The Nintendo Entertainment System (released as the Family Computer in Japan) is the world's most iconic home game console. With a Ricoh 2A03 CPU based on the popular MOS 6502, it had 2KB of RAM, 2KB of VRAM, and with the built in Picture Processing Unit and Audio Processing Unit, was used to run some of the world's most popular games ever released.

Although early NES games were design for 40KB cartriges (32KB of PRG ROM and 8KB of CHR ROM), later advancements led to larger chips being used, and more game content being added, but the system itself remained the same. In order to bridge this gap, Mapper Chips were developed to allow the system access to certain parts of the PRG or CHR ROM sections.

I've created a new NES title to show how programming an NES game from scratch can be accomplished. No Internet for the NES is available now: https://notin.tokyo/nointernet

Development help:
https://www.nesdev.org/wiki/Nesdev_Wiki

Further reading:
https://www.copetti.org/writings/cons...