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What if humanity forgot how to make CPUs?

vardump 1y ago
We're toast should we ever lose ability to make CPUs. Perhaps there should be more research how to make small runs of chips cheaply and with simple inputs. That'd also be useful if we manage to colonize other planets.
- spencerflem 1y ago
  We as in civilization? We made it at least a few thousand years without it. Or do you mean the circumstances that would lead to this (nuclear war perhaps) would make us toast
  - vardump 1y ago
    The civilization as it is.
    - spencerflem 1y ago
      I mean, the chips they're talking abt didn't exist until like 40 years ago I think we could manage. But tbh I don't see it as at all likely short of something like nuclear war that would be the much bigger problem.
      - vardump 1y ago
        Do we really still have the society wide institutional knowledge to do things how they were done 50 years ago? I wouldn't be so sure.
        spencerflem 1y ago
        I don't think this is likely, but say we, the whole world, goes back to using telephones and writing paperwork on paper. I don't think it'd be the end of life as we know it.
        alabastervlog 1y ago
        The important chips aren’t the ones on our desks and in our hands. I think all that shit’s of dubious value to begin with. It’s the ones in factories, power systems, and transportation equipment, among other things.
        squigz 1y ago
        Mate, 50 years wasn't that long ago. We had computers and everything else we have now. We still did a lot of things fundamentally the same way. Everything was just slower and smaller (in scale; not physically) I think you also should realize much of the world continues on without bleeding-edge technology - homes are still built, crops are still harvested, and the world goes on.
      - conductr 1y ago
        It would be chaos at first, but if it's at all physically survivable our species likely will, then we're only a few years away from a "humans exist, but most their knowledge has been lost". Only a few more years later before no human alive has ever interacted with a CPU using device, then the whole notion of a CPU kind of disappears before too long. We've had this happen before of course. There's a ton of things ancient civilizations were doing that we are clueless about. So clueless, that one of the leading theories is that they must have been aided by aliens.
        anthk 1y ago
        Clueless? Bullshit and Amerigo-centrist crap from the far right. Non White -WASP- people were doing trigonometry far earlier than the Germanic ones, which were living in huts. Just have a look at Greece and Rome. Also, the Chinese knew basic Algebra too.
        conductr 1y ago
        Perhaps you need to re-read my comment. I'm saying they were exceptionally knowledgeable about things in general (STEM stuff). And, I'm saying WE are clueless as to how they knew a lot of things, they probably knew a lot more than we have clues to know about - thus, clueless I'm talking about people all over the globe, separated by time, I don't know what your deal is with acting like I'm a white person poo'ing on POC - or how any of the racial/nationality/etc stuff you wrote factors in at all. You're obviously easily triggered and/or need to work on reading comprehension
        anthk 1y ago
        Bear in mind the wacko alien thesis it's being held from envious right wing nuts as if the Egyptians were dumb or something. They are butthurted about Mediterranian non-Wasp origins of civilization, because their Aryan discourse crumbles down. It always was a matter of commerce and knowledge sharing between distinct races and tribes.
  - AlienRobot 1y ago
    I'm not sure we can actually support 8 billion people's food production and distribution logistics without CPU's anymore.
    - spencerflem 1y ago
      Whatever makes us forget CPUs will make there be less than 8 billion people I'm sure.
      - cranky908canuck 1y ago
        Yep. The hard way.
    - squigz 1y ago
      No, but that's hardly the same as suggesting humanity would die off. We'd adapt, just at a much smaller scale.
    - Tabular-Iceberg 1y ago
      You don’t think we could do it with human computers? As long as the algorithmic complexity of food logistics is O(n) or better with respect to population size, I guess.
  - throw0101d 1y ago
    > We as in civilization? We made it at least a few thousand years without it. Civilization is a continuity of discrete points of time. We were able to enter (so-called) Dark Ages where things were forgotten (e.g., concrete) and still continue because things were often not very 'advanced': with the decline of Rome there were other stories of knowledge, and with the Black Death society hasn't much beyond blacksmithing and so was able keep those basic skills. But we're beyond that. First off, modern society is highly dependent on low-cost energy, and this was kicked off by the Industrial Revolution and easy accessible coal. Coal is much depleted (often needing deeper mines). Then next phase was with oil, and many of the easy deposits have been used up (it used to bubble up to the ground in the US). So depending on how bad any collapse is, getting things up without easily accessible fossil fuels may be more of challenge.
    - anthk 1y ago
      >hasn't much beyond blacksmithing and so was able keep those basic skills. That's an Anglo-Saxon black legend. How do you think boats and trebuchets were made? Navigation in the ocean without trig? Astrolabes? Yeah, sure. Year 600 wasn't the same as 1200. Read about Alphonse X. https://en.m.wikipedia.org/wiki/Alfonso_X_of_Castile https://en.m.wikipedia.org/wiki/Alfonso_X_of_Castile
  - NoMoreNicksLeft 1y ago
    >We made it at least a few thousand years without it. We did that during a period of peculiar circumstances that won't ever be replicated. Relatively large, distributed population with many different ecological environments that we were already pre-adapted to. A far smaller single-point-failure population that can't just go out and hunt for its food among the vast wildlife might have it pretty rough if industrial civilization were to falter.
  - digitalsushi 1y ago
    i just learned about the Haber process. This guy, Fritz Haber, realized we could suck nitrogen out of the literal air and make soil fertilizer with it. The population is like 4 times higher than it would be without it. Scary how high up this tightrope is.
- Legend2440 1y ago
  Be more concerned about whatever nuclear war or social breakdown led to that point. Massive industrial manufacturing systems don’t shut down for nothing.
  - vardump 1y ago
    It could also happen as natural decay over centuries. There's no guarantee we'll get more advanced over time.
    - spencerflem 1y ago
      That would be a pity, but I don't see why we'd be toast.
  - kimixa 1y ago
    To have zero effort in attempting to reproduce even 70s-era silicon technology for 30 years implies some real bad stuff, if the entire chain has been knocked out to that level I doubt "silicon chip fabrication" would really be a worry for anyone during that time.
- kimixa 1y ago
