Learn

So, you want to know how everything works? You feel you need to make some sort of emulator yourself? The documentation on this page might help you get started...

The NES as a whole

Yoshi's nestech, by yoshi
the NES, by Marat Fayzullin
Loopy on scrolling, by loopy

The 6502 microprocessor

The 6502 microprocessor, by _bnu
Known bugs in the 6502, by Ivo van Poorten

Infos on mappers

Info on all mappers, by \Firebug\
Info on the mmc1 mapper, by Matthew J. Richey
Info on the mmc2 mapper
Info on the mmc3 mapper, by goroh (warning: written in japanese)
Info on the mmc4 mapper