For segments, the job is split between hardware and microcode. When LD_DESCRIPTOR fires its protection test at 5CD, the Test PLA OR's the A-bit (bit 8 of the descriptor high DWORD) into a temporary register called PROTUN. Then the microcode at PROT_TESTS_PASSED takes over and writes the modified value back to the GDT or LDT in memory:
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Maggie 姐每天开工前都要在湾仔道一家发廊弄头发（图：南方人物周刊记者 方迎忠）
Scott's fatal mistake was chasing nostalgia. But beyond that, Williamson's first kills here are more vicious than those in Scream. They're more on par with the graphic violence seen in the torture porn trend that would follow the release of Scream 3 — a trend that is part of the reason this franchise went fallow for 11 years.