  Eh, there's plenty of small fabs globally that do smaller run "nowhere near cutting edge" (180nm or so) runs - you can make a pretty decent processor on that sort of tech. Would be a pretty solid intermediate step to bootstrap automation and expansion in the cases where the supply of the "best" fabs is removed (like in a disaster, or the framework to support that level of manufacturing isn't available, such as your colony example)
  - anthk 1y ago
    Forth Deck and CPUs with TTL's from magic-1.org.
- LargoLasskhyfv 1y ago
  https://www.minimalfab.com/en/ https://www.minimalfab.com/en/
spencerflem 1y ago
This doesn't make a ton of sense to me. What situation would everyone lose the ability to make any CPU, worldwide, and we don't have a much much bigger problem then how to run AWS?
- Animats 1y ago
  A war in Taiwan?
  - spencerflem 1y ago
    Chips are made elsewhere too. At worst, we (civilization) would lose the cutting edge if that happened. It would be a sad thing but not as sad as everything else that would happen in a war.
    - PlunderBunny 1y ago
      We would go back to brick phones, with gears stuck on the side. Awesome!
  - bgnn 1y ago
    Well, we stil have enough know-how outside Taiwan on everything to produce any semiconductors. A bigger world war is most likely what it takes to bring the supply chain to a halt. Even then, nobody magically forgets these things.
    - NoMoreNicksLeft 1y ago
      Not magically, they forget naturally. No one human knows the whole sequence, from start to finish, no one can really write it down (or shoot a how-to video). Distributed, institutional knowledge is extraordinarily brittle.
      - bgnn 1y ago
        I agree, forgetting happens naturally. For example, it would be pretty difficult to produce vacuum tubes now. But I doubt this is applicable for CMOS technologies. Most of the steps down to finfets (TSMC 16nm) are rather well known. Yes we don't know the exact recipe of TSMC, Samsung or Intel, but it's not like alien technology. I read technical papers from all these fabs regularly and it's more open than what would people expect. Of course they keep their secrets too, for the cutting edge. There's so much knowhow out there that it's quite probable we can get there again in a short time if TSMC vanished fron earth all of a sudden.
myth_drannon 1y ago
We would go back to 6502, it will be fine. Just more time spent optimizing the code.
- Suppafly 1y ago
  The stuff people write for old consoles and computers is pretty amazing. Computers definitely evolved faster than they needed to for the general public. All of these industries were built around taking advantage of Moore's Law instead of being about getting them most bang from existing limitations.
- to11mtm 1y ago
  A 6502 can easily power a robot to bend metal and other objects. You can bootstrap everything else from there.
  - trollbridge 1y ago
    So can a machine built entirely from discrete components. A VAX 11/780 had no microprocessor at all. Just a CPU built out of components.
    - nxobject 1y ago
      Not quite - the VAX-11/780 relied on what was essentially a LSI PDP-11/03 as a general purpose glue processor (the “console interface board”) for the CPU initialization sequence, console and floppy I/O, and other assorted tasks.
  - vardump 1y ago
    We could call it Bender.
datadrivenangel 1y ago
It would be a bad decade, but someone would figure out how to get older microcontroller class chip production going pretty fast because $$$
PaulKeeble 1y ago
There is a bit of an issue that almost all the know how exists within a couple of private companies and if the industry down turned, such as from a crash in an AI bubble causing a many year lull, giant companies could fail and take that knowledge and scale with them. Some other business would presumably buy the facilities and hire the people but maybe not. It's one of the issues of so much of science and engineering happening privately we can't replicate the results easily.
- bsder 1y ago
  This isn't unique to semiconductors. If you turn off any manufacturing line, your company forgets really quickly how to make what that line made. GE discovered this when they tried to restart a water heater line in Appliance Park.
  - to11mtm 1y ago
    Heck, the US had this problem when they needed to renew/refurbish nuclear weapons due to more or less 'forgetting' how to make Fogbank.
    - AlotOfReading 1y ago
      FOGBANK was a little more complicated. The process that was written down just didn't work as expected. That was partially lost institutional knowledge that had never been recorded, but the original manufacturing just didn't understand their process. The process had contaminants improving the final product that they were unaware of. When the process was restarted, that didn't happen until it was investigated.
  - silisili 1y ago
    Yup. Remington apparently has no idea what the blueing formula was they used in their original 1911s. Colt lost the ability to handfit revolvers.
  - bitwize 1y ago
    We as a global civilization are close to forgetting how to make CRTs. There's like one company that still makes them, but only for military or major industrial applications (fighter jet HUDs and the like), at call-for-pricing prices. The major manufacturers, like Sony etc. all shut down their production lines, never to be restarted again because the knowledge of how to make them dissipated with those production lines. If you're an enthusiast who wants to experience retro video games as they appeared back in the day, your only option is to scavenge an old TV from somewhere.
xpl 1y ago
https://threadreaderapp.com/thread/1922015999118680495.html https://threadreaderapp.com/thread/1922015999118680495.html
daft_pink 1y ago
thankfully the way capitalism works, we would quickly reinvent them and remake them and the companies that did so would make a decent profit. generally the true problems in life aren’t forgetting how to manufacture products that are the key to human life.
charcircuit 1y ago
Even if humanity forgot, most of the process is automated, so it shouldn't be too hard to figure out how to keep an factory running.
- M95D 1y ago
  It would be extremely difficult to keep the factory from destroying itself. I work in a medical lab. The company bought a new automated coagulation analyzer. The old machine was shut down (proper shut down procedure) and kept in storage in case it was needed. They should have replaced the wash fluid with water. This procedure isn't documented because nobody expects that kind of machine to just sit unused for a long time. After a few months we needed to start it again (can't remeber why, I think there was a delivery problem with the reagents for the new analyzer). We couldn't. The washing fluid dried and detergents and other chemicals it contained solidified inside the valves, just like it happens with an inkjet printer if left unused. They were all stuck. Repair would have been too expensive and it was scrapped. I saw this happen with a haematology analyzer too. It was kept as a backup but wasn't need for a few months. I was able to resurrect that one after several hours of repeated washing. An electrolyte analyzer is even worse. Keep it turned off for only a few hours and the electrodes will need to be replaced. I don't think any other advanced industrial machine is any different. They can't be just left unused for a while and then expect them to work. It's even more problematic if the shut down procedure isn't done right (exceeding the documented requirements) or not at all.
