Apple II Source Listings

[mmphosis]

https://6502disassembly.com/other-a2.html

[stevesimmons]

Linked from that page is this very nice description of how the Apple 2 disk operating system was written. In 7 weeks, on punch cards and paper tape!

https://computerhistory.org/blog/apple-ii-dos-source-code/

[thristian]

Today I learned that, like Windows NT, the first version of Apple DOS was numbered 3.1.

[orionblastar]

Steve Wozniak did DOS 3.3 for the Apple // and the SOS for the Apple ///. He open-sourced a lot of his work for others to learn from.