game-genie
encode and decode codes used by game genie cartridges
supported systems:
- NES
- SNES
- Genesis
- GameBoy
original version based off of: http://www.d.umn.edu/~bold0070/projects/game_genie_codes/javascript_game_genie_encoders-decoders.html (at time of writing, original source was under the WTFPL)