  - Tabular-Iceberg 1y ago
    That’s what killed my suspension of disbelief watching Idiocracy. Most of the automation would have broken down in less than a day.
johnea 1y ago
Wouldn't it be better if the world totally forgot the twitverse?
waynesonfire 1y ago
We would have to git-revert linux 486 support.
roxolotl 1y ago
So taking this as the thought experiment it is what I’m struck by is that seemingly most things will completely deteriorate in the first 10-15 years. Is that accurate? Would switches mostly fail by the 10 year mark if not replaced? I’ve been looking at buying a switch for my house should I expect it to not last more than 10 years? I have a 10 year old tv should I expect it starts to fail soon?
- __d 1y ago
  My experience with retro computers is that things start to fail from around the 10-15 year mark, yes. Some things are still good after 30 years, maybe more, but .. capacitors leak, resistors go out of spec, etc, and that means voltages drift, and soon enough you burn something out. You can replace known likely culprits preemptively, assuming you can get parts. But dendritic growths aren’t yet a problem for most old stuff because the feature sizes are still large enough. No one really knows what the lifetime of modern 5/4/3nm chips is going to be.
- protocolture 1y ago
  Theres a hardware law that hardware past its half life often lives for an excessively long time. Really depends on brand and purpose but consumer hardware switches do die pretty frequently. But if you bought something like a C2960 fanless switch I would expect it to outlive me.
- floating-io 1y ago
  I have a 10+ year old Cisco 2960G and a pair of 10+ year old Dell R620's in my homelab, still humming happily along. So, no.
trollbridge 1y ago
I’m a little puzzled how “forgot how to make CPUs” also included “forgot how to make the mechanical part of hard drives, how to make flash memory, and how to make other chips”. I guess I don’t think of a 74xx series chip as a “CPU”?
- geor9e 1y ago
  I read it as: we have millions of hard drives and flash drives with a dead controller chip, so we harvest their other parts as spares. We still know how to make the spare parts from scratch, but we have so many for free.
palmotea 1y ago
This has a ton of holes: > Z-Day + 15Yrs > The “Internet” no longer exists as a single fabric. The privileged fall back to private peering or Sat links. If you can't make CPUs and you can't keep the internet up, where are you going to get the equipment for enough "private peering or Sat links" for the privileged? > Z-Day + 30Yrs > Long-term storage has shifted completely to optical media. Only vintage compute survives at the consumer level. You need CPUs to build optical media drives! If you can't build CPUs you're not using optical media in 30 years. > The large node sizes of old hardware make them extremely resistant to electromigration, Motorola 68000s have modeled gate wear beyond 10k years! Gameboys, Macintosh SEs, Commodore 64s resist the no new silicon future the best. Some quick Googling shows the first IC was created in 1960 and the 68000 was released in 1979. That's 19 years. The first transistor was created in 1947, that's a 32 year span to the 68k. If people have the capacity and need to jump through hoops to keep old computers running to maintain a semblance of current-day technology, they're definitely f-ing going to have been able to repeat all the R&D to build a 68k CPU in 30 years (and that's assuming you've destroy all the literature and mind-wiped everyone with any knowledge of semiconductor manufacturing).
- 3eb7988a1663 1y ago
  Surely knowing something is possible would speed up the process. Transistors had to go from this neat lab idea to find more and more incremental use cases. Eventually snowballing into modern chips. If you know from the beginning that computers are a neat idea, surely that would warrant more focused R&D.
- lauriewired 1y ago
  > If you can't make CPUs and you can't keep the internet up, where are you going to get the equipment for enough "private peering or Sat links" for the privileged? Storage. You only need a few hundred working systems to keep a backbone alive. Electron migration doesn’t kill transistors if they are off and in a closet. > You need CPUs to build optical media drives! If you can't build CPUs you're not using optical media in 30 years. You don’t need to make new drives; there are already millions of DVD/Bluray devices available. The small microcontrollers on optical drives are on wide node sizes, which also make them more resilient to degradation. > they're definitely f-ing going to have been able to repeat all the R&D to build a 68k CPU in 30 years (and that's assuming you've destroy all the literature and mind-wiped everyone with any knowledge of semiconductor manufacturing). If you read the post, the scenario clearly states “no further silicon designs ever get manufactured”. It’s a thought experiment, nothing more.
0xTJ 1y ago
A fun read, but I do find it a bit odd that in 30 years the author doesn't think that we would have reverse-engineered making CPUs, or at least gotten as far as the mid-70s in terms of CPU production capabilities. Also, the 10k years lifespan for MC68000 processors seems suspect. As far as I can see, the 10,000 figure is a general statement on the modelled failure of ICs from the 60s and 70s, not in particular for the MC68000 (which is at the tail end of that period). There are also plenty of ICs (some MOS (the company, not the transistor structure) chips come to mind) with known-poor lifespans (though that doesn't reflect on the MC68000).
- therealpygon 1y ago
  Agreed. It is a whole lot easier to recreate something you know is possible than to create something you don’t know is possible.
FrankWilhoit 1y ago
The larger point is that we are going to forget a lot of things.
CuriousRose 1y ago
If humans forgot how to make new CPUs, it might finally be the incentive we need to make more efficient software. No more relying on faster chips to bail out lazy coding and make apps run lean. Picture programmers sweating over every byte like it's 1980 again.
- burnt-resistor 1y ago
  Probably not. Devices would run out within a generation. It ain't ever going to happen because people can write these things called books. And computer organization and architecture books already exist and there are many 10k's copies of them. What should be captured in modern computer organization books is applied science aspects of the history until now and the tricks that made Apple's ARM series so excellent. The other thing is TSMC needs to document fab process engineering. Without the capture of niche, essential knowledge they become strategic single points of failure. Leadership and logic dictate not allowing this kind of vulnerability to fester too deeply or too long.
  - saulpw 1y ago
    The essential tacit knowledge can't be captured in books. It has to be learned by experience, participating in (and/or developing) a functioning organization that's creating the technology.
