Ken Shirriff's blog
Computer history, restoring vintage computers, IC reverse engineering, and whatever
Showing posts with label
electronics
.
Show all posts
Showing posts with label
electronics
.
Show all posts
Reverse-engineering a tiny 1980s chip that plays Christmas tunes
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For the holidays, I decapped a chip that plays three Christmas melodies. The UM66T melody chip from the 1980s was designed for application...
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Yamaha DX7 chip reverse-engineering, part 4: how algorithms are implemented
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The Yamaha DX7 digital synthesizer (1983) was the classic synthesizer in 1980s pop music. It uses two custom digital chips to generate sou...
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The Yamaha DX7 synthesizer's clever exponential circuit, reverse-engineered
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The Yamaha DX7 digital synthesizer was released in 1983 and became extremely popular, defining the sound of 1980s pop music. Because micro...
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