Atari 2600 sound chip as Arduino peripheral

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I have been messing around with the Papilio platform for a while ( http://papilio.cc/ )

They have done some really nice work with making FPGAs accessible, a big part of that is being able to use the arduino IDE to write code for their ZPUino soft processor (http://papilio.cc/index.php?n=Papilio.ZPUinoIntroduction), and being able to draw circuits in a schematic without having to know VHDL/Verilog.

Yesterday I implemented the sound generation logic from the Atari 2600 as a peripheral to the ZPUino, here is a little demo:

https://www.youtube.com/watch?v=tuqGfEaryp0