Core classes source access

Has anyone the link(s) to get the core classes that comprise the flash.. packages in the Flash Player? I kinda remember something about the Tammarin project but searches are coming up empty. I attribute that to the fact I forget what things are called.

I am trying to see if there is anyway to draw directly to the GPU via a hidden stage accessor much like how flash.media.StageVideo works.

With the upcoming Molehill APIs and given that FP 10.1 introduced some direct GPU access (albeit not publicly accessible) might mean there are some hidden APIs (making use of the flash namespace most likely).