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+Tegra/Tegra2 reverse engineering notes.
+
+Tegra uses PIO fifos. The design is fairly recent but I can't match it to a
+specific nv** version yet. Of course the offsets don't match other graphics
+objects, seemingly those are much smaller. Still, they speak OpenGL (ES) at
+the hardware level though. Color constants seem to be given as float values
+always.
+
+The graphic object layout:
+0x044 put
+0x264 current program addr
+0x3d4 active texture 0
+0x3d8 active tex 1
+...
+0x3e8 pixel store
+0x3ec pixel store
+0x3f4 utilisé dans glHint
+0x3f5 utilisé dans glHint
+0x4ec vertex attribute
+0x4f4 glRenderbufferPparameteriv
+0x4f8 blend eq separate
+0x4fc blend eq separate
+0x500 Blend func src RGB
+0x504 Blend func dst RGB
+0x508 Blend func src A
+0x50c Blend func dst A
+0x512 blend color 
+0x514 blend color 
+0x518 blend color 
+0x51c blend color
+0x520 clear color 
+0x524 clear color 
+0x528 clear color 
+0x52c clear color 
+0x538 depthfunc
+0x53c clear depth
+0x540 depth mask
+0x544 stencil mask
+0x548 stencil mask separate
+0x550 clearstencil
+0x5a4 line width
+0x5a8 scissor X
+0x5ac scissor Y
+0x5b0 scissor width
+0x5b4 scissor height
+0x5c8 depth near
+0x5cc depth far
+