SID_schematics

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Reverse-engineering of the MOS 6581/8580 SID schematics by Leandro Nini and ttlworks, based on silicon layouts photographed by Michael Huth and revectorized and annotated by Tommi Lempinen.

https://github.com/libsidplayfp/SID_schematics/wiki

Original DIE pictures by Michael Huth: https://retronn.de/imports/commodore_chips.html (old page: http://mail.lipsia.de/~enigma/neu/6581.html)

Original layouts by Tommi Lempinen: http://oms.wmhost.com/misc/

Discussion: http://forum.6502.org/viewtopic.php?f=8&t=4150

Diagrams made with Dia: https://wiki.gnome.org/Apps/Dia