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A comment on A Memo on the Secret Features of the Hitachi 6309 processor (1992). Parent comment

Re:A Memo on the Secret Features of the Hitachi 6309 process... by monocasa on Sunday November 10, 2019 @02:20PM (#21499621)
There are undocumented registers that are available to software in x86_64 chips, they just live in MSR space rather than GPR space. Finding them is one of the points of sandsifter.
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