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  1. Important Information

    1. The 68kMLA Forum Rules   (11190 visits to this link)

      To quote vintage Apple manuals: "Read Me First!"

  2. Community Connections

    1. General 68kMLA News & Stuff

      What's going down in the barracks.

      4k
      posts

    2. Conquests

      Discuss your latest vintage Mac finds!

      40.3k
      posts

    3. Trading Post

      Feel free to trade all of your Mac goodies here with all honest intentions. The website provider assumes NO liability, so buyer beware! Please see this topic for more information.

      55.7k
      posts

  3. Projects & Hosted Forums

    1. RetroChallenge

      What can you do given only one month and strictly "retro" hardware? Find out with RetroChallenge!
      http://retrochallenge.org/

      1.5k
      posts

    2. 68kMLA Wiki

      The creation and maintenance of the 68kMLA's information repository.
      http://68kmla.org/wiki/

      558
      posts

  4. 68k Model Forums

    1. Compact Mac

      Macintosh, 512k, SE, etc.

      48.3k
      posts

    2. Mac II, Quadra & Centris

      Just think, having a Quadra 950 in 1992 would be like having a Mac Pro today… except with more slots, more expandability, and on-board SCSI!

      13.8k
      posts

    3. 68k LC & Performa

      Ah, the consumer computers!

      8.5k
      posts

    4. 68k PowerBook

      From the Portable to the 190cs.

      10.7k
      posts

  5. PowerPC Model Forums

    1. NuBus Power Mac, LC & Performa

      The NuBus architecture gets a new brain!

      2.8k
      posts

    2. PCI Power Mac & Performa

      The PPC comes of age and adopts the industry standard expansion slot.

      6.1k
      posts

    3. G3/G4/G5 Power Mac, iMac & eMac

      From the Beige G3 to the quad-core G5, via various iMacs!

      13.9k
      posts

    4. PPC PowerBook & iBook

      All that power in a laptop? Never…

      9.2k
      posts

  6. Everything Else…

    1. Apple I, ][, /// & Lisa

      Not really 68k Macs, but certainly Vintage!

      7.6k
      posts

    2. Newton

      The best PDA ever finally gets its own forum!

      1.1k
      posts

    3. Software

      Includes system stuff, productivity, emulation, design, and games for pre-OS X Macs!

      17.8k
      posts

    4. Hacks & Development

      Yes, it's back! Hardware hacks/modifications and software development for Mac OS.

      20.3k
      posts

    5. Peripherals

      Anything you can hook up to your Mac or stuff into it as an interface!

      15.2k
      posts

  • Recent Posts

    1. 0

      Mac SE Optocoupler ic specs needed

      Anyone out there with some experience with a SE psu? I suspect the ic in the photo is a 8dip optocoupler. one of my SE has it faulty. Would you guys know the specs for this ic?
      gkmaia in Compact Mac
    2. 52

      Macintosh Toolbox programming questions

      Yeah very early on Apple referred to sliders as “dials” but it never really stuck. Where did you see that last paragraph you quoted? I don’t see it in my copy of Inside Macintosh. Anyway it’s wrong - the only “dial” defined in ROM is the standard-issue scroll bar, I promise.
      Crutch in Hacks & Development
    3. 9

      Strange SE/30 Simasimac

      Unfortunately, I only have a multimeter to check these lines at the moment. I'll have to double-check the CPU-GLU address lines tomorrow to confirm that everything is working correctly, but no problems were detected on my first pass today.
      davidg5678 in Compact Mac
    4. 0

      128k makes clicking sound from speaker, no video or chime

      I just picked up a non-working 128k as a project. When I turn it on there is no chime or video, but there is a repeating clicking sound coming from the speaker. I'd say about 2 clicks per second. I'm assuming it's an analog board issue, but I don't know where to start looking. None of the capacitors are swollen that I can see with a quick look from above, I haven't pulled the analog board out yet to take a closer look. A reddit user said it could be a HV diode, I haven't taken a look at that yet to see if it is visibly damaged, I'll be doing that tomorrow. If anyone has ideas for trouble
      SamFortun in Compact Mac
    5. 9

      Strange SE/30 Simasimac

      I'm thinking this as well. Looks like only half of the VRAM is available to the main bus, but all of it is being displayed. A stuck VADR line into the muxes can result in portions of the display repeating, but that's not what you have here. I'd look closely at the lower A lines. Are you checking these with a scope or DMM? A continuity test won't tell you about a short to GND, etc.
      ymk in Compact Mac
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