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#16
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What is the absolute smallest instruction set do you need to makea working computer?
On 2019-09-22 8:36 p.m., pyotr filipivich wrote:
"J. P. Gilliver (John)" on Sun, 22 Sep 2019 21:15:45 +0100 typed in alt.windows7.general the following: In message , pyotr filipivich writes: [] Martin Gardner had an article about a "theoretical" 'primitive computer using pulleys and ropes in place of transistors (or tubes). In theory it would work, in practice there would be too much imprecision from the slack/stretch in the ropes for it to work. Babbage (arguably only with modern materials) made a mechanical machine work. There are the mechanical equivalents of squaring circuits, thresholds etcetera. Electronic computers could be made to work with three or four voltage levels rather than two - it just reduces the noise margin, which puts limits on speed and distances. Presumably a pulleys/ropes machine could be made, as long as there were thresholds, and the mechanical equivalents of amplifiers (a rope-operated clutch perhaps? I'm not really a mechanical engineer). It is funny in a way. Garden was reporting a supposed "discovery" of a "computer" discovered on a south pacific island. Yes, one could probably be made to work. Wintergatan - Marble Machine has made what was originally a CGI video into a working machine. https://www.youtube.com/watch?v=IvUU8joBb1Q A fascinating study in its own right. Absolutely wonderful machine and a brilliant inventor/builder. I didn't know it existed. Rene |
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#17
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What is the absolute smallest instruction set do you need to make a working computer?
Rene Lamontagne on Sun, 22 Sep 2019 22:31:28 -0500
typed in alt.windows7.general the following: On 2019-09-22 8:36 p.m., pyotr filipivich wrote: "J. P. Gilliver (John)" on Sun, 22 Sep 2019 21:15:45 +0100 typed in alt.windows7.general the following: In message , pyotr filipivich writes: [] Martin Gardner had an article about a "theoretical" 'primitive computer using pulleys and ropes in place of transistors (or tubes). In theory it would work, in practice there would be too much imprecision from the slack/stretch in the ropes for it to work. Babbage (arguably only with modern materials) made a mechanical machine work. There are the mechanical equivalents of squaring circuits, thresholds etcetera. Electronic computers could be made to work with three or four voltage levels rather than two - it just reduces the noise margin, which puts limits on speed and distances. Presumably a pulleys/ropes machine could be made, as long as there were thresholds, and the mechanical equivalents of amplifiers (a rope-operated clutch perhaps? I'm not really a mechanical engineer). It is funny in a way. Garden was reporting a supposed "discovery" of a "computer" discovered on a south pacific island. Yes, one could probably be made to work. Wintergatan - Marble Machine has made what was originally a CGI video into a working machine. https://www.youtube.com/watch?v=IvUU8joBb1Q A fascinating study in its own right. Absolutely wonderful machine and a brilliant inventor/builder. I didn't know it existed. It is a fascinating machine, both from the design concept through to the latest build. Fascinating as well are the machinist bits (the variable speed clutch to adjust timing for the kick drum). In my boxes of book I have the 4 volume set of "Ingenious Devices" - or "How we did this before stepper motors and computer controls." -- pyotr filipivich Next month's Panel: Graft - Boon or blessing? |
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