I Hate Math (Co-Processors) - Macintosh SE/30 Board Repair - Part 2

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  • เผยแพร่เมื่อ 19 พ.ย. 2024

ความคิดเห็น • 35

  • @trainingtheworld5093
    @trainingtheworld5093 3 ปีที่แล้ว

    I've owned a few of these machines and always found them to be quite robust. Every other compact mac I've come across has required major restoration with power supply or logicboard failures. I admire your dedication in tracing all those signals from the Math co-processor.

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว

      Thanks! I have some more coming up, so stay tuned!

  • @ARCJavMaster
    @ARCJavMaster 3 ปีที่แล้ว +1

    Just in time to troubleshoot mine, great work!!

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว +1

      Send It and I'll Mend It! ™

    • @SatanicMac
      @SatanicMac 3 ปีที่แล้ว

      @@JoesComputerMuseum The perfect Trade Mark!

  • @geekwithsocialskills
    @geekwithsocialskills 3 ปีที่แล้ว +1

    Nicely done. When doing SMD work, I use a lot of Kapton tape. I noticed you used a little bit on your FPU replacement. Also, IMHO anything over 32 MB of RAM on a SE/30 is overkill, however it is pretty cool to do it for the wow factor :-)

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว +2

      Thanks! Yeah, I didn't use enough kapton, that's for sure. And I maxed out the RAM just to see if I could do it.

  • @lemonherb1
    @lemonherb1 3 ปีที่แล้ว +1

    I hadn't noticed that the CPU was socketed. I think most of them were surface mounted, so it defiantly was worth trying to save this one. I believe you can install a faster CPU in the socketed boards

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว

      Yup, most SE/30's I've seen as late are soldered. Faster CPU you say? Hmmm...

    • @lemonherb1
      @lemonherb1 3 ปีที่แล้ว

      I seem to remember reading something about that years ago, but since mine is soldered on, I didn't investigate further

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว

      @@lemonherb1 I just did some quick research: indicates not possible because of a shared system oscillator. Requires accelerator card with cached bus access.

    • @lemonherb1
      @lemonherb1 3 ปีที่แล้ว

      Ah, I see. That makes sense. Kinda like the TWGS for the IIGS then. I'm assuming these accelerator cards are ridiculously expensive on the secondary market then?

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว

      @@lemonherb1 Apparently, there's still a company you can buy them from, new, for like $200 US?

  • @macobyte
    @macobyte 3 ปีที่แล้ว

    Great video. I’m having my own SE/30 recapped and repaired later this month and adding a Rominator II and a SCSI2SD for good measure.
    I’m sure it’s elementary to you, but would you please share any guidance you may have around how to add the connection for the SE/30’s hard drive activity light to your SCSI2SD? This would definitely be something I’d be interested in doing to my own SCSI2SD.

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว +1

      It's pretty basic. In my case, I'm using the SCSI2SD 6.0, and other boards may not have the right breakout to attach an LED. You remove the board from the holder, and solder in a 0.1 inch spaced pin header where it is labeled "LED" on the board. Then, you just unplug the LED from the old hard drive, and connect it to the SCSI2SD. (If it doesn't light up, you have it plugged in backwards. It won't break anything, the light just won't work) In my case, the LED was permanently attached to the hard drive caddy, so it stayed in the caddy when I removed the hard drive. You can adapt this for situations where there is no LED, that is, you can run some long leads to the LED of your choice of color, then hot glue/epoxy/superglue the LED into the front bezel.

    • @macobyte
      @macobyte 3 ปีที่แล้ว

      @@JoesComputerMuseum Thanks for the reply! Sounds simple enough.

  • @tomlindo2863
    @tomlindo2863 3 ปีที่แล้ว

    I wonder with this failure mode, if you plugged in an accelerator card with external fpu, would it have booted normally as it would reference the fpu on the add on card.

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว

      I wonder the same thing. I ordered a card, but it's taking it's sweet time to get here and I had a video to finish. It's a good follow up test, however.

  • @rjpeterson1
    @rjpeterson1 3 ปีที่แล้ว

    Joe where could I get a copy of those schematics for the SE30?

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว +1

      museo.freaknet.org/gallery/apple/stuff/mac/andreas.kann/schemat.html

    • @rjpeterson1
      @rjpeterson1 3 ปีที่แล้ว

      Thanks Joe

  • @TheSulross
    @TheSulross 3 ปีที่แล้ว

    or "a MC68K is all the CPU you need" - my all time fav CPU

    • @roningordon2955
      @roningordon2955 3 ปีที่แล้ว

      Pro tip : watch series at flixzone. Been using it for watching a lot of movies these days.

    • @daytonalvaro258
      @daytonalvaro258 3 ปีที่แล้ว

      @Ronin Gordon Definitely, been watching on Flixzone} for months myself :D

  • @JonathanKarras
    @JonathanKarras 3 ปีที่แล้ว

    Next time get some PLCC68 sockets and use that in place of soldering the co-processor or CPU back on directly. Also, SMT removal alloy is your friend when removing SMD chips like this. Makes it a breeze.

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว

      I had a socket. But at the time, I didn't have the proper tools to reflow it into place. And on the alloy - agreed!!

    • @JonathanKarras
      @JonathanKarras 3 ปีที่แล้ว

      @@JoesComputerMuseum The trick I saw somewhere is to pop out the bottom then you can just solder in with your pencil. I believe the PACE instructional videos show it that way.

    • @JoesComputerMuseum
      @JoesComputerMuseum  3 ปีที่แล้ว

      @@JonathanKarras That is BRILLIANT

  • @piratestation69
    @piratestation69 3 ปีที่แล้ว

    I still say they are paper weights... but they are a part of history...

  • @Irilia_neko
    @Irilia_neko 3 ปีที่แล้ว

    Don't have a crt on my phone xD