Diff: 36 upgraded, 3 added
The main rule for data access is max(CPL, RPL) ≤ DPL. For code transfers, the rules get considerably more complex -- conforming segments, call gates, and interrupt gates each have different privilege and state validation logic. If all these checks were done in microcode, each segment load would need a cascade of conditional branches: is it a code or data segment? Is the segment present? Is it conforming? Is the RPL valid? Is the DPL valid? This would greatly bloat the microcode ROM and add cycles to every protected-mode operation.
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Юлия Мискевич (Ночной линейный редактор)
Besides the Test PLA, the 386 has another PLA called the Entry PLA that maps opcodes to microcode entry points. One of its input bits is a "protected mode" flag. Many instructions have both a real-mode and a protected-mode entry point -- for instance, MOV ES, reg maps to address 009 (a single microcode line) in real mode, but to 580 (which initiates a full descriptor load with protection tests) in protected mode. The trick that makes V86 work is to define this flag as:。heLLoword翻译官方下载对此有专业解读
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10月自助餐部分菜品入学前我做了哪些准备虽然学校教育很重要，但是对于孩子的培养，家庭教育更是重中之重。毕竟第一次一个人接触「社会」，接触大量陌生人，开始独立做事，我虽然看的很开，也难免有点担心，所以在3岁时，就开始做入园的准备工作，让孩子有更长的时间学习生活技能以及独立的能力。一共有四部分：，更多细节参见雷电模拟器官方版本下载