The controller for Nintendo‘s beloved NES game console was surprisingly simple compared to today’s standards. It consisted of only 4 buttons (A, B, Start, Select) and a directional pad. But as you can see from this video by Dave Nunez on YouTube, it was shockingly complex in its design. In the video, he examines how the controller’s CD4021 chip worked and the creative ways it was designed to communicate with the console.
Via Dave Nunez