A classic Commodore 64 repair!

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  • Опубликовано: 23 янв 2025

Комментарии • 80

  • @PresJPolk
    @PresJPolk 11 месяцев назад +16

    I'm glad you're willing to make videos like this. A common trap I see a lot of channels like yours fall into, is that you chase an ever-increasing level of production quality, to the point where it actually harms your ability to put out videos at all.
    Lots of channels exist about old computers. The unique quality about your channel is you. Be yourself.

    • @retrobitstv
      @retrobitstv  11 месяцев назад +1

      This is very insightful and you've really hit the nail on the head. From the beginning I've been chasing production quality and a lot of time went into videos that ended up under-performing. In order to stave off potential burnout, in 2024 I'm committing to trying out new styles, hosting more livestreams, and not chasing the algorithm by only making videos of stuff that I want to see. Thank you for the feedback and encouragement 🙏

    • @jandjrandr
      @jandjrandr 10 месяцев назад +2

      I have to agree. It is important not to get "stuck in the weeds" as they say trying for perfection. You want to provide good content of course, but the most important aspect is just be you. You will get the right group of people wanting to watch your content then.

  • @JanBeta
    @JanBeta 11 месяцев назад +13

    Very well done and I actually like these kinds of less planned-through videos a lot! Unfortunately the 6510s fail quite frequently in my experience. :/ One little thing I noticed: while testing the voltages, you should also test the 5V rail coming directly from the power supply (for example on the user port), as that rail powers most of the ICs in these older breadbins (that's also why a bad power supply often kills multiple chips at once). The voltage regulators are used as a cleaner supply for the VIC-II and the SID to minimize noise.

    • @retrobitstv
      @retrobitstv  11 месяцев назад +2

      Thank you for the feedback! I haven't yet had a 6510 fail in one of my own machines, but I've only worked on a small number of 64s up till now. Good to know; I didn't realize that about the regulators vs the PSU. I guess I'm going to have to study the schematics a bit more and brush up on the power supply side of things for next time!

  • @MitzaMaxwell
    @MitzaMaxwell 11 месяцев назад +5

    I've been told that the reason Commodore used sockets in a random order is because when some components were out of stock they used a socket and fitted the component later when it was back in stock.

    • @retrobitstv
      @retrobitstv  10 месяцев назад

      I hadn't heard that before but it makes perfect sense!

  • @00Skyfox
    @00Skyfox 10 месяцев назад +4

    If the 6510 can be replaced with a modified modern 6502, you should do a video walking through all the steps involved in that. It would be very informative and interesting.

    • @PlumGurly
      @PlumGurly 9 месяцев назад

      Yes, even if you only get 95% compatibility. It is a board that uses the 65C02 (or an older, original 6502) and intercepts the first 2 addresses on the bus. It's not quite how the 6510 did it, but it works.

  • @kirgahn
    @kirgahn 11 месяцев назад +2

    Not to turn down your high quality production videos, but love this format. Your delivery is really smooth, which makes it really easy to follow and enjoy the video.

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      Thank you for the feedback, I guess I will have to consider making more like this in the future :)

  • @buzman1985
    @buzman1985 5 месяцев назад +2

    More videos like this! I just got a membership because of this video.

    • @retrobitstv
      @retrobitstv  5 месяцев назад

      Glad you enjoyed it and welcome aboard!

  • @marcvincent1691
    @marcvincent1691 11 месяцев назад +3

    That was great ! Debugging tutorial videos are very helpful, thanks !

  • @8antipode9
    @8antipode9 11 месяцев назад +4

    I repair old machines myself (although not on YT) and I do enjoy watching others go through their troubleshooting process. Thanks!

    • @retrobitstv
      @retrobitstv  11 месяцев назад +2

      I'm still consider myself a novice at repairing these machines but I'm learning a bit more with each effort :)

    • @8antipode9
      @8antipode9 11 месяцев назад +3

      @@retrobitstv Yeah I consider myself a novice too, but I've definitely learned not to give up. At worst, put it aside and come back another time.

  • @rdh2059
    @rdh2059 7 месяцев назад +2

    Like many others, I went through a phase where I sort of became addicted to repairing Commodore C64s. Although I've had some 6510's fail, by a large margin, the issue is typically the PLA, MOS made logic chips or M/T RAM. Jan Beta sort of created the c64 term "future-proofing". It would be in that computer's best interests if all MOS logic chips (I saw 1 for sure) were removed. The other chip that fails quite often is unfortunately the precious SID. Your diagnosis approach is spot on and your soldering technique is very good. Good video and congrats on the repair!

  • @peteregan9750
    @peteregan9750 11 месяцев назад +2

    the informal style for repairs is great - nice to change things up a bit

  • @mikegage3326
    @mikegage3326 11 месяцев назад +4

    Nice repair video. Thanks for explaining the logic you used to troubleshoot the C64.

    • @Breakfast_of_Champions
      @Breakfast_of_Champions 11 месяцев назад

      It's a good introduction the general electronics fixing process on these simple machines.

