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RYP4 (YM2154) Programmer's Guide published

A project log for Yamaha PSR-70 reverse engineering

Reverse engineering a Yamaha PSR-70 keyboard, in order to write documentation for the YM3806 and YM2154 sound chips.

jkn0JKN0 • 07/03/2021 at 16:57•0 Comments

The PSR-70 drum chip YM2154, or RYP4, is now reversed and the Programmer’s Guide is published. Link to the guides: https://github.com/JKN0/PSR70-reverse/tree/master/Guides

More details about reversing the RYP4: https://retroandreverse.blogspot.com/2021/07/secrets-of-ym2154.html

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