* [[Media:Vic6569-timing-chart.pdf|VIC II Timing Chart]]
* [[Media:C64 pla dissected r1.1 a4ds.pdf|PLA chip dissected]]
* [[Media:Inside Commodore DOS.pdf|Inside Commodore DOS]]
* [https://www.c64-wiki.com C64 Wiki]
* [https://c64.krissz.hu/online-playable-games/ Online Playable C64 Games]