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.
Bill Clinton told a congressional committee on Friday he “had no idea of the crimes” Jeffrey Epstein was committing and insisted he “did nothing wrong” in his relationship with the convicted sex trafficker.
，详情可参考Line官方版本下载
「像鬼一樣工作」：台灣外籍移工為何陷入「強迫勞動」處境
中国援冈比亚农业技术合作项目组供图