After a whole lot of work, my open-source I/O board replica is finally done! I'm pretty happy with how it turned out; it should be pretty much identical to the original other than the routing of traces. It's by far the most expensive board that I've designed, but it's still only around $250 for the board and all of the required parts, so not too bad. If you want to reuse some chips from your old board, the total cost is closer to $150, which is pretty awesome! You can find the Gerbers and more information about the board in
this GitHub repository as well as the other Lisa boards that I've made. This took a really long time to design, so hopefully it's helpful to a lot of people who have corroded I/O boards!
