Reverse engineering the 76477 “Space Invaders” sound effect chip from die photos
This chip was for sale on BG Micro as recently as 2008 -- I wonder who ordered a production run? <a href="http://www.popsci.com/diy/article/2008-12/complex-sound-generator-ic-back" rel="nofollow">http://www.popsci.com/diy/article/2008-12/complex-sound-gene...</a>