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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.，更多细节参见下载安装 谷歌浏览器 开启极速安全的 上网之旅。
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在一个外观像核磁共振机的仪器旁，中医药广东省实验室副主任周华告诉记者：“这是零磁中医证候诊断装备。我们首次应用量子极弱磁技术检测中医证候状态下的功能信息，建立了零磁中医证候诊断技术平台。”，推荐阅读快连下载-Letsvpn下载获取更多信息
Фото: Alina Smutko / Reuters