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Man Builds Giant Homemade Computer To Play Tetris (bbc.com)

An anonymous reader quotes a report from BBC: A man has finished building an enormous computer in the sitting room of his bungalow in Cambridge. James Newman started work on the "Megaprocessor," which is 33ft (10m) wide and 6ft (2m) high, in 2012. It does the job of a chip-sized microprocessor and Mr Newman has spent $53,000 creating it. It contains 40,000 transistors, 10,000 LED lights and it weighs around half a ton (500kg). So far, he has used it to play the classic video game Tetris. Mr Newman, a digital electronics engineer, started the project because he was learning about transistors and wanted to visualize how a microprocessor worked. The components all light up as the huge device carries out a task. Mr Newman hopes the Megaprocessor will be used as an educational tool and is planning a series of open days at his home over the summer. You can watch a video demonstration of the monstrosity here.

127 comments

  1. DEC Logo as icon? by devphaeton · · Score: 5, Informative

    Why the Digital Equipment Corporation logo as the icon for this story (and other DIY stuff)?

    Has /. gotten so young that nobody knows it means something more than just "digital", or has /. gotten so old that nobody remembers DEC?

    --


    do() || do_not(); // try();
    1. Re:DEC Logo as icon? by Anonymous Coward · · Score: 0

      Neither. It's because all the DECs are used for spare parts in these monstrously huge home projects. We've got 3 PDPs here at work that are basically just skeletons since we've stripped all the gadgets that could be used to make anything remotely useful.

    2. Re: DEC Logo as icon? by Anonymous Coward · · Score: 0, Funny

      Probably just to piss off whiners like you.

    3. Re:DEC Logo as icon? by Nethemas+the+Great · · Score: 1

      I'll go with the first one. DEC would exclude the millennials and most definitely BeauHD. Now I'm feeling old. Thanks a lot Beau!

      --
      Two of my imaginary friends reproduced once ... with negative results.
    4. Re:DEC Logo as icon? by OzPeter · · Score: 1

      Complained about this the last time this logo was used. It's becoming an onion on my belt thing.

      To these kids everything is "digital"

      --
      I am Slashdot. Are you Slashdot as well?
    5. Re:DEC Logo as icon? by rudy_wayne · · Score: 1

      Has /. gotten so young that nobody knows it means something more than just "digital"

      Replace "young" with "brain dead editors" and you have your answer.

    6. Re:DEC Logo as icon? by DRJlaw · · Score: 1, Interesting

      Has /. gotten so young that nobody knows it means something more than just "digital", or has /. gotten so old that nobody remembers DEC?

      Or has DEC been dead and buried for so long (18 years) that someone has decided to repurpose the graphic simply because they can?

      *BINGO*

      DEC, dead. Compaq, dead. HP, dead enough.

      Let it go.

    7. Re:DEC Logo as icon? by fred911 · · Score: 1

      Why do you bother with icons (options icons)? Ever since /.media reneged on the "thanks click here to reject ads" link, I've reinstalled ABP. Looking at icons? No thanks.

      --
      09 F9 11 02 9D 74 E3 5B - D8 41 56 C5 63 56 88 C0 45 5F E1 04 22 CA 29 C4 93 3F 95 05 2B 79 2A B2
    8. Re:DEC Logo as icon? by Anonymous Coward · · Score: 0

      They won't stop it until they're hacked or sued.

    9. Re:DEC Logo as icon? by WarlockD · · Score: 1

      Possibly because of the size and that older DEC computers were built with "off the shelf" DEC logic modules. Similar to how this computer was built with logic modules connect to each other by cables.

    10. Re:DEC Logo as icon? by sconeu · · Score: 1

      HP is only MOSTLY dead...

      --
      General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.
    11. Re: DEC Logo as icon? by Anonymous Coward · · Score: 0

      I have a DEC branded PC that has a Pentium 1 processor. I think its a 133 MHz. It's metal in all the important places, so feels like old DEC hardware. I also have a MicroVAX 3100.

      The first time I went online at home it was with a DECWriter printing terminal and a 300 baud acoustic coupler. It was before I had a 'real' computer. The 'backlog' from eacl login session to a BBS was fanfold paper. I'm an IBM brat, (my father worked his whole career with big blue, he programmed on the 650) so I was never really around DEC hardware back in the day. The first home computer we had was an IBM 5100 that my father sometimes brought home for the weekend.

      I wanted to make a 'computer' as a child, but the published plan I encountered in a book in the school library was basically a digital up/down counter as a calculator, made up of discrete transistors with a telephone dial as the input device and lamp indicators. For some reason it was designed with flip flops that used expensive and bulky 2N3055 transistors, the ones in the TO-3 can. Looking at it from hindsight, the project should have used inexpensive transistors like 2N2907s. No way could I afford expensive power transistors back in Jr. High, so the project was unapproacable.

