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Less sane fork of: https://tinkerdifferent.com/threads/how-much-of-the-128k-512k-hardware-has-been-reverse-engineered.1630/ Mac Plus is the perfect platform for this insanity, who hasn't got one to spare? If you have two, but no spare, put 'em in a dark closet for a couple of months. :p How...

@jajan547 forgot to say thanks for the pics above. Have you got a Plus to post another pic for the series?

Yep, just found that a second ago, thanks. But looking to post the image of the logic board schematic for online reference here in thread for quick reference. ;)

Does anyone have the schematic at hand to upload here?

That's a new one on me? I've collected everything I could about the Duo System. IIRC, the tick of death involved replacing the guilty component with one of higher capacity, so testing what you have in there at present might not do the trick? Is it still ticking and not booting up?

There's a process I don't talk about on public forums to be used if I ever get around to doing an interstitial layer G3 adaptation for my 2300c that seems far better than castellation. It involves little spherical doodads pressed onto the adapter board in rows above each pad. It could be an...

Indeed, thanks for that correction. I was likely conflating two different approaches to DRAM expansion in a half awake state. On board SIMM in the Q605 was confuddled with the IIsi soldered DRAM examples got confuzzled. To further explain/confuse things: 1 - As Kai noted, the onboard VRAM would...

https://tinkerdifferent.com/threads/duodock-power-supply-issue-un-solved-agin.552/post-3241 edit: forgot to say welcome! 😴

ISTR there used to be howtos on how to fix the DuoDock PSU tick-of-death? Fixed mine that way ages and ages ago. Thinking it might have been a diode that failed? Falling asleep ATM, but maybe you can search something up about DuoDock PSU Repairs/Failures etc. out on the web?

Wow, lots of interest stirred up already! Does anyone remember if the developer released info on a memory upgrade card or was it a SCSI card over at the MLA?

Sure thing, comparison will be fun. Wondering how close we might get to 4MB Plus config starting out from original board design? 128K/512K upgrades are something I find fascinating. ISTR a memory upgrade developer releasing all over at the MLA at some point. It'll be interesting to see what a...

LOL! No monkey here, Ignatz runs loose in the lab and Crazy Cat on my shoulder dodges way too many bricks. 🥴

Thanks, no rush at all, heading off to work in a couple of hours. If you could take a few at lower resolutions as well that'll be better for templates in Illustrator. High res would be for reference material here in thread. Maybe post the pics in thumbnail mode with resolutions and...

Very nice starting point for the hobby. They look sweet indeed. When were you planning to have the monkey fitted to your back?

Nice, thanks for the info on that. @Kai Robinson what's the story on SWIM? How different is it from IWM and might it be dropped in as a replacement if nobody takes on the IWM challenge? Does anyone have really high res pics of the 128K board to upload here? I'd like to set up the flow of the...

SWIM is a superset of IWM or 100% incompatible? If the former, might make for some great playtime. Will the 128K boot from 512Ke ROM?

Absolutely, you beat me to post time while I was ordering one. ;)

On the way, thanks! Definitely going to be integrated into the SE fan config test setup . . . if and when. :oops:

HRMMM . . . I wonder if it was eudi?

Current Project: now in testing/refinement phase: Ergonomics/Pain Abatement Simple, three frame flipbook animation turned out nicely. Great chair had no arms/great arms in stock from dead chair. Adaptation fun! Base canted, so lever in front/other side didn't...