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I'm also interested in 2 or 3 of these; I'm in the England (Bucks) and Wales (Powys) :-) -- oh, and I can do SMT soldering, if you are considering a kit.

You can easily create a 'top header' as a precompiled header with whatever you like to define in there... This will be "included" in every file you compile.

You should check PiStorm. Desolder the 68k, install PiStorm and you get software running the Mac instead. Right now it's pretty early stage, but it boots. I've socketed the 68k on a mac SE here, and plan to hack away at that project for a little while...

Thanks for checking your stocks @mg.man -- I DID manage to fix the broken key switch. Still have intermittent problem with quite a few other keys, even with deox. I think I'll let it 'rest' a bit as I might have overdosed the keyboard with deox :)

Yes I used continuity after removing the switch. I managed to fix one of them too, somehow bending the little blade 'just so' made it work, while no amount of contact fluid seemed to help. However the keyboard is in very good cosmetic shape, but quite a few keys are hit/miss somehow, I wonder if...

Here goes. The one on the left works, but it's gray tabs are broken. I can/will put a drop of superglue on it, as I don't think I plan to disassemble it again anyway. The one that is disassembled is mechanically fine, BUT doesn't work, can't seem to find out why...

I've got 2 broken switches. Well one is not physically broken, but won't work (looks very clean inside, but no contacts somehow). The other one is definitely broken, but not the stem, the gray 'chassis' instead. I've googled a bit and it seems the only possible replacements are in the US, which...

LOL I had noticed, and told myself "wow, it looked horrible back then, that hasn't changed a bit!" :)

Nice still, did you use a bench PSU or some other one?

Does anyone know if the logic board connector (male part) is easily available? I'm thinking of using the mobo with a RGB2HDMI and a +5V supply just by itself... AFAIK I don't need any 12V for the logic board (?)

I don't know if this help, or not, but I wrote a replacement to Synergy a few years ago. Didn't try to replace it /all/ just make something lighweight that worked between my mac and linux box. I haven't used it in a while now as I converted to Linux for the desktop these days, but I used it for...

I'm definitely interested by a handful of these, when available. Would be great if some came with short run of cable and a male mini-din, kinda like the original adapters!

@quorten well done. One thing you can so is run the AVR from the built in oscillator (8Mhz down to 256khz if I remember), much, MUCH quicker than 32k -- you can still use the 32k crystal as timing reference for one of the timer so it stays accurate, but will have a lot more cycles to do the rest.

Thanks @Kai Robinson, received my wall art :-)

Cool, with simavr you can trace the exact time the interrupt is /raised/, so you can see what the delta raise vs pin toggle occurs. Altho, in your interrupt handler for the pin toggle, perhaps you shoudl re-enable the interrupt JUST after the toggle (in fact, you can do it on the /previous/...

@Kai Robinson I couldn't find the RTC chip on the schematic. Do you think the 65C22 has internal pullups? @quorten I noticed you enable/disable interrupt in various places in the firmware, in some place I don't think it's actually necessary to do so (when reconfiguring ports for example) --...

Couple of question here: is there a pullup resistor on the board for the data line? If so, you probably should not /drive/ the pin as an output, but configure it as open drain, this is pretty much to ensure both end are not driving the pin at the same time (which would damage both drivers)...

Right, I've added a bit of sponsorship to @Kai Robinson for my wall-board, if anyone else feel like helping, remember you would be hard pressed to find something you would hang on your wall for less than  £30 :-) Also, on a side topic regarding the attiny85 RTC chip, I'm the author of...

Actually I'd like to do the same, ie buy a dead board to support this awesome project :-) Also in the UK, PM if if suitable.

Thanks for the tip. I had a poke around; probe on the ground pins at the connector, and measured resistance at the + of all the SMT caps, radialy.  And yes /most/ of the board reads about 16 ohms -- give or take -- , but around the 74hcs I have replaced, it reads 3ohms on the VCC... I removed...