- djmips 1y ago
  That's already happening
- immibis 1y ago
  Programmers haven't been able to rely on CPUs getting faster for the last decade. Speeds used to double every 1.5 years or so. Now they increase 50% per core and double the number of cores... every 10 years. GPU performance has increased at a faster pace, but ultimately also stagnated, except for the addition of tensor cores.
- geysersam 1y ago
  Ah the good old days again, what a beautiful vision. Decadence and lazyness begone! Good luck running your bloated CI pipelines and test suits on megahertz hardware! /s
asciimov 1y ago
> … no further silicon designs ever get manufactured The problem wouldn’t be missing CPUs but infrastructure. Power would be the big one, generators, substations, those sorts of things. Then manufacturing, lot of chips go there. Then there is all of healthcare. Lots of important chips everywhere that aren’t CPUs.
- M95D 1y ago
  We had power for a very long time before silicon. Generators are just big coils of copper. Substations too. Solar won't work without silicon, but anything with a spinning coil of copper would. Voltmeters would need replacing with the old analog versions and humans would need to manually push switches to keep power levels constant, just like in the '50s.
  - nuc1e0n 1y ago
    And a spring together with an electro-magnet can be made into a relay. They're big and slow of course, but they do the same thing as a transistor. If you can make metal into a wire you can make them. In the 1940s computers were electro-mechanical.
mahirsaid 1y ago
There will be a great tragedy to be had if that was ever a reality in the near future. The bigger questions is what if you forgot hot to make the machines that make the CPU's. That is the bigger challenge to overcome in this crisis. Only one company specializes in this field that gives big company's like TSMC Their abilities to manufacture great CPU's. The trick is to create the machine that makes them and go from there. 10nm - 2nm capabilities.
- LargoLasskhyfv 1y ago
  There is more to lithography than ASML catering to TSMC, Samsung, Intel. There could be https://global.canon/en/technology/nil-2023.html https://global.canon/en/technology/nil-2023.html & https://spectrum.ieee.org/nanoimprint-lithography https://spectrum.ieee.org/nanoimprint-lithography There also is https://www.searchforthenext.com https://www.searchforthenext.com & https://semefab.com/ https://semefab.com/ claiming to not need that ASML high-end stuff at all, to be competitive. As reported around 2019 amongst many others like here: https://eepower.com/new-industry-products/search-for-the-next-ltd-and-semefab-introduce-a-new-transistor-wafer-process-technology https://eepower.com/new-industry-products/search-for-the-nex... Maybe it's vaporware, because I'm unaware of anything 'big' produced there. Maybe it's only lack of funding,lack of trust because non-standard and 'unproven', inertia? Who knows? And finally the forgotten minimal.fab by Yokogawa https://www.yokogawa.com/industries/semiconductor/minimal-fab/ https://www.yokogawa.com/industries/semiconductor/minimal-fa... https://www.minimalfab.com/en/ https://www.minimalfab.com/en/ with no outrageous claims about structure size equivalence, but way faster turn-around times for prototyping, and none of the usually necessary investment in all that clean-room tech. And not to forget the push and incentive China got as 'development help' to be independent :-) I'm sure they're up to many interesting things in the near future.
- RetroTechie 1y ago
  In case more advanced nodes would disappear, even a semiconductor factory capable of producing eg. 200..500nm structures would already be very useful. Remember the first 32-bit cpus were manufactured on >1um processes. Never mind 8-bitters or KB-sized memory chips. Also note that IC designs, assembly programming & more, can be (and has been) done by hand. Having any kind of compute, no matter how slow by today's standards (couple MHz) helps a lot. Same for basic applications like text processing, spreadsheets, small databases, software development, etc etc.
cadamsdotcom 1y ago
It’s a bit like trying to censor a LLM: to delete such an interconnected piece of information as “everything about making CPUs” you have to so significantly alter the LLM that you lobotomize it. CPUs exist at the center of such a deeply connected mesh of so many other technologies, that the knowledge could be recreated (if needed) from looking at the surrounding tech. All the compiled code out there as sequences of instructions; all the documentation of what instructions do, of pipelining, all the lithography guides and die shots on rando blogs.. info in books still sitting on shelves in public libraries.. I mean come on. Each to their own!
Vilian 1y ago
Hopeful they forget about JavaScript too, that would be a good thing to forget
andsoitis 1y ago
what do you have to believe to be true in order for humanity to forget how to make CPUs?
mikewarot 1y ago
We'd still be able to make relays, and that's enough to do computing. If not that, then mechanical computer systems could be constructed to process data. There's enough information on machine tools and the working of iron to make all the tooling and machinery required to start an assembly line somewhere. After all, there was an assembly workshop turning out the Antikythera mechanism, there was a user guide on it. Obviously it wasn't the only one produced at the time.
- delian66 1y ago
  > Obviously it wasn't the only one produced at the time. It is not obvious at all to me. Where are the others like it found?
Corey_ 1y ago
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Corey_ 1y ago
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13_9_7_7_5_18 1y ago
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0x000xca0xfe 1y ago
Honestly, probably not much would happen. My daily driver laptop is a 2012 Thinkpad I literally pulled out of a scrap heap at my local university but it refuses to die. Moore's law has slowed enough that old hardware is slow but still perfectly capable to run 99% of existing software. Already existing machines would give us at least one or two decades to restart manufacturing from zero and that is more than enough time to avoid existential problems. And most computers are under-utilized. The average gaming PC is powerful enough to run the infrastructure for a bunch of small companies if put to work as a server.
nxobject 1y ago
The author’s a little bit too optimistic about the longevity of old consumer market computers: having collected vintage compact Macs, you become keenly aware of all of the possible points of failure like CRT displays, storage devices, and even fragile plastics. We may have to go back to much more analog forms of I/O: typewriter teletype with decreasing levels of logic integration, random access DECtape-style magnetic tape, etc.
hglover945 1y ago
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We're toast should we ever lose ability to make CPUs. Perhaps there should be more research how to make small runs of chips cheaply and with simple inputs. That'd also be useful if we manage to colonize other planets.

