Re: TI-84 calculator programs
Hehe, this stuff used to be the ♥♥♥♥ with my friends and me during high-school. I made an (unfinished) text adventure with another guy for it. Lots of other stuff too (programs displaying info relating to test subjects were pretty popular..).
Also played a lot of tetris, mario (the level editor was boss) and that kinda stuff on it.
The language is (some variant of) BASIC, if that's of any help. We kinda figured out how to use it as we went along, looking for stuff on the internet as needed. There's tutorials on it's specifics on some websites. I can't remember the forum I used to check for them though. I remember seeing threads on running programs at start up, but I don't know if or how this was accomplished.