Matthias made a Picasso II clone for the Amiga 500. The Picasso II is a popular graphics card for the Amiga computer, made by Village Tronic. Later Georg Braun developed a clone for his GBA 1000 Amiga computer. Matthias adapted this design for the Amiga 500. You can follow the progress on the a1k forum (German language).
Website: http://www.a1k.org
Source: http://www.richardlagendijk.nl