    12. Re: DEC Logo as icon? by Bing+Tsher+E · · Score: 1

      But older IBM computers were made with cards like that (one or a few flip flops per card) and they didn't use an IBM logo for the article. A better icon for this sort of article would be a transisrtor symbol, or maybe a soldering iron ( Steve Ciarcia used to say he wrote his best code in solder).

    13. Re:DEC Logo as icon? by tlhIngan · · Score: 0

      Why the Digital Equipment Corporation logo as the icon for this story (and other DIY stuff)?

      Has /. gotten so young that nobody knows it means something more than just "digital", or has /. gotten so old that nobody remembers DEC?

      The logo has fallen into public domain as well, I believe. I've been seeing tons of things with that logo on it - from music audio processing boxes to practically anything needing a fancy "digital" logo.

    14. Re:DEC Logo as icon? by skids · · Score: 1

      Yeah, they should have used a cray logo. Because this is cray cray.

    15. Re:DEC Logo as icon? by RavenLrD20k · · Score: 1

      Unfortunately for HP, I think the only purpose they have for existing anymore is "to blave"(sic).

    16. Re:DEC Logo as icon? by RavenLrD20k · · Score: 1

      Because this is cray cray

      I think I just puked a little. Really.

    17. Re:DEC Logo as icon? by apoc.famine · · Score: 1

      My reaction too. I keep seeing the bitching posts, but I don't see the icons that people are bitching about. Love that on /. of all places that the bitching gets upvoted. What happened to being tech savvy enough to block the shit that irritates you on the web?

      --
      Velociraptor = Distiraptor / Timeraptor
    18. Re:DEC Logo as icon? by Sir_Eptishous · · Score: 1

      Why doesn't one of the enterprising young editors for /. come up with their own "Digital" graphic image to use on /.?
      Why reuse the corporate logo from a company from the beginnings of the digital era?
      Laziness is the answer.

      --
      We play the game with the bravery of being out of range
    19. Re:DEC Logo as icon? by Agent0013 · · Score: 1

      Too bad they can't get Miracle Max to help them out. Nobody has seen him around these parts for quite a while.

      --

      -- ssoorrrryy,, dduupplleexx sswwiittcchh oonn.. -Quote found on actual fortune cookie.
    20. Re:DEC Logo as icon? by bobwyman · · Score: 1

      There are still some of us who remember DEC. I joined DEC in 1979 and left Digital in 1991. Those were the good old days...

  2. In Cambridge by Anonymous Coward · · Score: 0

    Tetris Plays You

    1. Re:In Cambridge by Big+Hairy+Ian · · Score: 1

      For his next project he plans to make an IWatch the size of the Chrysler Building.

      --

      Build a Man a Fire, and He'll Be Warm for a Day. Set a Man on Fire, and He'll Be Warm for the Rest of His Life.

  3. site is tanked by Anonymous Coward · · Score: 0

    MP4 file that wont play currently.

    1. Re: site is tanked by Anonymous Coward · · Score: 0

      Looks like it's taking about 10 minutes to download that mp4 either the site is over loaded or hosting on a shitty connection

    2. Re:site is tanked by plover · · Score: 4, Informative

      He uploaded them to YouTube a few days ago. https://www.youtube.com/watch?... is the grand tour. From there, you can find links to the other videos.

      --
      John
    3. Re:site is tanked by Anonymous Coward · · Score: 0

      Bro sucks at tetris.

    4. Re:site is tanked by Anonymous Coward · · Score: 0

      Man, for someone who spent so long building a computer that plays Tetris, I've never seen someone fail so badly at actually playing it.

    5. Re:site is tanked by shaitand · · Score: 2

      You have to grant that his tetris game is moving very fast, he probably has the timing connected to the speed of his megaprocessor and at that point in the video has it set at max.

      But even allowing for that, he isn't exactly playing well.

  4. Megaprocessor promptly died of slashdotting n/t by spiritplumber · · Score: 1

    Megaprocessor promptly died of slashdotting n/t

    --
    Liberty - Security - Laziness - Pick any two.
    1. Re:Megaprocessor promptly died of slashdotting n/t by Anonymous Coward · · Score: 0

      Second that.

  5. Video mirror by Anonymous Coward · · Score: 3, Informative

    http://web.archive.org/web/20160705214332/http://www.megaprocessor.com/Images/megaprocessor-tour1-2mbps.mp4

    I haven't seen a slashdotting in quite a while. I tried to dig up some mirrors (MirrorDot, CoralCDN, etc), but they're all dead now. Internet Archive to the rescue

    1. Re:Video mirror by NotInHere · · Score: 5, Funny

      Probably because the webserver is running on that machine as well.

