• Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out this follow-up post about our outage a week or so ago.

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  1. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    Oh dear, that is a conundrum, and I do deeply respect your foundational instinct to "do no harm". I come from a line of archivists and librarians so it's something I deeply understand. My thought on this is though: If the work you are doing is fed back in to the community and builds a love and...
  2. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    My brilliant friend @Andy discovered a satisfyingly technical and ancient answer to my questions regarding PAL SIMMs, and the background, as outlined in the PDF attached! Then of course I found THE DEFINITIVE 68kMLA thread on the subject. Just looping it in here for reference. Of course it was...
  3. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    On another topic, despite extensive research I'm having a hard time nailing down specifics on the RAM capabilities of the STOCK Macintosh II. I know about the 24/32bit addressing. I know about the HMMU, but beyond that things get murky. I found THIS THREAD that tries to take a whack at it, but...
  4. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    Well, the audio still isn't working. One thing I didn't do was pull the socketed QFPs (like the sound chip) and check under the socket or clean the contacts... There's something afoot, but I am feeling quite satisfied overall. This is the first time I've undertaken this much rework on a single...
  5. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    Hello All, So, I figured I'd post an update. I ordered and received my capacitor repair kits and pulled the board and gave it a good look-over. I dusted it, cleaned it with iso and pulled all the bad SMD electrolytics via the twisting method. It was very quick and smooth and incurred no...
  6. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    I knoooooow... I got totally screwed by having a lucky snag 😋 You're all starting to turn me to your way of thinking...I just hope all my cap rework does the job and they both give me a chime. And no, I haven't tried powering them up. Not gonna be impatient (he grumbles to himself under his breath)
  7. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    As per @Unknown_K 's request here's the IIfx card set... There's something fishy. One of these cards doesn't fit in the Macintosh II... Now I'm wondering. I have a PowerMac 8100/80 that I'm pretty sure I got from the same client. It might be that they upgraded in to that when they got the "Janus...
  8. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    These are all great thoughts. My laser cutter is only 500x300mm, so I might have to make some phone calls. Does anyone have any drawings for Macintosh II dimensions or will this be from scratch... 🤔 I've attached a board shot of the "new" Macintosh II along with pictures from the eBay listing...
  9. skeptechsguide

    TFT/LCD Monitors that sync-up with TOBI-Card (Nubus 256colors)

    Hi Doc, does your Tobi card have the memory expansion? If so then it can do 640x480 67Hz @256 Colors. That's a standard sync that most modern monitors will do (VGA clock + 6.66KHz). That "emulates" the Macintosh 13" "High Resolution Monitor" the DIP settings on different 15 pin Mac to VGA...
  10. skeptechsguide

    A connundrum: Super clean original Macintosh II... keep it stock or swap in MEGA IIfx upgrade

    Hello Everyone, I've been lurking a bit. Your perspectives are greatly respected and appreciated. So: I've been a vintage collector (read, borderline hoarder with a vague curatorial philosophy) for years. I've been lucky enough to come across lots of great finds and not have to put too big...
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