In the history of Enigma, the folk at Bletchley Park wanted to build a
working replica of Colossus. They thought that the cost of
manufacturing WW2-era telephone relays would be prohibitive, until they
found that BT was just converting all their exchanges to electronic
switching!
cheers,
N
On 24/07/2024 2:12 pm, Paul Koning wrote:
The original is here:https://ir.cwi.nl/pub/13534 and that shows the citation
you should use.
Done.
https://liam-on-linux.dreamwidth.org/91041.html
Here's what I wrote:
ARRA was the first ever Dutch computer.
There's an account of its creation entit
On Tue, Jul 23, 2024 at 2:20 PM Rick Bensene via cctalk <
cctalk@classiccmp.org> wrote:
> Dwight wrote:
>
> > As a kid, I used a handful of radioshack relays to make a sequenced
> electrical lock. One had to
> > enter four each four bit numbers to turn on the lock. Any wrong number
> and you had t
> On Jul 24, 2024, at 6:48 AM, Liam Proven via cctalk
> wrote:
>
> On Tue, 23 Jul 2024 at 19:18, Gavin Scott via cctalk
> wrote:
>>
>> On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
>> wrote:
>>> It's interesting that the designers of ARRA spoke about what they did, and
>>> were q
On Tue, 23 Jul 2024 at 19:18, Gavin Scott via cctalk
wrote:
>
> On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
> wrote:
> > It's interesting that the designers of ARRA spoke about what they did, and
> > were quite honest about their mistakes. Quite refreshing. Unfortunately
> > that n
On Tue, 23 Jul 2024, dwight wrote:
Konrad Zuse made several attempts but making useful electromechanical
memory was his down fall.
Huh? The Z11 was Zuse's first commercially produced machine and it was
entirely relay based. It was quite successful and reliable. And this
electromechanical memo
> On Jul 23, 2024, at 6:18 PM, ben via cctalk wrote:
>
> On 2024-07-23 1:31 p.m., Paul Koning via cctalk wrote:
>>> On Jul 23, 2024, at 2:09 PM, Gavin Scott wrote:
>>>
>>> On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
>>> wrote:
It's interesting that the designers of ARRA spok
On 2024-07-23 1:31 p.m., Paul Koning via cctalk wrote:
On Jul 23, 2024, at 2:09 PM, Gavin Scott wrote:
On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
wrote:
It's interesting that the designers of ARRA spoke about what they did, and were quite
honest about their mistakes. Quite re
Dwight wrote:
> As a kid, I used a handful of radioshack relays to make a sequenced
> electrical lock. One had to
> enter four each four bit numbers to turn on the lock. Any wrong number and
> you had to start over. I > think that was first the first time I did a
> logical design. You'd set the
> On Jul 23, 2024, at 2:09 PM, Gavin Scott wrote:
>
> On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
> wrote:
>> It's interesting that the designers of ARRA spoke about what they did, and
>> were quite honest about their mistakes. Quite refreshing. Unfortunately
>> that narrative
> On Jul 23, 2024, at 2:55 PM, ben via cctalk wrote:
>
> On 2024-07-23 12:09 p.m., Gavin Scott via cctalk wrote:
>> On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
>> wrote:
>>> It's interesting that the designers of ARRA spoke about what they did, and
>>> were quite honest about their
On 2024-07-23 12:09 p.m., Gavin Scott via cctalk wrote:
On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
wrote:
It's interesting that the designers of ARRA spoke about what they did, and were quite
honest about their mistakes. Quite refreshing. Unfortunately that narrative is in
Dutch
On Tue, Jul 23, 2024 at 7:11 AM Paul Koning via cctalk
wrote:
> It's interesting that the designers of ARRA spoke about what they did, and
> were quite honest about their mistakes. Quite refreshing. Unfortunately
> that narrative is in Dutch: "Computers ontwerpen, toen".
> https://ir.cwi.nl/
> On Jul 22, 2024, at 10:14 PM, dwight via cctalk wrote:
>
>
> Bob Rosenbloom started to make a relay computer, using pc boards, but found
> that typical dip relays talk to each other ( leaky magnetic fields ) .
> Konrad Zuse made several attempts but making useful electromechanical memory
Bob Rosenbloom started to make a relay computer, using pc boards, but found
that typical dip relays talk to each other ( leaky magnetic fields ) .
Konrad Zuse made several attempts but making useful electromechanical memory
was his down fall.
As a kid, I used a handful of radioshack relays to m
On 2024/07/22 12:16 a.m., Tom Hunter via cctalk wrote:
Recently people repeatedly mentioned relay computers.
There is a very nice 8-bit relay computer implementation by Joe Allen. The
computer looks and feels like the microprocessor trainer boards of the 70s.
The CPU is implemented in 83 relays.
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