The Nintendo DS is one of those systems ... The best option, of course, is to keep game cartridges inside their original cases. This can be tough to do, however, if you don't have enough room ...

Using a Nintendo on a Chip (NOAC) board, he has fabricated an NES system that fits inside a hollowed out NES cartridge. He purchased a NOAC system at a local resale shop and got to work ...

This was especially apparent with its cartridges, such as in this excellent summary article by [Fabien Sanglard]. In addition to the mask ROM that stored the game data and (optionally) battery ...