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  1. J

    CayMac LC Style Mean Well PSU Replacement

    Great feedback! Very interesting with that drive, I figure it's an inrush current phenomena, might be possible to add a power resistor to ease that up a little bit. There are of course also a 15W and 20W model of the IRMs for 12V, but they are slightly bigger in size. When dimensioning these...
  2. J

    Making a replacement Hinge for a 15" Studio Display

    Stumbled upon this thread and wanted to add the files for the 17" display. I made these a bit more than 3 years ago, but if anyone needs them they are here. Mine are also with threaded holes, but you will still need to put a tap through them to clear it out. And I also had same experience with...
  3. J

    MacEffects Clear SE & SE/30 Cases Now Available!

    How big was the first run?
  4. J

    Check if Centris 650 has a fpu or not

    So, I found the issue. It's more of a "feature" than actual bug. I had added support for large (128MB) simms by doing: The change to the RAM sizing code is: A0168 223C 0000 0100 Move.L #$100, D1 Changing that to: A0168 223C 0000 0000 Move.L #0, D1 As per Rob...
  5. J

    Check if Centris 650 has a fpu or not

    Can you also take a picture of the ROM in the machine with the power on? There are a few LED that give a lot of information.
  6. J

    Check if Centris 650 has a fpu or not

    Does it chime with the hacked ROM? Are you getting picture? I've been running this ROM in my Q650 for a long time, but not sure if the Centris has like a different gestalt ID or so.
  7. J

    #Marchintosh 2025 - RGB 900

    Thank you 😌! The only things so far is raising the clock speed to 33Mhz, PDS FPGA, 256MB RAM and that 16MB ROM, the Q900 can do around 37Mhz maximum, but I’m missing a crystal for that. Also not sure my FPGA will like that, but only one way to find out. I know the FPGA breaks up when you...
  8. J

    #Marchintosh 2025 - RGB 900

    These are the stock ratings. Most PSUs today have a weaker 3.3V and 5V (around 20A) and a very strong 12V. Typically the -12V is 0.3A
  9. J

    #Marchintosh 2025 - RGB 900

    Thank you :), yeah, I’m running the fans at 40% min and they are very quiet. This case is basically open in the lower part (just a mesh), so makes sense to have speaker that way (also a mesh underneath it) :) power supply is also in the lower section and 550V, it’s a bit low on -12V and 5V...
  10. J

    #Marchintosh 2025 - RGB 900

    Here is a short description of my own project for #Marchintosh 2025 that is nearing completion. An RGB 900 :) . But first a short background, I have several Quadra 900 logic boards that I have been thinking about what to do with(besides the obvious – playing with them on my bench). Since long...
  11. J

    Mystic Died. Looking for an MC88916DW80 chip.

    Do you have a SCSI2SD v6? I’ve found that it emulates a mechanical drive better than the BlueScsi. As you know I have issues with rom disk driver and mechanical drives, but it works with BlueScsi (and Zuluscsi, but they use same principle and hardware). I guess the mechanical drives and scsi2sd...
  12. J

    Quadra PDS connector source?

    I can confirm that the connector from Quest Comp works fine and that the company does deliver :).
  13. J

    Apple Interactive Television Box (STB) Prototype Adventures

    Someone at Apple is definitely reading :). The schematics for the stb was released yesterday: https://68kmla.org/bb/index.php?threads/apple-interactive-tv-box.716/page-4#post-501810
  14. J

    Apple Interactive Television Box (STB) Prototype Adventures

    I've played a bit more with the unit here. Since it's essentially an LC475 with added video circutry I've experimented with a patched LC475 8MB ROM with added ROM disk driver and OS (my LC475 patched ROM has both ROM and RAM disk driver). It will boot, but not display video (and I know others...
  15. J

    Apple Interactive Television Box (STB) Prototype Adventures

    Here is the system extracted from the ROM, I believe it's slightly different than previous red ROM, this one contains "swedish keyboard" for instance.
  16. J

    Apple Interactive Television Box (STB) Prototype Adventures

    I also have a "telia unit" here that I got only a few days ago, it belongs to my dear friend @jajan547 who lets me play with it for while before sending to him :). The RAM test is at least located at A191C, 7000 72FF 2448 If you change that to 4ED6 72FF 2448 it will no longer test the ram (if...
  17. J

    Special RED Macintosh Plus Apple Events Developer Association

    Another amazing find :)! Great job Jake!!
  18. J

    PRAM replacement on later Powerbook G4?

    On the G3 Lombard it’s a similar solution, but with 6 in series. Bad thing is that you have to take the whole computer apart…
  19. J

    Mac OS 7.7a2 (Pre-release) archived on the garden

    Did anyone get it to work on a 68k machine? I tried both on IIci with Carrera040 and LC475 but without success. It starts to boot but crashes into a prompt.
  20. J

    Anyone Else Have an Apple C.A.T. (TechStep Precurosr)?

    I examined the cards quite extensively when I had the set here, and the little card is basically just a few connectors on a simple two layer card, the cables are fairly standard or at least with still available connectors. The Nubus card is a bit trickier of course, but it’s basically just a lot...