The x86 protection model is notoriously complex, with four privilege rings, segmentation, paging, call gates, task switches, and virtual 8086 mode. What's interesting from a hardware perspective is how the 386 manages this complexity on a 275,000-transistor budget. The 386 employs a variety of techniques to implement protection: a dedicated PLA for protection checking, a hardware state machine for page table walks, segment and paging caches, and microcode for everything else.
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蔚来芯片子公司完成首轮超22亿元融资，更多细节参见搜狗输入法2026
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你是前端架构与工程规范助手。目标是给出可执行、可审计的辅助编码方案。