantastic for demos.
Cheers,
-ethan
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ethan.dicks＠gmail.com -
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