Just did a writeup on an NES project I've been working on. A dual port RAM replacement for the console that allows you read/write memory live via serial. Routed out a couple of extra pins soldered directly to RESET & NMI to remote reset / frame step for debugging.
Pulling live data from Blades of Steel to create a scoreboard / trigger a relay on a goal:
https://vine.co/v/M6WzFBXeX1e
Triggering a relay on firing in Contra:
https://vine.co/v/M6WZlFjdJ69
A live hex editor inspired by FCEUX:
https://vine.co/v/M6qEpOvMzQz
Frame Stepping:
https://vine.co/v/M6qLIIKUeT6
http://www.batslyadams.com if you want more technical details!
Pulling live data from Blades of Steel to create a scoreboard / trigger a relay on a goal:
https://vine.co/v/M6WzFBXeX1e
Triggering a relay on firing in Contra:
https://vine.co/v/M6WZlFjdJ69
A live hex editor inspired by FCEUX:
https://vine.co/v/M6qEpOvMzQz
Frame Stepping:
https://vine.co/v/M6qLIIKUeT6
http://www.batslyadams.com if you want more technical details!