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7th Dec 2019, 3:14 pm | #1 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Leo the Lyon!
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7th Dec 2019, 8:19 pm | #2 |
Dekatron
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,578
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Re: Leo the Lyon!
I bet all that could be built into a single laptop, possibly even a mobile phone now.....!
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There are lots of brilliant keyboard players and then there is Rick Wakeman..... |
7th Dec 2019, 8:37 pm | #3 |
Guest
Posts: n/a
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Re: Leo the Lyon!
I t has 2k of 35 bit words, call that 10k bytes and ran at 500kHz, a 50p PIC has lots more power and the same ram plus lots of ROM. Leo had the programme in RAM, now that's proper programming!
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7th Dec 2019, 10:12 pm | #4 |
Octode
Join Date: Mar 2016
Location: Knutsford, Cheshire, UK.
Posts: 1,500
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Re: Leo the Lyon!
So, who on here is going to build a replica?
Who's got a big enough house?
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...where on earth did that spring/screw go?? |
7th Dec 2019, 10:36 pm | #5 |
Heptode
Join Date: Apr 2011
Location: Gosport, Hampshire, UK.
Posts: 606
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Re: Leo the Lyon!
I borrowed a book from the library about Lyons Tea Houses and their computer system. So interesting. Way ahead of their time!
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GQRP Club 4704 - BVWS Member |
8th Dec 2019, 12:04 am | #6 |
Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,433
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Re: Leo the Lyon!
Demo software available from British Computer Society
http://sw.ccs.bcs.org/leo/
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Frank |
8th Dec 2019, 12:09 am | #7 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,901
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Re: Leo the Lyon!
I bought a few 1/2 inch tape reels from M&B in the seventies with LEO in that typefont on them, intending to machine the spacer for 1/4 tape. Should have kept them. I knew Leo was an old computer but knew nothing further at the time.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
8th Dec 2019, 12:27 am | #8 |
Heptode
Join Date: Sep 2018
Location: Twickenham, London, UK.
Posts: 539
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Re: Leo the Lyon!
What a lovely and clearly smart lady.
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Alan G6PUB, BVWS |
8th Dec 2019, 7:51 am | #9 | |
Octode
Join Date: Dec 2017
Location: Morden, Surrey, UK.
Posts: 1,561
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Re: Leo the Lyon!
Quote:
It`s excellent. |
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8th Dec 2019, 12:28 pm | #10 | |
Nonode
Join Date: Aug 2015
Location: Cambridge, Cambs. UK.
Posts: 2,198
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Re: Leo the Lyon!
Quote:
Then at university, our computer lectures were mainly about analogue differential analysers, which were far from the latest thing! Martin
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BVWS Member |
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8th Dec 2019, 2:45 pm | #11 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,901
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Re: Leo the Lyon!
And those analogue computers were an awful lot harder to learn about than the new-fangled digital stuff.
Setting up to solve a differentia equation meant starting from understanding the differential equation and what it described. Exercises on the digital machines were relatively trivial.... write a little programme to calculate 19*X-27 for X=0 to X=100 and display 6 digits with two decimal places. Easy! Too easy! these digital things just didn't have the sophistication of the analogue machines. Any fool could programme them. They'd never catch on! David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
9th Dec 2019, 8:40 am | #12 |
Heptode
Join Date: Jul 2009
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 723
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Re: Leo the Lyon!
Hi
The description of the system includes an 'Assembler' which gets all the input ready for processing - is this the origin of the name for machine code porgramming - is assembly language? Also just found a reference to C-Lines, the origin of 'C' perhaps though the generally accepted reason appears to be it was affer B! Also interesting was that the format for the processing could be decimal or sterling! But I suppose not that surprising given its prime function. Cheers James Last edited by jamesinnewcastl; 9th Dec 2019 at 9:09 am. Reason: Reference to B added |
9th Dec 2019, 1:58 pm | #13 |
Nonode
Join Date: Mar 2010
Location: Dukinfield, Cheshire, UK.
Posts: 2,038
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Re: Leo the Lyon!
A few years ago I bought a book about the development of LEO. Fascinating reading, although it seems to be missing from the bookshelf.
Another good one is ELECTRONIC BRAINS: Stories from the Dawn of the Computer Age, by Mike Halley.
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Andy G1HBE. |