<story><title>Reverse engineering the 76477 “Space Invaders” sound effect chip from die photos</title><url>http://www.righto.com/2017/04/reverse-engineering-76477-space.html?m=1</url></story><parent_chain></parent_chain><comment><author>dorfsmay</author><text>Pretty amazing! Reminds the article from 2002 which had to be one of the biggest Slashdot moment for me, from somebody who wrote code to play music from a scanned image of an LP.&lt;p&gt;&lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;www.cs.huji.ac.il&amp;#x2F;~springer&amp;#x2F;DigitalNeedle&amp;#x2F;index.html&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.cs.huji.ac.il&amp;#x2F;~springer&amp;#x2F;DigitalNeedle&amp;#x2F;index.html&lt;/a&gt;</text></comment>
<story><title>Reverse engineering the 76477 “Space Invaders” sound effect chip from die photos</title><url>http://www.righto.com/2017/04/reverse-engineering-76477-space.html?m=1</url></story><parent_chain></parent_chain><comment><author>squarefoot</author><text>I played with that chip as a kid, probably still have it somewhere but not in good condition as I recall it becoming very hot during operation. 
One day I built the full demonstration circuit similar to the one in this pic.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;upload.wikimedia.org&amp;#x2F;wikipedia&amp;#x2F;commons&amp;#x2F;4&amp;#x2F;42&amp;#x2F;76477_Demo_Circuit-D.JPG&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;upload.wikimedia.org&amp;#x2F;wikipedia&amp;#x2F;commons&amp;#x2F;4&amp;#x2F;42&amp;#x2F;76477_De...&lt;/a&gt;&lt;p&gt;It took forever to finish as I wasn&amp;#x27;t that skilled at the time and the number of switches and pots was simply beyond everything I had soldered before, but I managed to succeed it and spent some good evenings playing with its effects.</text></comment>