This site is a really comprehensive resource on gba and ds: http://problemkaputt.de/. Source: over 1 year ago

He has probably deleted that, well go to https://problemkaputt.de and redownload it. Source: almost 2 years ago

Nocash is responsible for a number of different emulators over the years, most of which include powerful debuggers. They've been quite useful for a lot of emudevs here (myself included). Source: almost 2 years ago

For documentation, Gameboy programmers seem to recommend "pandocs" and nocash tends to include excellent hardware documentation with his line of emulators (though apparently the gameboy emulator isn't as accurate as it could be). Source: over 2 years ago

Http://problemkaputt.de/ has a lot of docs for different consoles. Source: over 3 years ago

In addition to the other reply you can use an emulator on your computer: https://fceux.com/web/home.html. Source: over 2 years ago

When it comes down to it I do think the emulation scene is mostly about games, and the Apple II was not a very good game machine due to its barely adequate sound and weird color. Have you used FCEUX? Now there's a serious reverse engineering emulator effort, and it's no accident that it's for the NES. Source: over 2 years ago

They probably meant: https://fceux.com/web/home.html. Source: over 2 years ago