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Hello everyone I have an LC475 motherboard I purchased from Europe the Board has the distinct EURO after the serial number on the board. I bring this up because I am in the US and am having some doubts about things. For starters I have installed a working known good CPU, I have cleaned the...

I don’t mind, no worries I am looking for units outside of the USA, so if you have an extra let me know.

Probably can, it’s just you have to pry plastic and it gets a bit scary there but I’ll give it a shot tonight.

Would be wonderful, thank you.

Actually don't need an analog board I think.

Either the chip will be an MX1000QC-12 or a AM27C512 you will need to dissassemble the rom pack (just unclips or pops apart) from here you need a 32 pin PLCC adapter and a tl866 (link here). Once the ROM pack is open pop out that chip that is socketed it will be the ROM.

THose are prototype ROMs and they are pretty much the same as the released ones, mind uploading them?

Use a RGBtoHDMI, make sure you have a pi Zero. Next is a matter of finding a screen that fits so in this case I believe this would work. What you will be doing is taping into the video signal in the analog board to feed a video signal to the RGBtoHDMI, from here its as simple as plugging in the...

Here are photos of the Port Pack

I also forgot to take apart the port pack I’ll do all of this later tonight.

Also was wrong about the 68882, I’ll have to take it apart again and see what’s actually under the yellow.

Yes the FPU is the yellow labeled chip. I might be able to do a ROM dump.

Okay so here's something interesting, I disassembled the TechStep and have taken photos. From what you can see there are no SMD electrolytic capacitors ,they are all tantalums stock from Apple. Also fun fact the TechStep has a FPU it is a Motorola 68882. Something else I want to point out is...

PM me let's design one.

Wonderful, strange Apple stopped sometime in 1993 with support would be my guess.

Love this, thanks for the link.

These ROMs match the same computers covered in the ROMs I have here, correct?

Probably not too terribly difficult, might have custom chips though, I can take mine apart and see.

Do you happen to have photos and also what ROMs were included?

Thank you I really appreciate it, everyone has worked hard on this. I wanted to win a prototype to see what all is different on the prototype ROM's and units but I imagine very little change except for maybe the devices name which was originally the TechTool before being replaced with TechStep...