• 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. M

    Macintosh Portable & Powerbook 100 power adapter bench

    Online, you can find a lot of discussions related to what power brick to use with Macintosh Portable (the original is M5136 7.5V 1.5A), if it has to be exactly 1.5A or can be more and if it’s worth recapping the power supplies. I decided to at least somehow help in those discussions with...
  2. M

    MacTwister: a MacCon/Etherport/Dayna Twisted Pair breakout board

    Hello, I would like to share my project that is long overdue for publishing here - MacTwister, a fairly universal Twisted Pair breakout board for a variety of SE and SE/30 network cards. It’s about the small PCB that you screw to the computer chassis that contains an external connector. I was...
  3. M

    Mac Portable battery charger tray

    I happen to own three Macintosh Portables and I was looking for a way to charge their batteries every now and then, without unpacking the computers from their safe storage. In short, I needed an external charger for Mac Portable batteries. Today, I would like to share my design of a 3d-printed...
  4. M

    SE PDS accelerators - how do they "halt" the onboard CPU?

    Hi, Just out of curiosity I was looking into how accelerators are designed for Macintosh SE. I know that some of them just plug into the socket instead of the original 68000 CPU and then the situation is clear. But what is exactly happening with PDS accelerators when the onboard CPU stays in...
  5. M

    Mac Portable M5126 doesn't boot after recap

    Hello, I've managed to return a tiny bit to my 68k Mac hobby and decided to try to clean up an unmolested backlit Portable I had lying in the closet. What I've done: Didn't try to turn it on, just disassembled it. Desoldered all capacitors. Most of the cap juice seemed fresh and still mostly...
  6. M

    Classic II FPU card design

    Hi everyone, I spent some hours of my lockdown time during Christmas and worked on a simple FPU card for Macintosh Classic II. I've bought this little Macintosh some years ago - it just needed a recap to bring it back to life :) Yesterday, I have assembled the FPU board and I'm happy to...
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