I worked on a couple of Xbox games when the Xbox was around. You didn&#x27;t get much concrete information about it even as part of the official docs. Plenty of stuff about the performance characteristics and memory layout for texture&#x2F;vertex&#x2F;index data, but nothing low level. I think there might have been enough exposed by D3D to let you bypass it entirely, at least in theory, but you&#x27;d have been on your own when it came to figuring out the ins and outs of what needed to go in the FIFO...<p>I vaguely recall somebody from MS saying on the Xbox developer newsgroups that providing the full information wasn&#x27;t part of their deal with NVidia, and that was that.