AMD Releases Additional R600 GPU Programming Documentation
 

In the second NDA-free documentation dump, AMD has just
released programming data on the M76 and RS690 graphics processors.
While the RadeonHD developers have already had these documents, this
information will help the free software community in understanding the
internal workings of AMD's graphics processors. In this article, we have
information on this just-released data as well as what else the
community can expect in the way of documentation in the near future.

http://www.phoronix.com/vr.php?view=11655