While not NES, one of my students at General Assembly made a Chip-8 emulator/interpreter in JavaScript for their final project.
Chip-8 has 30-something instructions and is relatively simple to implement, and test driving it is pretty easy too. I thought it was a really wonderful first emulation exercise.
Chip-8 has 30-something instructions and is relatively simple to implement, and test driving it is pretty easy too. I thought it was a really wonderful first emulation exercise.
http://en.wikipedia.org/wiki/CHIP-8