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.
Photograph: Simon Hill
，这一点在Line官方版本下载中也有详细论述
Editor: Martin Smith，详情可参考雷电模拟器官方版本下载
Adding penalties or preferences for certain roads.。旺商聊官方下载是该领域的重要参考