* [[Media:Inside Commodore DOS.pdf|Inside Commodore DOS]]
* [https://www.c64-wiki.com C64 Wiki]
* [https://www.oxyron.de/html/registers.html Oxyron IC reference]
* [https://problemkaputt.de/pagezero.htm Noca$h's Pagezero]
* [https://youtu.be/ZsRRCnque2E The Ultimate Commodore 64 Talk] Everything about the C64 in 64 Minutes