What surprised me was that this entire walk is fully hardware-driven -- no microcode involvement at all. The state machine reads the page directory entry, reads the page table entry, checks permissions, and writes back the Accessed and Dirty bits, all autonomously. Since it's hardware-driven, it runs in parallel with the microcode and needs its own memory bus arbitration -- the paging unit must share the bus with both data accesses from the microcode and prefetch requests from the instruction queue.
书中穿插了不少诙谐故事、民俗谚语，调和了学术理论的严谨与抽象。譬如“韩延寿巧断争田案”中的“县官误解风土”，某郡太守向一县官问话：“此地风土如何？”县官不知道“风土”指的是风俗习惯，于是答道：“风不大，土沙也不乱飞。”太守又问：“黎庶还好吗？”县官更不懂“黎庶”指的是老百姓，回答说：“梨树今年开花少，估计要减产。”看似闲笔，实则暗合执法施政必须考察风土民情的道理，让读者在会心一笑中领会中华法系的吏治知识。
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"That temperature is pretty nice here, really," he says. "Minus five is as warm as it gets. It can get down to about -40, but you're looking at about -20 being the average."
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The UK, like many other countries, has a falling birthrate. But Danny Kruger’s perverse 1970s-style policies offer nothing to mothers-to-be。heLLoword翻译官方下载对此有专业解读
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