Here is the Atari Falcon030 Nemesis bus and video accelerator instruction scanned booklet.
A copy of the Atari Compendium is located here. I took it from a malware infected site(!) and cleaned it up, took out adverts and other junk placing it here. I plan to revise the listing using better layout and frames/DIV tags.
More resources on the Atari Compendium, including PDF documents, source code etc can be found here.
I also have hosted the SoundPool cloned website with updated software downloads and English translation. If you have further software or details on SoundPool software please let me know. The original website is still available but I don't know how! (DNS issues and hosting maybe unpaid?) It's here but the downloads do not work. -> http://www.soundpool.de/atari/
This is an excellent resource for Atari documentation, covering schematics and manuals etc. It's the Atari Document Archive, located at http://dev-docs.org/.