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Reverse Engineering the Macintosh Plus PCB

volvo242gt

Well-known member
That's just because the floppy drive is not hooked up, for some reason the icon doesn't flash on the plus without a drive present
I think mine (the former tafkar Mac Plus) does... I'll check later today. It currently is driveless.

Another idea for a future revision would be to hack in the necessary code and to swap a SWIM chip for the IWM chip to provide Superdrive capabilities to the Plus board.
 

max1zzz

Well-known member
Board layout, gerbers and scans are now on GitHub:

As with my other designs these are provided under a non-commercial licence but if you are a repairer and want to offer transplant services (or have any other commercial use in mind) please contact me

BOM will be added soon, It needs a little cleaning up first

I haven't updated the ROMinated board as I still need to get around to testing it....
 

Iesca

Well-known member
Now that the board is reversed-engineered, would it be difficult for someone to make a new version of the schematics? Given that the ones currently floating around out there for the Plus are very low quality and hard to read.
 

max1zzz

Well-known member
Now that the board is reversed-engineered, would it be difficult for someone to make a new version of the schematics? Given that the ones currently floating around out there for the Plus are very low quality and hard to read.
That is actually something that is on my list of things to do :)
Unfortunately that list is very long so if someone else want to have a crack at it please be my guest!
 

Jockelill

Well-known member
Fantastic work @max1zzz !! I recently started the task for making a new analogue board for the Plus, so first step was to remove all components and get a good scan. So here you go if anyone else wants to try it before I finish. I've also scanned the plastic cover. I also noticed the the scanner cut a tiny bit of the component side, I'll correct that when I'm back in office in early March.
 

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