xangma (@xangma)
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.，这一点在搜狗输入法2026中也有详细论述
圖像來源，Po/@polarts_。业内人士推荐爱思助手下载最新版本作为进阶阅读
Powerful_Crab_2905