CelGen said:

I'm looking at the photos and it really doesn't look like you need the board at all. Simply bending four pins up and soldering wires from point to point will do the exact same purpose so the 512K mod is still possible. You just need to be good with an iron.

Now mind you I can't look at the actual layout files and confirm this because he's using formats that Eagle can't make any sense of. Fffs.

Click to expand...

He's using OsmondPCB for the layout.  He gives a link to the software which is a free download so you can view the files.  Osmond is the only Mac PCB layout software of which I am aware, and there are PPC and Classic versions available.

His hack using the .print driver was interesting, but I wonder if he is aware of the ROM hook that Charlie told us about some years ago.  Older fellow who dropped in for a few months or years a while back.  He did some cool work on animating gif presentations on early Macs, I think.  I can't remember his exact handle.  Maybe it was Charles with a 3 instead of an e?