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There's no emulated layer. The CPU offers a 32-bit compatibility mode that works akin to 8086 virtual mode on earlier processors. The 64-bit kernel just sets a
by greyfade 15y ago
There's no emulated layer. The CPU offers a 32-bit compatibility mode that works akin to 8086 virtual mode on earlier processors. The 64-bit kernel just sets a few flags and drops to 32-bit mode, switches tasks and goes. No overhead.