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> It was designed to be completely different from previous console CPUs.

Sure, but they used a PowerPC core with specialized SIMD processors that they then extensively documented:

https://arcb.csc.ncsu.edu/~mueller/cluster/ps3/SDK3.0/docs/a...

If they hadn't done the latter, it would probably have taken a lot longer to reverse engineer. It also would have made it near impossible for developers to code effectively for it, however.



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