AppleNet was a networking infrastructure made by Apple in the early 1980s. It was never put into production. More information:
- http://bitsavers.informatik.uni-stuttgart.de/pdf/apple/lisa/appleNet/
- https://en.wikipedia.org/wiki/AppleTalk#AppleNet
- https://books.google.com/books?id=-C8EAAAAMBAJ&lpg=PA14&ots=XqaEJnNOLj&pg=PA14
After buying an AppleNet adaptor card that fits into the expansion port of an Apple Lisa, I attempted to derive a schematic by "beeping out" the circuit board: that is, finding connections between all of the components with a multimeter. This repository contains the result.
This is the most complicated schematic I have ever made, and I don't think I did a very nice job. There is an art to laying out a schematic that's easy to follow, and I have not mastered it.
Additionally, I'm a computer scientist, not an EE. There is much I don't understand about electronics or schematic diagrams---I'm more likely to make omissions or errors than a trained professional, and I probably didn't use some conventions that most schematics follow.
Expect mistakes.
(But I do know what bypass capacitors are.)
This schematic is released into the public domain. Nobody owns it.
-- Tom Stepleton, 25 November 2018, Jersey City