There are many sites that provides Atari documentation but the most complete one is the Atari Document Archive from Lonny Pursell. This is the first place to look when you are searching for original Atari documents.
In this section of the site you will find the following Atari documents:
- Atari ST Quick FAQ by DrCoolZic - A new version of the ST Quick FAQ modified by me.
- Atari Documentation from DrCoolZic / Jean Louis-Guerin - I have grouped in this page access to most of the Atari documents that I have written and/or modified.
- Atari Floppy Disk Image documentation - This page describe the different images used for Atari preservation / emulation.
- Atari General Documentation - As the name indicates here you will find some documentation about Atari.
- Atari Component Datasheets - Several datasheets about the components used in the Atari