https://kos-docs.dreamcast.wiki/topics.html
Oh, also these docs should be auto-generated every morning based on the latest code in the master branch.
Our docs have been something I have wanted to improve on since day 1 of joining the KOS team. We've done a decent job at adding good descriptions for all of the actual functions, but our organization of content was very poor and lacked higher-level descriptions. This took 4 straight days of my Christmas break to do, since I had to go through every header file in KOS, but I'm happy with the results. This is my Christmas present to the scene!

Anyway, going through, you might notice some topics have far more information and examples than others... Now that the top-level organization is complete, we will be slowly working to fill everything in with more detailed information like these: