| The ELLIOTT 503 [message #395186] |
Sun, 31 May 2020 04:52  |
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Originally posted by: simon_pengelly
I used to program the Elliott 503s at the BT computer centre in Gresham St.
The Algol programs were on 8-track paper tape via 1000 char/sec readers.
I used the Elliott simulation package for an economic model of local cable provisioning.
At one time I had a printout of a complete memory dump and was able to identify my program routines and where all the variables and constants were stored. mnemonic codes 20, 30 and 24 are still etched in my brain!
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| Re: The ELLIOTT 503 [message #395189 is a reply to message #395186] |
Sun, 31 May 2020 07:36  |
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Originally posted by: Bob Eager
On Sun, 31 May 2020 01:52:54 -0700, simon_pengelly wrote:
> I used to program the Elliott 503s at the BT computer centre in Gresham
> St.
> The Algol programs were on 8-track paper tape via 1000 char/sec readers.
> I used the Elliott simulation package for an economic model of local
> cable provisioning.
> At one time I had a printout of a complete memory dump and was able to
> identify my program routines and where all the variables and constants
> were stored. mnemonic codes 20, 30 and 24 are still etched in my brain!
Not much about the 503 directly, but you might find this interesting.
https://computerconservationsociety.org/resurrection.htm
--
Using UNIX since v6 (1975)...
Use the BIG mirror service in the UK:
http://www.mirrorservice.org
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| Re: The ELLIOTT 503 [message #395212 is a reply to message #395186] |
Mon, 01 June 2020 02:55 |
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Originally posted by: Eric vdM
On Sunday, May 31, 2020 at 10:52:55 AM UTC+2, simon_p...@hotmail.com wrote:
> I used to program the Elliott 503s at the BT computer centre in Gresham St.
> The Algol programs were on 8-track paper tape via 1000 char/sec readers.
> I used the Elliott simulation package for an economic model of local cable provisioning.
> At one time I had a printout of a complete memory dump and was able to identify my program routines and where all the variables and constants were stored. mnemonic codes 20, 30 and 24 are still etched in my brain!
Reviving a twenty year old thread. Wow.
The beauty of systems like the Elliott was that it was possible to understand all of the hardware and part of the software. And remember all 64 of its functions codes, in octal.
You may be interested in having a look at some of the manuals for the Elliott 503. They can be found at Bill Purvis's site: <http://www.billp.org/ccs/503/index.html>
Eric van der Meer
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| Re: The ELLIOTT 503 [message #395218 is a reply to message #395212] |
Mon, 01 June 2020 12:01 |
Quadibloc
Messages: 4399
Registered: June 2012
Karma: 0
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Senior Member |
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On Monday, June 1, 2020 at 12:55:48 AM UTC-6, Eric vdM wrote:
> Reviving a twenty year old thread. Wow.
I had done some searching, and found that the Elliott 503 was a British design;
there had been another computer which was a renamed RCA machine.
Just now, I noticed that the Elliott 503 has another claim to fame; it was the
computer that used Cluff-Foster-Idelson code, which was the first computer code
to have a general arrangement of characters similar to what would later be used
in ASCII (although it was definitely very different from ASCII in a number of
ways).
John Savard
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