I'm not sure how the UAE component came into being and who created it and whether this was done under license from Tobias and Alex, but at least one manufacturer (Elbox) reverse engineered the P96 interface without paying for the license, very much to the dislike of Alex and Tobias. Which, in one way or another, let to the halt of development. Thank you, Elbox!
Brian King created it...
http://amiga-news.de/en/news/AN-2001-10-00276-EN.html/*
* UAE - The U*nix Amiga Emulator
*
* Picasso96 Support Module Header
*
* Copyright 1997 Brian King
Brian_King@Cloanto.com>
*/