The original Xbox was x86 and the XB360 is 3-Core PowerPC - but the Xbone is x64. I’m curious how they were able to emulate PowerPC with acceptable levels of pe

The original Xbox was x86 and the XB360 is 3-Core PowerPC - but the Xbone is x64. I’m curious how they were able to emulate PowerPC with acceptable levels of performance (my guess is high-level emulation by reimplementing the XB360’s APIs) - I’m also curious if the Xbone’s original Xbox emulation is just CPU virtualisation - or actual emulation.