Big parts of the VideoCore IV (Raspberry Pi) are documented - though not completely (especially the video acceleration unit is not yet publicly documented, offi

Big parts of the VideoCore IV (Raspberry Pi) are documented - though not completely (especially the video acceleration unit is not yet publicly documented, officially for the reason that you have to pay license fees for some video codecs): http://www.raspberrypi.org/a-birthday-present-from-broadcom/ http://www.raspberrypi.org/a-birthday-present-from-broadcom/ From the embedded GPUs VideoCore IV is as far as I know thus the most open (but rather the one-eyed among the blind).