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.
converted tokens into cash. You had to have a token—and to get one, you appeared
，这一点在夫子中也有详细论述
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
The idea of building a nuclear reactor as a power source on the Moon is not new.
Image Credit: Sausly