  • @SpaceAce57201
    @SpaceAce57201 8 месяцев назад

    First video I have watched of yours. Love the format! ✌️

  • @michaelstoliker971
    @michaelstoliker971 11 месяцев назад +4

    What's a retro show without at least one dead C64? Just my luck I bought 2 and they both work!

    • @panopolis8051
      @panopolis8051 11 месяцев назад +1

      yeah, it's always a bit disappointing when you buy an "untested" old computer and it just works, half the fun is fixing them!

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      ...for the moment, at least. Give it some time 🤣

  • @networkg
    @networkg 11 месяцев назад +2

    An excellent video. A straight forward step by step approach to solving a problem. Your video is now bookmarked as a favorite. Something I am still hoping to find is a good video that shows every test point on a working C64 and the expected result (Oscilloscope screen, multimeter reading etc.)

    • @retrobitstv
      @retrobitstv  10 месяцев назад

      That would be a very useful resource. I'm not sure I've got the knowledge or equipment to gather all the correct information but certainly something I'll think about!

  • @crashoverride328
    @crashoverride328 8 месяцев назад

    Any time you are trying to desolder a large thermal mass low melt solder will b e your very good friend. The resultant alloy's low melting point simplifies the removal process a LOT.

  • @mogwaay
    @mogwaay 11 месяцев назад +1

    Hey Mat I couldn't make the live stream, which was a shame as I thought it sounded fun. I liked the casual repair here too, well done getting it working.

  • @SidebandSamurai
    @SidebandSamurai 10 месяцев назад +1

    Love the format. Keep it up

  • @brezel53
    @brezel53 10 месяцев назад +2

    Fantastic, more please!❤

  • @csico81
    @csico81 11 месяцев назад +2

    I really liked this video! Please do more like this.. Keep up the good work :) Greetings from Switzerland ;)

  • @jeffstack4217
    @jeffstack4217 11 месяцев назад +1

    in regards to the RF shield, I just generally 'push' on it with the tip of the soldering iron as the solder melts, it's a one step process. There's a finesse or learning curve to it, but once you get it, it's easy peasy. However, that's on units where that is to be salvaged, otherwise, just cut them off. ;)

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      I thought about trying that but I wasn't sure if it would damage the finish on the tip or not!

  • @BerniesBastelBude
    @BerniesBastelBude 11 месяцев назад +2

    impressive work!

  • @StrapMerf
    @StrapMerf 11 месяцев назад +1

    LM556 is a timer chip. it's a dual LM 555, used for clock and for reset line hold down(timed) I dont know what that particular 556 is used for though

    • @SeanChYT
      @SeanChYT 10 месяцев назад

      Commodore 64 machines usually only have one of those.

  • @TheStuffMade
    @TheStuffMade 7 месяцев назад

    Always good to see another breadbox brought back to life 👍. Spending $30+ on a new CPU is probably not worth it at this time, but who knows maybe someone will come up with a cheaper clock perfect replacement in the near future. I recently had to bite the bullet and spend $35 on a new VIC chip for my c128, I think it was worth it because it's back to fully working, but it's quite a lot of money.

  • @stevethepocket
    @stevethepocket 11 месяцев назад +2

    Was the sound cutting out during the diagnostic test something that happened with the recording? You didn't comment on it when it happened.

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      I was listening to the C64 audio at low volume through the laptop's built in speaker during the stream so I didn't hear the problem at the time. It does sound like an issue with the capture/encoding though - the glitch in question occurs during the volume register bug 'pop', but all the other pops sounded normal during the diag test and the SID music and game sounds all were fine too. I may go back and test the system out again later but it's already packed away for now.

  • @lolocloud9611
    @lolocloud9611 10 месяцев назад +1

    pretty cool stuff

  • @Charleshawn66
    @Charleshawn66 11 месяцев назад +1

    TY for the years of GREAT Commodore content! Where did you buy it that device that turns the power plug 90 degrees to the rear or did you 3D print its case and make it. I bought a new 3D printer (Anycubic Kobra 2 Pro) and really need to start using it! lol

    • @retrobitstv
      @retrobitstv  11 месяцев назад +1

      There are plans on the net for how to build your own, but I just bought this particular part: www.commodore-4ever.com/product-page/64-to-64-90-degree-adapter-commodore4ever

  • @tommyovesen
    @tommyovesen 11 месяцев назад +1

    Great video. Always nice to see a dead C64 come back to life!

  • @WizardNate
    @WizardNate 9 месяцев назад

    6:12 when you say to “cut them off”…how would you go about doing that?

    • @WizardNate
      @WizardNate 9 месяцев назад +1

      For those curious, I ended up using a small pair of End Cutting Pliers to gently pry the RF shield away from the board before applying more pressure to break the solder.
      Worked really well - didn’t need to heat up the solder at all and easily removed the shield in just a few minutes.

  • @gosammy1971
    @gosammy1971 11 месяцев назад +1

    Nice, i need my daily episode of a fixed c64

  • @coryengel
    @coryengel 11 месяцев назад +1

    Ditto. Love the unscripted repairs.

