===8-bit===
*https://atariwiki.org Atari 8bit wiki
*[https://youtu.be/WDAZAgrzNoo How Atari 8-Bit Computers Work!] by [[The 8-Bit Guy]]
*[[Media:Altirra Hardware Reference Manual - 20240921.pdf|Altirra Hardware Reference Manual]] Latest (09/2024!) Atari XL hardware documentation