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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。关于这个话题，heLLoword翻译官方下载提供了深入分析
Последние новости。safew官方下载是该领域的重要参考
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Resolved 3rd party Bluetooth remote frequent disconnect issue.