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This would no doubt be popular with the Apple II crowd - but hey, model airplane paint is cheap.

Snow White, all day every day.  I like the idea of cutting the grooves all the way through, as that would give you some glimpses of the internals. Though maybe they just need to be a little deeper?  You might want to consider scaling down the spacing and width of the grooves too, to match the...

I'm not convinced there is a motherboard of any kind in there.  To me this looks like a space saving display + drives in a box to sit on top of an Apple-II series.

If I was looking for a new one now, I'd get one with a data output (RS232 or USB) for logging measurements over time.

I'm confused by your question.  Perhaps we are having language difficulties? No, there is no "standard" Mac to Pi cable, just as Mac serial ports are not "standard", but we are accustomed to having to find or make adapters for them.  My point was that a USB-RS232 converter is a lot easier to...

Don't see why not.  G4 ZIF upgrades were available for G3 Beige and B&W machines back in the day.  If the parts are the same layout, you'd remove the G3 IC from the ZIF module and drop a G4 in its place.

Deleted the duplicate.  Moving this to Conquests.

Possibly the most flexible thing to do would be to bring out all unused / available pins to a standard header (SO-DIMM?) with a documented pinout, and let future devs run wild with whatever they can use there. Or all the STMs pins?  Excellent thought :)

So, call me crazy, but would the Mac itself be up to the task of uploading config data, via an INIT, CDEV or application?  bigmessofwires has something similar working on one of his replacement ROM products.

Is there a pin-compatible part in production now that you could use for prototyping? That's encouraging. Pardon me for not digging up the exact link, but I gathered from bbraun's work that this series of micros have a PRU-like semi-independent fast IO subsystem that can bit-bang at ~100MHz or...

Pinned post in Hacks & Development: Networking a classic Mac via serial port -> OS X /unix /Linux -> internet This uses a USB-serial adapter, but a TTL-RS232 off the Pi's GPIO should be approximately similar.

For future reference, the Power Colo(u)r Classic site, and, as far as I can tell, most things linked off of it, are mirrored at Applefritter.

It could also be worth trying the drivers for commercial G4 CPU upgrades from back in the day - it's my impression that they tend to work across different models & brands of upgrades, and their main function is to activate the cache on startup (other functions like software control of...

Seems like the kind of replacement item that would be far cheaper to have CNC-cut (laser or waterjet) from a flat sheet rather than 3D printed.  The end purchaser could file or sand down the edges for an authentic looking chamfer if they wanted.

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I would suggest simply running the internal floppy connector out to an identical case-mounted socket, and using a bare internal drive as an external.

I have a hunch that even this part of your project by itself will prove useful for people wanting to develop other kinds of expansion cards.

Sidenote: it seems to me that modularizing is going to also make developing and (perhaps more importantly) debugging much less of a headache for you - in that once one module (the accelerator) is known to be functional, any problems that crop up in adapting to second or third machines can be...

IMO, absolutely.  Anything that brings the end cost to the purchaser down is going to expand your market.  Having a powerful but optional upgrade for later on only makes it more attractive - and, obviously, the larger the potential market, the better the chance of economies of scale.  The speed...

.... by using the serial port.