Magia: GBA emulator written in golang. : golang
This is meant politely and helpfully: If you google "how to create a gameboy emulator", you will actually find a ton of resources on it, starting right from the beginning. I do not mean this as a "just google it", because I understand that it is reasonable to think you wouldn't find much. But the gameboy has kind of become the canonical "first real emulator" project, and as a result, there are more in-depth tutorials and documentation than you may expect.
Gameboy emulation has a very nice balance between understanding how emulation works, getting it going, being able to run real commercial games without having to implement every last little thing, not needing to worry too much about performance right away because even our cheapest computers or cell phones grotesquely outclass the power of a gameboy, and also having a nice place to say "I'm satisfied, I ran Tetris without audio" or something like that and having something you can show off to friends or potential employers without taking years of your life.
The tutorials will almost certainly not be in Go directly (a quick search didn't find one) but in this case following along with the C won't be that hard.
