FWIW, the Xbox 360 chip was based on the processor developed for the PS3. No mention of F-35 here. “These cores are slightly modified versions of the PPE in the Cell processor used on the PlayStation 3” https://en.m.wikipedia.org/wiki/Xenon_(processor)
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FWIW, the Xbox 360 chip was based on the processor developed for the PS3. No mention of F-35 here. “These cores are slightly modified versions of the PPE in the Cell processor used on the PlayStation 3” https://en.m.wikipedia.org/wiki/Xenon_(processor)
Still, nothing would've prevented IBM from using the Cell PPE as the basis for a PowerPC chip for the military, so that doesn't disprove the theory.
I know that the Xenon was being simultaneously taped out with the Cell PPE, so it doesn't derive from another cell derived core.
The book "The Race for a New Game Machine" goes over the timing pretty well.