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The TLB lookup is combinational -- it evaluates in the same half-cycle as the limit check, requiring no additional clock. The common case (TLB hit, no page boundary crossing) adds zero overhead to a memory access. This is why the Segment Descriptor Cache and Page Cache (TLB) together occupy such substantial die area -- they are the fast path that makes protected mode competitive with real mode.，详情可参考快连下载安装
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He says he was drawn to reinventing Slazenger because of its "interesting history", but that his generation didn't know what it stood for.
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