* [https://github.com/libsidplayfp/SID_schematics/wiki SID internals documentation]
*[https://www.oxyron.de/html/registers_sid.html Oxyron SID reference]
*[https://www.wothke.ch/tinyrsid/index.php webSID] Online SID chip emulator
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[[Category:Non CPC Computers]][[Category:Music and sound|*]]