Ben Eater has a number of very informative videos on Wozmon on YouTube - what it is, how it works and and getting it to work on a home built 6502 machine, literally stepping through the assembly:

Running Apple 1 software on a breadboard computer (Wozmon) https://www.youtube.com/watch?v=HlLCtjJzHVI

How Wozniak’s code for the Apple 1 works: https://www.youtube.com/watch?v=SpG8rgI7Hec

Adapting WozMon for the breadboard 6502 https://www.youtube.com/watch?v=7M8LvMtdcgY