Last Updated: October 8, 2020.
Inside the Apple II by Stephen Edwards: Circuit-level details of how video is generated, the limited I/O devices. A complement to his assembly language presentation at VCF West 2020
CRT Repair by Ian Primus
Commodore Vic-20 Assembly Programming by Jeff Salzman
Note: these are technical classes. All of the classes are beginner/intermediate-level. All of them are classroom-style. They focus on vital tips and advice for configuring and repairing vintage hardware/software.