spencerflem 1y ago
We as in civilization? We made it at least a few thousand years without it. Or do you mean the circumstances that would lead to this (nuclear war perhaps) would make us toast
- vardump 1y ago
  The civilization as it is.
  - spencerflem 1y ago
    I mean, the chips they're talking abt didn't exist until like 40 years ago I think we could manage. But tbh I don't see it as at all likely short of something like nuclear war that would be the much bigger problem.
    - vardump 1y ago
      Do we really still have the society wide institutional knowledge to do things how they were done 50 years ago? I wouldn't be so sure.
      - spencerflem 1y ago
        I don't think this is likely, but say we, the whole world, goes back to using telephones and writing paperwork on paper. I don't think it'd be the end of life as we know it.
        alabastervlog 1y ago
        The important chips aren’t the ones on our desks and in our hands. I think all that shit’s of dubious value to begin with. It’s the ones in factories, power systems, and transportation equipment, among other things.
      - squigz 1y ago
        Mate, 50 years wasn't that long ago. We had computers and everything else we have now. We still did a lot of things fundamentally the same way. Everything was just slower and smaller (in scale; not physically) I think you also should realize much of the world continues on without bleeding-edge technology - homes are still built, crops are still harvested, and the world goes on.
    - conductr 1y ago
      It would be chaos at first, but if it's at all physically survivable our species likely will, then we're only a few years away from a "humans exist, but most their knowledge has been lost". Only a few more years later before no human alive has ever interacted with a CPU using device, then the whole notion of a CPU kind of disappears before too long. We've had this happen before of course. There's a ton of things ancient civilizations were doing that we are clueless about. So clueless, that one of the leading theories is that they must have been aided by aliens.
      - anthk 1y ago
        Clueless? Bullshit and Amerigo-centrist crap from the far right. Non White -WASP- people were doing trigonometry far earlier than the Germanic ones, which were living in huts. Just have a look at Greece and Rome. Also, the Chinese knew basic Algebra too.
        conductr 1y ago
        Perhaps you need to re-read my comment. I'm saying they were exceptionally knowledgeable about things in general (STEM stuff). And, I'm saying WE are clueless as to how they knew a lot of things, they probably knew a lot more than we have clues to know about - thus, clueless I'm talking about people all over the globe, separated by time, I don't know what your deal is with acting like I'm a white person poo'ing on POC - or how any of the racial/nationality/etc stuff you wrote factors in at all. You're obviously easily triggered and/or need to work on reading comprehension
        anthk 1y ago
        Bear in mind the wacko alien thesis it's being held from envious right wing nuts as if the Egyptians were dumb or something. They are butthurted about Mediterranian non-Wasp origins of civilization, because their Aryan discourse crumbles down. It always was a matter of commerce and knowledge sharing between distinct races and tribes.
- AlienRobot 1y ago
  I'm not sure we can actually support 8 billion people's food production and distribution logistics without CPU's anymore.
  - spencerflem 1y ago
    Whatever makes us forget CPUs will make there be less than 8 billion people I'm sure.
    - cranky908canuck 1y ago
      Yep. The hard way.
  - squigz 1y ago
    No, but that's hardly the same as suggesting humanity would die off. We'd adapt, just at a much smaller scale.
  - Tabular-Iceberg 1y ago
    You don’t think we could do it with human computers? As long as the algorithmic complexity of food logistics is O(n) or better with respect to population size, I guess.
- throw0101d 1y ago
  > We as in civilization? We made it at least a few thousand years without it. Civilization is a continuity of discrete points of time. We were able to enter (so-called) Dark Ages where things were forgotten (e.g., concrete) and still continue because things were often not very 'advanced': with the decline of Rome there were other stories of knowledge, and with the Black Death society hasn't much beyond blacksmithing and so was able keep those basic skills. But we're beyond that. First off, modern society is highly dependent on low-cost energy, and this was kicked off by the Industrial Revolution and easy accessible coal. Coal is much depleted (often needing deeper mines). Then next phase was with oil, and many of the easy deposits have been used up (it used to bubble up to the ground in the US). So depending on how bad any collapse is, getting things up without easily accessible fossil fuels may be more of challenge.
  - anthk 1y ago
    >hasn't much beyond blacksmithing and so was able keep those basic skills. That's an Anglo-Saxon black legend. How do you think boats and trebuchets were made? Navigation in the ocean without trig? Astrolabes? Yeah, sure. Year 600 wasn't the same as 1200. Read about Alphonse X. https://en.m.wikipedia.org/wiki/Alfonso_X_of_Castile https://en.m.wikipedia.org/wiki/Alfonso_X_of_Castile
- NoMoreNicksLeft 1y ago
  >We made it at least a few thousand years without it. We did that during a period of peculiar circumstances that won't ever be replicated. Relatively large, distributed population with many different ecological environments that we were already pre-adapted to. A far smaller single-point-failure population that can't just go out and hunt for its food among the vast wildlife might have it pretty rough if industrial civilization were to falter.
- digitalsushi 1y ago
  i just learned about the Haber process. This guy, Fritz Haber, realized we could suck nitrogen out of the literal air and make soil fertilizer with it. The population is like 4 times higher than it would be without it. Scary how high up this tightrope is.
Legend2440 1y ago
Be more concerned about whatever nuclear war or social breakdown led to that point. Massive industrial manufacturing systems don’t shut down for nothing.
- vardump 1y ago
  It could also happen as natural decay over centuries. There's no guarantee we'll get more advanced over time.
  - spencerflem 1y ago
    That would be a pity, but I don't see why we'd be toast.
- kimixa 1y ago
  To have zero effort in attempting to reproduce even 70s-era silicon technology for 30 years implies some real bad stuff, if the entire chain has been knocked out to that level I doubt "silicon chip fabrication" would really be a worry for anyone during that time.
kimixa 1y ago
Eh, there's plenty of small fabs globally that do smaller run "nowhere near cutting edge" (180nm or so) runs - you can make a pretty decent processor on that sort of tech. Would be a pretty solid intermediate step to bootstrap automation and expansion in the cases where the supply of the "best" fabs is removed (like in a disaster, or the framework to support that level of manufacturing isn't available, such as your colony example)
- anthk 1y ago
  Forth Deck and CPUs with TTL's from magic-1.org.
LargoLasskhyfv 1y ago
https://www.minimalfab.com/en/ https://www.minimalfab.com/en/

