Reverse engineering the 76477 sound effect chip

https://www.electronics-lab.com/reverse-engineering-76477-sound-effect-chip/

Ken Shirriff has written an article on reverse engineering the 76477 “Space Invaders” sound effect chip: Remember the old video game Space Invaders? Some of its sound effects were provided by a chip called the 76477 Complex Sound Generation chip. While the sound effects1 produced by this 1978 chip seem primitive today, it was used […]