    2. Re:Video mirror by Anonymous Coward · · Score: 1

      if only there was free video hosting available online that could handle spikes...

    3. Re:Video mirror by fabioalcor · · Score: 2

      Just found a faster mirror: https://www.youtube.com/watch?...

    4. Re:Video mirror by Anonymous Coward · · Score: 0

      BeauHD decided to link to a 93 MB mp4 video from Slashdot.
      Of course that's not going to work, what was he thinking...
      Seriously. As if that would ever stay up.
      Even Slashdot itself would go down if Slashdot linked to a 93 MB mp4 file on Slashdot.

    5. Re:Video mirror by Anonymous Coward · · Score: 1

      BeauHD decided to link to a 93 MB mp4 video from Slashdot.
      Of course that's not going to work, what was he thinking...

      He wasn't thinking. He's the same asshole who constantly posts links to Forbes and other websites who block access unless you turn off adblocking and expose yourself to malware.

    6. Re:Video mirror by shaitand · · Score: 1

      Yes, now if the editor would just replace the link TFS with the youtube link the guy might not be bankrupt tomorrow...

    7. Re:Video mirror by tepples · · Score: 1

      if only there was free video hosting available online that could handle spikes...

      Some video hosts can handle spikes but will take down videos at the drop of a hat, especially when Tetris clones are involved. Arika Co., Ltd, developer of an official Tetris game, sent a bunch of DMCA takedown notices to YouTube in May 2009, and one of these videos was a video about The Tetris Company's copyright enforcement practices.

    8. Re:Video mirror by Triklyn · · Score: 1

      i learned something today... i learned that there are people out there that really suck at tetris.

  6. Raspberry Pi INFINITY! by berchca · · Score: 2, Interesting

    Kilo-for-kilo, the cheapest hobby computer money can buy!

    1. Re: Raspberry Pi INFINITY! by Bing+Tsher+E · · Score: 2

      The cheapest hobby computer would probably be a PIC 10F202. In the little 6 or 8 pin package they are 10 cents or so in quantity, the tools to code them are free and the hardware to flash the binary object into them is a few dollars. The 24 bytes of RAM and 512 bytes (12 bit words, really) of program memory keeps the coder honest and frugal.

    2. Re:Raspberry Pi INFINITY! by Opportunist · · Score: 1

      Hardware is generally a fairly cheap hobby. The initial costs for soldering equipment, etching, measuring (oscilloscope+logic analyzer) and so on set you back a few 100, after that you're looking at pennies for hours and hours of fun and entertainment. And given that the IoT is coming really soon now (tm), it can well be fun and profit.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    3. Re: Raspberry Pi INFINITY! by shaitand · · Score: 1

      Yup. In more recent times I've used arduinos and raspberry pi's for most things but I do still keep quite a reserve of PIC processors.

    4. Re:Raspberry Pi INFINITY! by shaitand · · Score: 1

      Indeed, a good chunk of IoT type sensors and devices I have around the house I made myself.

      But it also depends on what you want to do/make. More and more keeping up with the Joneses means not just getting custom boards but being able to solder ball grid arrays. You need hot air skills, infrared gear, masks, etc.

  7. Enigma tetris by invictusvoyd · · Score: 1

    On other thought , folks at Bletchley Park would have summarily executed this person for building something to play tetris.

  8. That's real nice but by Anonymous Coward · · Score: 0

    In b4 lawsuit from The Tetris Company LLC, who guard their product and trademark with a jealousy that makes Yaweh look like a hippy.

    1. Re:That's real nice but by Opportunist · · Score: 1

      Now, now, now... even the copyright industry didn't try to make the bible copyrighted.

      Although... Copyright is lifetime of the author + 70 years. How does this work with immortal beings? Is it possible to file suit on behalf of someone? Jewish God vs. Roman Catholic Church et al (the rest of the different flavors of zombie jesus freaks, essentially), over copyright on the bible. After all, the original author is still alive, being a being that transcends space and time.

      I don't want to be the judge that has to say that either that god doesn't exist (at least not in the form propagated in the bible) or that the various christian churches have to stop publishing the old testament. But I sure want to read that verdict!

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    2. Re:That's real nice but by shaitand · · Score: 1

      "Although... Copyright is lifetime of the author + 70 years. How does this work with immortal beings? Is it possible to file suit on behalf of someone? Jewish God vs. Roman Catholic Church et al (the rest of the different flavors of zombie jesus freaks, essentially), over copyright on the bible. After all, the original author is still alive, being a being that transcends space and time."

      The bible would not settle this issue. The authors are undisputed humans that are all long since dead regardless of who they were (which is disputed). god is alleged only to have inspired those authors and the copyright goes to the author and not his muse.

    3. Re:That's real nice but by Opportunist · · Score: 1

      Uh... I don't know if that's really so undisputed. At the very least that 10 commandment part is often claimed that it has been done by the big cheese himself.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    4. Re:That's real nice but by shaitand · · Score: 1

      Nope, Moses wrote those based on conversations with a burning bush. At least according to the bible. I know lots of things like to depict it like the stone is being zapped by god and shaped in movies and such but that is all theatrical drama. He talked to the bush and chiseled the commandments himself.

      If you weren't paying your assistant, your assistant would hold the copyright on a dictated letter not you. You only get the copyright because it's produced as a work for hire. It isn't even made clear from the text if the commandments are even a quotation and god didn't send Moses back down off the mountain with a sack of gold for the work.

    5. Re:That's real nice but by Opportunist · · Score: 1

      I guess one could argue that the so called "prophets" are doing "the Lord's work", i.e. can be considered to be employed by that god. And monetary compensation for their subjects has never really been big with churches, they usually get away with giving out "His love" or similar rather intangible assets, which is considered sufficient compensation by those "chosen ones".

      Worked for religions throughout the ages. I guess we can thus assume with sufficient evidence that, at least according to the bible, which has not been challenged by anyone who could (i.e. Moses in this case, because nobody else was around when the burning bush talked to him... and I have a hunch even if there had been anyone around, the stories would probably diverge), that the originator of the ten commandments was the hallucination, I mean, god in the form of a burning bush, and that Moses was just, as it's often called, "The Lord's tool".

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
  9. 33' x 6' by Anonymous Coward · · Score: 1

    An educational tool to show how people waste money....

  10. He did NOT build it "to play tetris" by plover · · Score: 5, Informative

    He built it because he could, of course, but he's planning on it becoming an educational display. It's just that a computer with no actual applications is a pretty boring thing for non-techies to behold.

    --
    John
    1. Re:He did NOT build it "to play tetris" by WarlockD · · Score: 2

      I am sure even non-techies think this is impressive. Each one of those modules for that computer would of had to be assembled and tested by hand. Even then this is no simple HACK computer. It has square root for christ sakes (even if it is a bit long in cycles). This thing is WAY over-engineered yet very pretty to look at.

      I'd be interested to know how modeler it is. That is can you move the logic modules around to change the instructions with the way he has those cables connected. I always liked the idea of the DEC plug in modules. Where all you needed was a properly wired back-plane and poof, computer.

    2. Re:He did NOT build it "to play tetris" by amicusNYCL · · Score: 1

      The entire time watching the video I was thinking about having to debug it. Finding the transistor that doesn't work anymore or the wire that broke inside the insulation has to be a fun exercise in narrowing down the problem until you've found the cause.

      --
      "Our two-party system is like a bowl of shit looking at itself in a mirror." - Lewis Black
    3. Re:He did NOT build it "to play tetris" by shaitand · · Score: 1

      I'd got a step further and say that ONLY techies would be interested.

  11. This is news for nerds by Nkwe · · Score: 5, Insightful

    This is a prime example of what should be on the site. Thanks )

    1. Re:This is news for nerds by hcs_$reboot · · Score: 1

      In this case that's news about a nerd.

      --
      Slashdot, fix the reply notifications... You won't get away with it...
    2. Re:This is news for nerds by Anonymous Coward · · Score: 0

      Agreed. This guy put in an amazing amount of effort into building this thing and not only does it look amazing but it's legitimately useful for teaching.

      This got me thinking about how cool something like this would have been when I was younger. While it might not be practical or cheap as it is imagine something like this implemented in an interactive VR simulation that you could modify and play with without worrying about damaging anything!

    3. Re:This is news for nerds by Anonymous Coward · · Score: 0

      +

      More hacker news, /.. This is what this site should always have been about.

    4. Re:This is news for nerds by ripvlan · · Score: 2

      I agree - this was terrific. Very inspiring - one of those "I want to build one too." I remember way-back in college the instructor showed on the chalkboard how an ALU works (it was a 90 minute lecture). He drew clock lines - a few gates, memory, and a few binary instructions. He then walked through each clock tick - moved bits around - and visually showed the "computer" executing the instructions (it was something simple like Add two values and store in memory). But it made me sit up and notice. No longer was a computer this weird unimaginable thing that had Forces and Electrons and Fields and blah blah blah.