spencerflem 1y ago

This doesn't make a ton of sense to me. What situation would everyone lose the ability to make any CPU, worldwide, and we don't have a much much bigger problem then how to run AWS?

Animats 1y ago
A war in Taiwan?
- spencerflem 1y ago
  Chips are made elsewhere too. At worst, we (civilization) would lose the cutting edge if that happened. It would be a sad thing but not as sad as everything else that would happen in a war.
  - PlunderBunny 1y ago
    We would go back to brick phones, with gears stuck on the side. Awesome!
- bgnn 1y ago
  Well, we stil have enough know-how outside Taiwan on everything to produce any semiconductors. A bigger world war is most likely what it takes to bring the supply chain to a halt. Even then, nobody magically forgets these things.
  - NoMoreNicksLeft 1y ago
    Not magically, they forget naturally. No one human knows the whole sequence, from start to finish, no one can really write it down (or shoot a how-to video). Distributed, institutional knowledge is extraordinarily brittle.
    - bgnn 1y ago
      I agree, forgetting happens naturally. For example, it would be pretty difficult to produce vacuum tubes now. But I doubt this is applicable for CMOS technologies. Most of the steps down to finfets (TSMC 16nm) are rather well known. Yes we don't know the exact recipe of TSMC, Samsung or Intel, but it's not like alien technology. I read technical papers from all these fabs regularly and it's more open than what would people expect. Of course they keep their secrets too, for the cutting edge. There's so much knowhow out there that it's quite probable we can get there again in a short time if TSMC vanished fron earth all of a sudden.

myth_drannon 1y ago

We would go back to 6502, it will be fine. Just more time spent optimizing the code.

Suppafly 1y ago
The stuff people write for old consoles and computers is pretty amazing. Computers definitely evolved faster than they needed to for the general public. All of these industries were built around taking advantage of Moore's Law instead of being about getting them most bang from existing limitations.
to11mtm 1y ago
A 6502 can easily power a robot to bend metal and other objects. You can bootstrap everything else from there.
- trollbridge 1y ago
  So can a machine built entirely from discrete components. A VAX 11/780 had no microprocessor at all. Just a CPU built out of components.
  - nxobject 1y ago
    Not quite - the VAX-11/780 relied on what was essentially a LSI PDP-11/03 as a general purpose glue processor (the “console interface board”) for the CPU initialization sequence, console and floppy I/O, and other assorted tasks.
- vardump 1y ago
  We could call it Bender.

datadrivenangel 1y ago

It would be a bad decade, but someone would figure out how to get older microcontroller class chip production going pretty fast because $$$

PaulKeeble 1y ago

There is a bit of an issue that almost all the know how exists within a couple of private companies and if the industry down turned, such as from a crash in an AI bubble causing a many year lull, giant companies could fail and take that knowledge and scale with them. Some other business would presumably buy the facilities and hire the people but maybe not. It's one of the issues of so much of science and engineering happening privately we can't replicate the results easily.

bsder 1y ago
This isn't unique to semiconductors. If you turn off any manufacturing line, your company forgets really quickly how to make what that line made. GE discovered this when they tried to restart a water heater line in Appliance Park.
- to11mtm 1y ago
  Heck, the US had this problem when they needed to renew/refurbish nuclear weapons due to more or less 'forgetting' how to make Fogbank.
  - AlotOfReading 1y ago
    FOGBANK was a little more complicated. The process that was written down just didn't work as expected. That was partially lost institutional knowledge that had never been recorded, but the original manufacturing just didn't understand their process. The process had contaminants improving the final product that they were unaware of. When the process was restarted, that didn't happen until it was investigated.
- silisili 1y ago
  Yup. Remington apparently has no idea what the blueing formula was they used in their original 1911s. Colt lost the ability to handfit revolvers.
- bitwize 1y ago
  We as a global civilization are close to forgetting how to make CRTs. There's like one company that still makes them, but only for military or major industrial applications (fighter jet HUDs and the like), at call-for-pricing prices. The major manufacturers, like Sony etc. all shut down their production lines, never to be restarted again because the knowledge of how to make them dissipated with those production lines. If you're an enthusiast who wants to experience retro video games as they appeared back in the day, your only option is to scavenge an old TV from somewhere.

xpl 1y ago

https://threadreaderapp.com/thread/1922015999118680495.html https://threadreaderapp.com/thread/1922015999118680495.html

daft_pink 1y ago

thankfully the way capitalism works, we would quickly reinvent them and remake them and the companies that did so would make a decent profit. generally the true problems in life aren’t forgetting how to manufacture products that are the key to human life.

charcircuit 1y ago

Even if humanity forgot, most of the process is automated, so it shouldn't be too hard to figure out how to keep an factory running.