  • @gawkersdeathrattle1759
    @gawkersdeathrattle1759 11 месяцев назад +1

    @retrobits I'd love to do this, but I have no idea where one acquires a plethora of dead machinery upon which to practice and learn. In the words of a certain version of The Joker -- "Where does he get his WONDERFUL toys?"

    • @killr0y
      @killr0y 11 месяцев назад

      They were collected/purchased over the decades but with only basic troubleshooting tools didn't get very far. Best bet is to check local thrift stores, e-waste recyclers, Facebook marketplace, eBay, etc.

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      I see a lot of posts on Reddit where people have dug out an old C64 or recently bought one, it's dead, and they don't know how to fix it. You might try offering to help in one of the Commodore or C64 subs perhaps?

    • @gawkersdeathrattle1759
      @gawkersdeathrattle1759 11 месяцев назад +1

      @@retrobitstv Heh, I don't know if I could "offer help" so much as offer to educationally destroy everything until I learn how I can be helpful. :D
      Don't get me wrong, I'm familiar around electronics, but we're talking in some cases machines approaching 50 years old and have never been in better state than 'tempermental'. I don't know if I could bill myself as a positive force until I've dug into a few repairs.

  • @pwissink1
    @pwissink1 11 месяцев назад

    That power connector looks great. Where did you buy it?

    • @retrobitstv
      @retrobitstv  11 месяцев назад +1

      I purchased it a few months ago from this vendor: www.commodore-4ever.com/product-page/64-to-64-90-degree-adapter-commodore4ever

  • @terosaarela4555
    @terosaarela4555 11 месяцев назад +1

    Very nice and laid back video to follow! Have you looked into the J-CPU?

    • @retrobitstv
      @retrobitstv  11 месяцев назад +1

      I have now! Thanks for bringing that to my attention :)

  • @ASMRPoohbear
    @ASMRPoohbear 11 месяцев назад +1

    Love the repair video style. Music could be removed though

  • @MikesArcadeMonitorRepair
    @MikesArcadeMonitorRepair 10 месяцев назад

    Dang. I was sure it was a PLA given that it’s almost always the PLA or one of the MOS branded chips (if they are present) with a black screen. Sucks that’s it’s a CPU.

  • @w1katari
    @w1katari 11 месяцев назад

    i see many xf551.. its for sale one piece?

  • @grailknightofenoch1263
    @grailknightofenoch1263 11 месяцев назад +2

    love your vids

  • @fu1r4
    @fu1r4 11 месяцев назад +1

    5:25 You need a bigger tip. That small tip doesn't work!

  • @KlingonCaptain
    @KlingonCaptain 9 месяцев назад

    Why has it been impossible for me, over the years, to find a Commodore 64 in the wild when people on RUclips literally bins filled with them?

  • @tenminutetokyo2643
    @tenminutetokyo2643 11 месяцев назад

    Jam in new inductors. New modern ones are tiny.

  • @bobsbarnworkshop
    @bobsbarnworkshop 11 месяцев назад +1

    Hi Matt! How can I send you a couple “goodies”? Do you have a PO box?

    • @retrobitstv
      @retrobitstv  10 месяцев назад

      Hi Bob, please feel free to reach out to me at matt@retrobits.tv thanks!

  • @corygraves2402
    @corygraves2402 9 месяцев назад

    I opened up a commodore 64 bread bin and saw a ceramic gold 6510 and was wondering if anybody else has seen one

  • @Breakfast_of_Champions
    @Breakfast_of_Champions 11 месяцев назад +1

    Come on I've watched the whole stream and now you want me to watch and like this video too!😀

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      There are still more broken machines in the bin 🤣

  • @kevinklocke7796
    @kevinklocke7796 9 месяцев назад

    When you have no video, will you see the white line on a commodore monitor?

    • @retrobitstv
      @retrobitstv  9 месяцев назад

      It really depends on the monitor and the failure condition of the computer itself. If you can shrink the horizontal size enough or you have an underscan button on your display you should see the white line but on some monitors and TVs without the H-Size adjustment you won't. If the VIC-II isn't getting a clock signal and power and isn't generating a video signal, you won't see any line at all.

  • @dougjohnson4266
    @dougjohnson4266 10 месяцев назад +1

    .

    • @retrobitstv
      @retrobitstv  10 месяцев назад

      Thank you for your support!

  • @teejmiller
    @teejmiller 11 месяцев назад +2

    Clearly these machines came from someone mining bitcoin with the dead CPUs.

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      You jest but... github.com/ytmytm/c64-bitcoin-miner

  • @tetsujin_144
    @tetsujin_144 11 месяцев назад +1

    Machine seems to be a dorito or two short

    • @retrobitstv
      @retrobitstv  11 месяцев назад

      Still neato though :P

  • @ivang1014
    @ivang1014 9 месяцев назад

    *Promo SM* 😈

  • @icedearth2013
    @icedearth2013 5 месяцев назад +1

    nice video