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11th Jun 2022, 9:32 am | #1 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,190
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Bitsavers
I am not sure if this site :
http://www.bitsavers.org/ has been mentioned here or not. Not strictly radio-related but I hope it's on-topic. It's an american site for vintage computers, mostly larger machines (minicomputers, mainframes) but with stuff on micros too. User manuals, service manuals, circuit diagrams, etc.There's also a section for 'components' with lots of unusual databooks and one for 'test gear'. Everything is free to download too. One 'gotcha' is that it (by deliberate choice of the site's owner) uses http, rather than https. Some browsers moan about it being a security risk, but I doubt you'll get any form of malware from it, the owner is very active in vintage computing circles. I've never had any problems. |
11th Jun 2022, 10:46 am | #2 |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,484
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Re: Bitsavers
Yes, it's a great resource.
Usually, if I can't find the data sheet for some obscure IC as a standalone document I can, with some patience, find it by trawling through the manufacturer's databook on bitsavers. Whoever scans all those books deserves some kind of medal, I have often found info there which I can not find anywhere else. There are a lot of linear IC databooks on the site as well, it's not just one for the bit twiddlers. Last edited by SiriusHardware; 11th Jun 2022 at 10:57 am. |
16th Jun 2022, 6:34 pm | #3 |
Heptode
Join Date: Feb 2021
Location: Edinburgh, Scotland, UK.
Posts: 528
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Re: Bitsavers
I have this bookmarked, it had some old supercomputer manuals on it that I was interested in.
As for http[s], I don't see why anyone should be comforted just because someone added a certificate to their website, especially this style of site. |
16th Jun 2022, 7:01 pm | #4 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
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Re: Bitsavers
I too now have it bookmarked, especially as I don't have time to do it justice at present.
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Mending is better than Ending (cf Brave New World by Aldous Huxley) |
16th Jun 2022, 11:31 pm | #5 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,800
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Re: Bitsavers
And there was me thinking it would be a tincture for soldering irons!
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
20th Jun 2022, 9:10 am | #6 | |
Dekatron
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,185
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Re: Bitsavers
Quote:
Also, and that may be the reason for that particular administrator: according to information theory, any frivolous use of cryptography makes it weaker. Maybe not really a practical problem if the key is long enough and the algorithm is flawless, but it's a very principal argument and the first that I would suspect someone who's active in IT circles to make. Last edited by Maarten; 20th Jun 2022 at 9:25 am. |
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20th Jun 2022, 11:25 am | #7 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,800
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Re: Bitsavers
There is a counter-argument about cryptography on trivial data, that provided the crypto is hard enough so that it costs enough to crack a message, then the increased number of encrypted messages acts to make it difficult to decide which ones are worth cracking, though sender and recipient addresses may give clues. Choice of optimum game-plan needs to take into account a number of factors. It can all be rather non-linear with many cross-over points.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |