Playing the NES with a Family BASIC Keyboard: A Retro Hardware Hack

Linus Akesson connected a Family BASIC keyboard to an NES using a custom adapter to play its unique triangle waveform live. He details the adapter's creation, covering the Family BASIC keyboard's matrix layout, the NES controller port's signal characteristics, and the use of an ATtiny85 microcontroller for multiplexing and serializing the signals. The result? A successful performance of a tune called "Platform Hopping," showcasing impressive retro hardware hacking skills.