This repository will contain several tech demos for Nintendo Entertainment System that I've produced over more than a decade prior to 2019. Many of them have patches to their build system to help them ...

This is simple NES/Famicom ROM to test different input accessories. After standard strobe on $4016.0 it reads $4016.0-$4016.7 and $4017.0-$4017.7 (yes, all 8 data lines including not connected on most ...

Among retro gamers, these types of cartridges are the stuff of legend. No one really knows why — it’s not like it’s the a World Championship cart from The Wizard (those go for $20K) — but it is an ...