Microsoft just released the official specs of the next XBox with more info.
Official XBOX 360 Specifications Available
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Eugenia Loli
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It is very well known that IBM has worked with Microsoft to develop a custom CPU for the XBox360.
Sorry Hakime but your wrong. Go look it up!
The VMX instructin set is made by micrsoft thats been talked about many times before and ms even has quoted official its “custom” instruction set.
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&…) is the patent link.. there was other articals on srpong as well.. i cant remember which video or press release ms said that they created a custom instruction set sorry.