Bumbershoot is a great blog if you are a 1980s home computer/console enjoyer, but were never quite sure how it all worked. He is trying to figure this out himself, so he goes step-by-step through getting his games working on a particular system.

So there are a lot of ASM 'deep dives' like this entry (which probably won't get too much traction.) My one complaint is he has a lot of content, but the blog is hard to navigate.