      Next morning I went to another EE class where the instructor started the day (8am) describing how to compute the force on an electron in a wire. I promptly quit Electrical Engineering and went to Computer Science. Computer chips - we have people for that ;-)

    5. Re:This is news for nerds by shaitand · · Score: 1

      "but it's legitimately useful for teaching"

      Eh? You really need to understand quite a bit about how a microprocessor works before those blinking leds mean anything to you and at that point you don't really need them anymore.

      Building this would certainly be a great way to learn how a microprocessor works though.

    6. Re:This is news for nerds by Anonymous Coward · · Score: 0

      Next morning I went to another EE class where the instructor started the day (8am) describing how to compute the force on an electron in a wire. I promptly quit Electrical Engineering and went to Computer Science. Computer chips - we have people for that ;-)

      But you were so close to learning how Hall effect sensors work :). FWIW I love hardware and am a huge nerd but even I was bored out of my mind by swathes of solid state electronics we did. Your chosen minimum level of abstraction is computer chips. My chosen minimum level of abstraction is BJTs, FETs, triodes (they're fun) and the like.

    7. Re:This is news for nerds by Anonymous Coward · · Score: 0

      I whole heartedly agree! It's been a long time since I've seen something on facebook, that caused me a less productive day at work, all the while learning a lot!

      Wonderful share!

  12. Wow he's even worse at Tetris than I am by localroger · · Score: 2

    Maybe he should have gone for Space Invaders?

    --
    Brackets contain world's first nanosig, highly magnified:[.]
  13. obligatory Beowulg ref by Anonymous Coward · · Score: 0

    imagine a Beowulf cluster of those !

    1. Re:obligatory Beowulg ref by Anonymous Coward · · Score: 1

      imagine a Beowulf cluster of those !

      If we do, it would be called Colossus and be built inside a mountain with Gamma ray traps all around it.. and we all know what that leads to..

    2. Re:obligatory Beowulg ref by RavenLrD20k · · Score: 1

      But where would I set up my bed? On a bright note, at 500W per unit, I wouldn't need a heating system.

    3. Re:obligatory Beowulg ref by Anonymous Coward · · Score: 0

      All we'll lose is the emotion of pride.

  14. Dosage by namgge · · Score: 0

    Apparently, someone needs to up their meds...

  15. I guess it's true then ... by Anonymous Coward · · Score: 1
    1. Re:I guess it's true then ... by Anonymous Coward · · Score: 0

      I've had my system running, I'll admit its not the best.
      The data isn't right, and the response time is a mess.
      It crashes every hour and it isn't worth a damn,
      But I'm satisfied because it runs just like an IBM!

      Lel, this made my day.

  16. Do Processing unit makers build alikes? by sergiol · · Score: 1

    I could bet that Processing Units manufacturers (Intel, ATI/AMD, NVidia, ARM,etc.) had built things like this internally before, for years. just to understand better what they are doing.

    Can any insider of those companies confirm or deny my conjecture, please?

    1. Re:Do Processing unit makers build alikes? by localroger · · Score: 4, Informative
      This is actually the way real computers were built in the 1950's and most of the 1960's. Integrated circuits weren't invented until the late 1960's, and integrated microprocessors in the mid-1970's. Before that if you had a computer, it was built like this (or even more primitively, with vacuum tubes and delay lines for memory). Although this video doesn't mention it the Megaprocessor is actually a clone of the 6502, based on the reverse engineering of that chip which was done by the visual6502 people. Actual discrete transistor designs were a bit more streamlined to reduce the discrete component count.

      The people who built early microprocessors mostly didn't bother emulating them first because they had a lot of experience with discrete design; processors were not mysterious to them and they had confidence that they knew what would work. The 6502 was in fact laid out entirely by hand directly in MOS masks, not more abstract circuit diagrams, and had to be reverse engineered in our day because no record remained of how its fine features worked.

      --
      Brackets contain world's first nanosig, highly magnified:[.]
    2. Re:Do Processing unit makers build alikes? by Guy+Harris · · Score: 2

      Although this video doesn't mention it the Megaprocessor is actually a clone of the 6502, based on the reverse engineering of that chip which was done by the visual6502 people.

      No, you're thinking of the MOnSter 6502. The Megaprocessor has its own instruction set, with 4 (semi-)general purpose registers (some load and store instructions can only use R0 or R1 as the register source/destination and R2 or R3 as an index register).

    3. Re:Do Processing unit makers build alikes? by K.+S.+Kyosuke · · Score: 1

      Integrated circuits weren't invented until the late 1960's

      That's not really true, the AGC was using IC gates around 1962 already.

      Although this video doesn't mention it the Megaprocessor is actually a clone of the 6502, based on the reverse engineering of that chip which was done by the visual6502 people. Actual discrete transistor designs were a bit more streamlined to reduce the discrete component count.

      Which is peculiar because the 6502 should have not nearly as many as 40k transistors. (If I were building a CPU out of discrete transistors, I'd definitely go for some kind of stack machine, perhaps with unencoded instructions to boot.)

      --
      Ezekiel 23:20
    4. Re:Do Processing unit makers build alikes? by clovis · · Score: 4, Interesting

      When I was somewhat younger, I was a so-called field engineer responsible for keeping some discrete element computers running.

      Here's a picture of a module. This would be a single logic element such as a flip-flop, NAND gate, OR, etc.
      https://www.etsy.com/listing/2...

      The CPU cabinet was a huge box full of these things. The I/O controllers were in another cabinet, and the memory was in another cabinet.
      The other boxes (storage, printers, card readers) had these same modules in them.
      I never was main support for a CPU using those modules, but had some peripherals that had those things inside.

      In more modern computers, these modules were replaced by logic cards. A PCB would have the transistors/diodes, etc to make a single element such as NAND gates, flip-flops or whatever, and these cards might have as many as 4 or even 6 logic elements on a single card. woo-eee!
      I was lucky to be supporting such modern machines.

      These old machines required hand-tuning such as manually synchronizing the clock signals between the near and far part of the cabinets.

      The oldest machine I had to maintain was an 80 column card reader that used mechanical relays for all the logic elements. That was so long ago that the nightmares have stopped.

    5. Re:Do Processing unit makers build alikes? by Guy+Harris · · Score: 1

      Integrated circuits weren't invented until the late 1960's

      That's not really true, the AGC was using IC gates around 1962 already.

      Perhaps they're thinking of MSI, which first showed up in the late 1960's; SSI predated that.

      Although this video doesn't mention it the Megaprocessor is actually a clone of the 6502, based on the reverse engineering of that chip which was done by the visual6502 people. Actual discrete transistor designs were a bit more streamlined to reduce the discrete component count.

      Which is peculiar because the 6502 should have not nearly as many as 40k transistors.

      And, in fact, the 6502 had more like 3.5k transistors; the MOnSter 6502, which is what the "clome of the 6502" person was actually thinking of, has about 4300 transistors.

    6. Re:Do Processing unit makers build alikes? by jeremyp · · Score: 1

      Which is peculiar because the 6502 should have not nearly as many as 40k transistors.

      That's explained by the fact that it is not a 6502. The processor architecture is his own 16 bit design. This is a really impressive achievement. He designed the processor architecture from scratch, wrote an assembler and simulator and then built the thing out of (mostly) discrete transistors.

      --
      All I want is a secure system where it's easy to do anything I want. Is that too much to ask ~~ Randall Munroe
    7. Re:Do Processing unit makers build alikes? by K.+S.+Kyosuke · · Score: 1

      I would have been more impressed by a 16 bit design with 4k transistors. ;) Even better, by a design automatically generated rather than hand-designed, which is what everyone has been doing for the past seven decades, usually with dismal results.

      --
      Ezekiel 23:20
  17. Similar to the MOnSter6502 by Guy+Harris · · Score: 4, Informative

    Somebody else built a discrete-transistor 6502 processor.

    And, of course, there's the non-integrated-circuit TTL 8008, although that was probably SSI or MSI, not discrete transistors.

    1. Re:Similar to the MOnSter6502 by hcs_$reboot · · Score: 1

      And no need to say you could emulate whatever processor of yours on a PC, showing virtual LEDs or anything, within a day of dev,

      --
      Slashdot, fix the reply notifications... You won't get away with it...
  18. Cambridge ? by rossdee · · Score: 1

    Cambridge where?
    The one in England comes to mind, but theres also one in MA (and in umpteen other staes
    Theres even one in the Waikato (NZ)

    1. Re:Cambridge ? by Wagoo · · Score: 2

      of course England.. if it was one of the others THEN it would need to be specified :)

    2. Re:Cambridge ? by amicusNYCL · · Score: 1

      When someone speaks with an English accent and refers to "Cambridge" without mentioning the state, country, etc, obviously they are referring to the Cambridge in the Waikato in New Zealand. Everyone knows that.

      When in doubt, look it up on Wikipedia and see which one pops up with the link to the disambiguation page. That's probably the one they're referring to.

      --
      "Our two-party system is like a bowl of shit looking at itself in a mirror." - Lewis Black
  19. And ladies... by ClickOnThis · · Score: 1

    ...he's single.

    --
    If it weren't for deadlines, nothing would be late.
    1. Re: And ladies... by Anonymous Coward · · Score: 0

      I'd like to point out. His Tetris skills suck.

    2. Re: And ladies... by Anonymous Coward · · Score: 0

      "Oh don't marry him. He'll never tidy up."

      Not like this lad:

      http://pbfcomics.com/206/

    3. Re:And ladies... by Tony+Isaac · · Score: 1

      Of course! No married man's wife would put up with this huge contraption in the living room!

  20. Why? by Locke2005 · · Score: 0

    When I was a kid, I started designing a computer that could play tic-tac-toe using only mechanical relays. About the time I realized how many thousands of relays were required, I decided it wasn't worth the effort. I don't understand this guy's thought processes... why spend thousands of dollars and use up half your house for some you could easily do with a $5 Rasberry Pi Zero?

    --
    I've abandoned my search for truth; now I'm just looking for some useful delusions.
    1. Re:Why? by Anonymous Coward · · Score: 2, Insightful

      why spend thousands of dollars and use up half your house for some you could easily do with a $5 Rasberry Pi Zero?
      Flag as Inappropriate

      Because he can and because he presumably enjoyed doing so.

      It's the same reason some hobbyists still photograph with 19th-century film technology and it's part of the reason some amateur radio operators still use Morse Code (well, that, and because it may work when other ways of communicating over radio won't work as well, as efficiently, or at all under a given set of conditions).

    2. Re:Why? by Anonymous Coward · · Score: 1

      Why collect cars, trade cards, go fishing, hiking, play games, etc, etc? Because it's something you enjoy!

      In this instance he built something that he was able to share with others and hey, it's pretty cool as well :)

    3. Re:Why? by serviscope_minor · · Score: 1

      WTF? How on earth can you build a computer from scratch by buying a pre-build computer for $5?

      Or do you actually think the purpose of this was to play tetris?

      --
      SJW n. One who posts facts.
    4. Re:Why? by OrangeTide · · Score: 1

      why spend thousands of dollars and use up half your house for some you could easily do with a $5 Rasberry Pi Zero?

      why do anything at all, you can experience everything you want by simply watching someone else do it online.

      --
      “Common sense is not so common.” — Voltaire
  21. I want one that drops actual blocks by MobyDisk · · Score: 1

    Can someone make a Tetris game that drops actual physical blocks down? Maybe on pulleys. Bonus points if filled rows actually explode.

  22. totally badass by Anonymous Coward · · Score: 0

    Really nice construction.

    I think the memory card with LED per bit is outstanding!!

  23. Wow. by Anonymous Coward · · Score: 0

    You can do all that in one week with a bread board or two. You'll still learn as much.

  24. Great! by Anonymous Coward · · Score: 0

    ...but can it play Crysis?

    1. Re:Great! by OrangeTide · · Score: 1

      It's Turing complete, so yes.

      --
      “Common sense is not so common.” — Voltaire
  25. Wait, this isn't clickbait. by germansausage · · Score: 5, Funny

    How can this be? An actual tech story on slashdot. Nothing about creationism, obese people, the lack of women in STEM or mass shootings. Maybe I'll see if it happens again tomorrow.

    1. Re:Wait, this isn't clickbait. by Anonymous Coward · · Score: 0

      How can this be?

      I don't want to insinuate anything, nor cause a panic, but I do advise everyone to change their password.

    2. Re:Wait, this isn't clickbait. by Tablizer · · Score: 1

      "Obese creationist women shoot up office because of lack of STEM opportunities."

  26. NoScript by mister_playboy · · Score: 0

    If you were really concerned about malware exposure, you'd be running NoScript.

    One of NoScript's useful features is blocking ad-blocking access blocks.

    Then you could RTFA safely if you cared to.

    --
    Do what thou wilt shall be the whole of the Law ::: Love is the law, love under will
  27. Visual computing by Waccoon · · Score: 3, Interesting

    The LEDs are the coolest part. I've had trouble seeing the video on his site since it's downloading very slowly, but I love what I'm seeing so far.

    Stuff like this reminds me of RAM scanning and memory ripping back in my Amiga days. Since the Amiga had no MMU and the video chip could address the entire range of the machine's main "chip" RAM, it was popular to fiddle with the screen display and scan through system memory. You could actually watch your computer running programs in realtime. The Amiga also used planar graphics, so you could see individual bits, rather than bytes, as pixels, allowing you to identify which memory locations were used for counters, timers, disk control logic, mouse pointer coordinates, and more. I wrote a whole bunch of programs in AMOS Basic that let me directly edit memory by drawing on the screen, bubble sort graphics, visually highlight specific memory addresses used by games, and do all kinds of cool nonsense.

    I miss those days when you could read any memory address without needing signed drivers and such. I've always wondered why memory visualization has totally disappeared. It might make for some interesting lessons in how modern programs actually use memory and how memory leaks happen.