M95D 1y ago
It would be extremely difficult to keep the factory from destroying itself. I work in a medical lab. The company bought a new automated coagulation analyzer. The old machine was shut down (proper shut down procedure) and kept in storage in case it was needed. They should have replaced the wash fluid with water. This procedure isn't documented because nobody expects that kind of machine to just sit unused for a long time. After a few months we needed to start it again (can't remeber why, I think there was a delivery problem with the reagents for the new analyzer). We couldn't. The washing fluid dried and detergents and other chemicals it contained solidified inside the valves, just like it happens with an inkjet printer if left unused. They were all stuck. Repair would have been too expensive and it was scrapped. I saw this happen with a haematology analyzer too. It was kept as a backup but wasn't need for a few months. I was able to resurrect that one after several hours of repeated washing. An electrolyte analyzer is even worse. Keep it turned off for only a few hours and the electrodes will need to be replaced. I don't think any other advanced industrial machine is any different. They can't be just left unused for a while and then expect them to work. It's even more problematic if the shut down procedure isn't done right (exceeding the documented requirements) or not at all.
- Tabular-Iceberg 1y ago
  That’s what killed my suspension of disbelief watching Idiocracy. Most of the automation would have broken down in less than a day.

johnea 1y ago

Wouldn't it be better if the world totally forgot the twitverse?

waynesonfire 1y ago

We would have to git-revert linux 486 support.

roxolotl 1y ago

So taking this as the thought experiment it is what I’m struck by is that seemingly most things will completely deteriorate in the first 10-15 years. Is that accurate? Would switches mostly fail by the 10 year mark if not replaced? I’ve been looking at buying a switch for my house should I expect it to not last more than 10 years? I have a 10 year old tv should I expect it starts to fail soon?

__d 1y ago
My experience with retro computers is that things start to fail from around the 10-15 year mark, yes. Some things are still good after 30 years, maybe more, but .. capacitors leak, resistors go out of spec, etc, and that means voltages drift, and soon enough you burn something out. You can replace known likely culprits preemptively, assuming you can get parts. But dendritic growths aren’t yet a problem for most old stuff because the feature sizes are still large enough. No one really knows what the lifetime of modern 5/4/3nm chips is going to be.
protocolture 1y ago
Theres a hardware law that hardware past its half life often lives for an excessively long time. Really depends on brand and purpose but consumer hardware switches do die pretty frequently. But if you bought something like a C2960 fanless switch I would expect it to outlive me.
floating-io 1y ago
I have a 10+ year old Cisco 2960G and a pair of 10+ year old Dell R620's in my homelab, still humming happily along. So, no.

trollbridge 1y ago

I’m a little puzzled how “forgot how to make CPUs” also included “forgot how to make the mechanical part of hard drives, how to make flash memory, and how to make other chips”. I guess I don’t think of a 74xx series chip as a “CPU”?

geor9e 1y ago
I read it as: we have millions of hard drives and flash drives with a dead controller chip, so we harvest their other parts as spares. We still know how to make the spare parts from scratch, but we have so many for free.

palmotea 1y ago

This has a ton of holes: > Z-Day + 15Yrs > The “Internet” no longer exists as a single fabric. The privileged fall back to private peering or Sat links. If you can't make CPUs and you can't keep the internet up, where are you going to get the equipment for enough "private peering or Sat links" for the privileged? > Z-Day + 30Yrs > Long-term storage has shifted completely to optical media. Only vintage compute survives at the consumer level. You need CPUs to build optical media drives! If you can't build CPUs you're not using optical media in 30 years. > The large node sizes of old hardware make them extremely resistant to electromigration, Motorola 68000s have modeled gate wear beyond 10k years! Gameboys, Macintosh SEs, Commodore 64s resist the no new silicon future the best. Some quick Googling shows the first IC was created in 1960 and the 68000 was released in 1979. That's 19 years. The first transistor was created in 1947, that's a 32 year span to the 68k. If people have the capacity and need to jump through hoops to keep old computers running to maintain a semblance of current-day technology, they're definitely f-ing going to have been able to repeat all the R&D to build a 68k CPU in 30 years (and that's assuming you've destroy all the literature and mind-wiped everyone with any knowledge of semiconductor manufacturing).

3eb7988a1663 1y ago
Surely knowing something is possible would speed up the process. Transistors had to go from this neat lab idea to find more and more incremental use cases. Eventually snowballing into modern chips. If you know from the beginning that computers are a neat idea, surely that would warrant more focused R&D.
lauriewired 1y ago
> If you can't make CPUs and you can't keep the internet up, where are you going to get the equipment for enough "private peering or Sat links" for the privileged? Storage. You only need a few hundred working systems to keep a backbone alive. Electron migration doesn’t kill transistors if they are off and in a closet. > You need CPUs to build optical media drives! If you can't build CPUs you're not using optical media in 30 years. You don’t need to make new drives; there are already millions of DVD/Bluray devices available. The small microcontrollers on optical drives are on wide node sizes, which also make them more resilient to degradation. > they're definitely f-ing going to have been able to repeat all the R&D to build a 68k CPU in 30 years (and that's assuming you've destroy all the literature and mind-wiped everyone with any knowledge of semiconductor manufacturing). If you read the post, the scenario clearly states “no further silicon designs ever get manufactured”. It’s a thought experiment, nothing more.

0xTJ 1y ago

A fun read, but I do find it a bit odd that in 30 years the author doesn't think that we would have reverse-engineered making CPUs, or at least gotten as far as the mid-70s in terms of CPU production capabilities. Also, the 10k years lifespan for MC68000 processors seems suspect. As far as I can see, the 10,000 figure is a general statement on the modelled failure of ICs from the 60s and 70s, not in particular for the MC68000 (which is at the tail end of that period). There are also plenty of ICs (some MOS (the company, not the transistor structure) chips come to mind) with known-poor lifespans (though that doesn't reflect on the MC68000).

therealpygon 1y ago
Agreed. It is a whole lot easier to recreate something you know is possible than to create something you don’t know is possible.

FrankWilhoit 1y ago

The larger point is that we are going to forget a lot of things.

