68kMLA Classic Interface

@jmacz and I have been discussing various ATX power supply options for Mac II series computers, and the challenges of 5V and 12V regulation. We're hoping to fit the ATX guts inside the original Mac PSU's enclosure so that it looks stock. For most Macs (we're looking at the IIci, IIcx, and IIfx...

Hello, Introduction : This is a quick guide on how I upgraded the PSU on my Performa 6200. This guide applies to all macs which share the same case (Quadra/LC/Performa 630, Performa/PowerMac 62XX/63XX) PowerSupplys inside this case are an afterthought. They are badly designed and the first...

Hello all, I recently pulled an old Beige G3 Minitower out of the basement to try to get it up and running again. After dusting it off I powered it up and out popped a non-bootable floppy that I guess had been left in it, and then it booted up into OS9.2 just long enough to give a few errors...

Hey all, just wanted to gauge community interest to see if anyone would be interested in an ATX to Mac 10-pin adapter board. I've got a IIsi with a dead power supply (surface mount caps got REALLY bad inside) and @Compgeke and I have been working on an adapter board that'll take any ATX power...

A friend designed an adapter for converting ATX to connect to a IIcx, IIci, IIsi, Q700, C/Q650, IIvx, IIvi, P600, Q800 and 7100. Handy for bench testing, and with a little work on mounting, may help with replacing PSUs. He has shared the design. You're free to make some for yourself. I've...

Hey all, just wanted to gauge community interest to see if anyone would be interested in an ATX to Mac 10-pin adapter board. I've got a IIsi with a dead power supply (surface mount caps got REALLY bad inside) and @Compgeke and I have been working on an adapter board that'll take any ATX power...

Hi all! There's some really cool stuff going on in this forum with power supply conversions to use an ATX PSU to replace a failing vintage Mac PSU. I'm curious if anyone has made a nice adapter board for the Quadra 840av power supply? There's lots of good information in this thread to start...

I made another of these dumb things because I'm frankly tired of the current janky harness I'm using. Find it at https://github.com/GeorgeRudolf/PMacATX I suggest you people combine orders since MOQ is 5 boards, and they can cheaply assemble the SMD bits. This has not been designed to fit...

Ladies and Gentlemen, Today, I would like to talk about the rapidly decreasing population of working Quadra 9x0 (900 and 950) specimens. If no action is taken within the next 5 or 10 years, the entire specie will soon disappear. Although the exact cause of death is still unknown, most...

I am starting to think about converting my Sawtooth to run from an ATX PSU. The original Astec PSU still works OK but its 23 years old and probably getting toward the end of its life now. The challenge as I see it is how to achieve a neat/OEM look, in terms of: no case modification, retaining...

So I'll start out by saying I don't actually have a question. Just put a lot of effort into finding ATX PSUs with high amp 5V rails, and figured I'd share my findings. That said, any additions to the list would be highly appreciated. My motivation wasn't to replace a dead PSU, rather, to free...

Good afternoon! So I have taken a hiatus from my vintage machines for about 1/2 a year. I decided to fire up the old machines last night in preparation for the two newest members (soon to be) of the family--a Commodore Amiga and an Atari Lynx console. When I plugged up my Performa 6360, it...

Hello altogether, this is my first post on this wonderful forum and I would like to use the opportunity to say a big Thank You to all members sharing their insights into classic Macs. I was wondering the other day what you guys think about an ATX mainboard, created based on @Bolle's recreated...

After a year or so with on and off research I was finally able to bring my precious Quadra 950 back to life. Thank you Geekdot

Hello again, I have just picked up a dead MDD Dual 1.25 2003 (bootable OS9, FireWire 400, etc) that I would like to get working. I am assuming the power supply is dead, as other components I have tested seem to be working fine. I was wondering if it is possible to repair the original power...