    1. Re: Visual computing by Bing+Tsher+E · · Score: 4, Interesting

      I used to visually monitor small computers running by using a pair of 8 bit DACs connected to the address bus with the analog outputs connected to the X and Y of an oscilloscope in XY vector mode. Where the scope trace moved around on the screen showed the branching locations of the CPU. Even without really understanding which exact locations the processor was running through you could get a heuristic view of the program in action.

    2. Re: Visual computing by Waccoon · · Score: 2

      Sweet. Audio RAM scans were pretty popular, too. It was always fun to play back memory and listen for certain patterns and guess what kind of data it was, which was easy in the days before everything was compressed (or encrypted).

      Closest thing I've heard that was similar to what you were doing is when engineers would put an AM radio next to a PDP-11 computer, and listen to the CPU working. By programming the CPU with differently timed loops, they could produce music over the radio.

  28. Pulleys? Meh.. by Anonymous Coward · · Score: 0

    Two words: 3D Printing (OK, the first word is arguably a mnemonic for two words, but close enough).

  29. So cool too! by Narcocide · · Score: 1

    I am totally jealous.

  30. I wish DEC still existed by Anonymous Coward · · Score: 0

    I remember dreaming about working there when I was young. Such a bastion of computer engineering creativity and ingenuity of its time. So sorry that they got swallowed by HP, which is a husk of its former self.

  31. Couldn't he just... by Anonymous Coward · · Score: 0

    ... emulate it with software in a modern computer?

    (Duck and cover)

  32. How about doing the same, but with Contactors? by Anonymous Coward · · Score: 0

    How about doing the same with contactors instead of transistors? ...or water flowing on transparent pipes instead of electricity and PCBs?
    (and "hydraulic-mechanic" transistors)

    Just need to write a compiler from Verilog/VHDL to 3D printer output ;)

  33. very old news... by Anonymous Coward · · Score: 0

    ...slashdot news from the dinosaurs....

  34. Very neat project. by Qbertino · · Score: 1

    This is an impressive learning device.

    The man should get a grant from some large software corp like MS or something to build a few of these and place them in education centers and science-museums.

    --
    We suffer more in our imagination than in reality. - Seneca
  35. Yea but can it... by Anonymous Coward · · Score: 0

    Run Windows???

  36. James May Man Lab? by ripvlan · · Score: 1

    hmmm -- might I suggest this is a topic for a modern James May to bring this subject to life?

    1. Re:James May Man Lab? by rewindustry · · Score: 1

      would second this if only to get more of the above to watch.

      however i do not think may and his lot would have the chops for this.

      it doesn't actually move - and may is not that slow.

    2. Re:James May Man Lab? by ripvlan · · Score: 1

      Capt Slow vs 1 Hz? I dunno - might be a tight race.

      Yes it doesn't move. But his "toy" challenges like the Legos house, toy train, and race track brought something interesting to life in an enthusiastic manner. If nothing else his enthusiasm and wit could make this computer more-cool.

  37. That is AWESOME!!! by Anonymous Coward · · Score: 0

    LOVE these sorts of Rube Goldberg machines!! Great educational tool for kids. Hope he donates to a children's computer museum.

  38. where is the rest of the memory? by rewindustry · · Score: 1

    in the video, i see display ram, but i did not hear or notice anything about core/process storage.

    always wanted to do something like this myself - bravo, bis, encore.

  39. Bitcoin by lerxstz · · Score: 1

    So THIS is the guy getting all the bitcoins!

    --
    I chose to end my comments, not with a rim shot, but a long decaying F#7sus4
  40. Translation copyright by tepples · · Score: 1

    even the copyright industry didn't try to make the bible copyrighted.

    All well-known translations of the Bible into modern English are copyrighted with a non-free license except one: the World English Bible.

  41. why not simulate? by crgrace · · Score: 1

    This is very cool, but if the reason he did it was because "microprocessors were opaque" he should have just simulated it in Verilog or VHDL. Then he could follow all the operations he wanted at whatever detail he liked.

  42. Yes Slashdot. by Culture20 · · Score: 1

    More of these types of articles please. These are the things mass media does not report.

  43. You're right, thanks for the correction /nt by localroger · · Score: 1

    necessary text

    --
    Brackets contain world's first nanosig, highly magnified:[.]
  44. Suspicious purpose by Bristol_92 · · Score: 1

    There is nothing unusual about it, to be sure, our world is full of computer genius. This event attracts only for the creation purpose. But do you really think that this Megaprocessor was made to play tetris??

  45. Minecraft by jwhitener · · Score: 1

    He should have built it in Minecraft (like many others have done to various degrees) and saved himself 50 grand. Museums could have virtual tours of the thing:) Kids would love that. Put on your VR googles in the museum, and wander around the computer with your digital avatar, while a real person gives the tour to you via a headset.