CuriousRose 1y ago

If humans forgot how to make new CPUs, it might finally be the incentive we need to make more efficient software. No more relying on faster chips to bail out lazy coding and make apps run lean. Picture programmers sweating over every byte like it's 1980 again.

burnt-resistor 1y ago
Probably not. Devices would run out within a generation. It ain't ever going to happen because people can write these things called books. And computer organization and architecture books already exist and there are many 10k's copies of them. What should be captured in modern computer organization books is applied science aspects of the history until now and the tricks that made Apple's ARM series so excellent. The other thing is TSMC needs to document fab process engineering. Without the capture of niche, essential knowledge they become strategic single points of failure. Leadership and logic dictate not allowing this kind of vulnerability to fester too deeply or too long.
- saulpw 1y ago
  The essential tacit knowledge can't be captured in books. It has to be learned by experience, participating in (and/or developing) a functioning organization that's creating the technology.
djmips 1y ago
That's already happening
immibis 1y ago
Programmers haven't been able to rely on CPUs getting faster for the last decade. Speeds used to double every 1.5 years or so. Now they increase 50% per core and double the number of cores... every 10 years. GPU performance has increased at a faster pace, but ultimately also stagnated, except for the addition of tensor cores.
geysersam 1y ago
Ah the good old days again, what a beautiful vision. Decadence and lazyness begone! Good luck running your bloated CI pipelines and test suits on megahertz hardware! /s

asciimov 1y ago

> … no further silicon designs ever get manufactured The problem wouldn’t be missing CPUs but infrastructure. Power would be the big one, generators, substations, those sorts of things. Then manufacturing, lot of chips go there. Then there is all of healthcare. Lots of important chips everywhere that aren’t CPUs.

M95D 1y ago
We had power for a very long time before silicon. Generators are just big coils of copper. Substations too. Solar won't work without silicon, but anything with a spinning coil of copper would. Voltmeters would need replacing with the old analog versions and humans would need to manually push switches to keep power levels constant, just like in the '50s.
- nuc1e0n 1y ago
  And a spring together with an electro-magnet can be made into a relay. They're big and slow of course, but they do the same thing as a transistor. If you can make metal into a wire you can make them. In the 1940s computers were electro-mechanical.

mahirsaid 1y ago

There will be a great tragedy to be had if that was ever a reality in the near future. The bigger questions is what if you forgot hot to make the machines that make the CPU's. That is the bigger challenge to overcome in this crisis. Only one company specializes in this field that gives big company's like TSMC Their abilities to manufacture great CPU's. The trick is to create the machine that makes them and go from there. 10nm - 2nm capabilities.

LargoLasskhyfv 1y ago
There is more to lithography than ASML catering to TSMC, Samsung, Intel. There could be https://global.canon/en/technology/nil-2023.html https://global.canon/en/technology/nil-2023.html & https://spectrum.ieee.org/nanoimprint-lithography https://spectrum.ieee.org/nanoimprint-lithography There also is https://www.searchforthenext.com https://www.searchforthenext.com & https://semefab.com/ https://semefab.com/ claiming to not need that ASML high-end stuff at all, to be competitive. As reported around 2019 amongst many others like here: https://eepower.com/new-industry-products/search-for-the-next-ltd-and-semefab-introduce-a-new-transistor-wafer-process-technology https://eepower.com/new-industry-products/search-for-the-nex... Maybe it's vaporware, because I'm unaware of anything 'big' produced there. Maybe it's only lack of funding,lack of trust because non-standard and 'unproven', inertia? Who knows? And finally the forgotten minimal.fab by Yokogawa https://www.yokogawa.com/industries/semiconductor/minimal-fab/ https://www.yokogawa.com/industries/semiconductor/minimal-fa... https://www.minimalfab.com/en/ https://www.minimalfab.com/en/ with no outrageous claims about structure size equivalence, but way faster turn-around times for prototyping, and none of the usually necessary investment in all that clean-room tech. And not to forget the push and incentive China got as 'development help' to be independent :-) I'm sure they're up to many interesting things in the near future.
RetroTechie 1y ago
In case more advanced nodes would disappear, even a semiconductor factory capable of producing eg. 200..500nm structures would already be very useful. Remember the first 32-bit cpus were manufactured on >1um processes. Never mind 8-bitters or KB-sized memory chips. Also note that IC designs, assembly programming & more, can be (and has been) done by hand. Having any kind of compute, no matter how slow by today's standards (couple MHz) helps a lot. Same for basic applications like text processing, spreadsheets, small databases, software development, etc etc.

cadamsdotcom 1y ago

It’s a bit like trying to censor a LLM: to delete such an interconnected piece of information as “everything about making CPUs” you have to so significantly alter the LLM that you lobotomize it. CPUs exist at the center of such a deeply connected mesh of so many other technologies, that the knowledge could be recreated (if needed) from looking at the surrounding tech. All the compiled code out there as sequences of instructions; all the documentation of what instructions do, of pipelining, all the lithography guides and die shots on rando blogs.. info in books still sitting on shelves in public libraries.. I mean come on. Each to their own!

Vilian 1y ago

Hopeful they forget about JavaScript too, that would be a good thing to forget

andsoitis 1y ago

what do you have to believe to be true in order for humanity to forget how to make CPUs?

mikewarot 1y ago

We'd still be able to make relays, and that's enough to do computing. If not that, then mechanical computer systems could be constructed to process data. There's enough information on machine tools and the working of iron to make all the tooling and machinery required to start an assembly line somewhere. After all, there was an assembly workshop turning out the Antikythera mechanism, there was a user guide on it. Obviously it wasn't the only one produced at the time.

delian66 1y ago
> Obviously it wasn't the only one produced at the time. It is not obvious at all to me. Where are the others like it found?

Corey_ 1y ago

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0x000xca0xfe 1y ago

Honestly, probably not much would happen. My daily driver laptop is a 2012 Thinkpad I literally pulled out of a scrap heap at my local university but it refuses to die. Moore's law has slowed enough that old hardware is slow but still perfectly capable to run 99% of existing software. Already existing machines would give us at least one or two decades to restart manufacturing from zero and that is more than enough time to avoid existential problems. And most computers are under-utilized. The average gaming PC is powerful enough to run the infrastructure for a bunch of small companies if put to work as a server.

nxobject 1y ago

The author’s a little bit too optimistic about the longevity of old consumer market computers: having collected vintage compact Macs, you become keenly aware of all of the possible points of failure like CRT displays, storage devices, and even fragile plastics. We may have to go back to much more analog forms of I/O: typewriter teletype with decreasing levels of logic integration, random access DECtape-style magnetic tape, etc.

hglover945 1y ago

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