Playstation 2 Architecture
A correction: the “emotion engine” referred to (at least before launch — perhaps they changed it) the GPU itself, which was the only Sony-designed silicon in the original PS/2.  The TMPR and other silicon were designed and supplied by Toshiba.<p>Also notable: Original Playstation (AKA PS/1) compatibility was provided by simply putting a whole PS/1 on the board — I think it might even have been by then a single chip; if so likely Sony designed.<p>That was an insane project by an amazing team.  I see a comment by me is top of the previous discussion, if you want some more snippets.