In-depth technical information
- Atari STE FAQ compiled by The Paranoid / Paradox
- Blitter manual
- Line A documentation
- Memory Map for Atari ST,STE,TT and Falcon
- MFP MK68901
- The Atari Enhanced Joystick Ports FAQ
- The authoritative guide to the Falcon video hardware
- YM2149 Programmable Sound Generator
There are a lot of Atari hardware documentation at the Atari Document Archive