>>32 unwritten law that states a virtual machine always has to implement an architecture that doesn't already exist as hardware.
http://en.wikipedia.org/wiki/Virtual_machine#Emulation_of_the_underlying_raw_hardware_.28native_execution.29
The standard x86 processor architecture as used in modern PCs does not actually meet the Popek and Goldberg virtualization requirements. Notably, there is no execution mode where all sensitive machine instructions always trap, which would allow per-instruction virtualization.
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There are periods in the life of human society when revolution becomes an imperative necessity, when it proclaims itself as inevitable.