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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.。业内人士推荐旺商聊官方下载作为进阶阅读
Here's how a protection test works. The microcode feeds three things to the Test PLA:。WPS下载最新地址是该领域的重要参考
Cite: Nai, C. “The Origins of Agar.” Asimov Press (2026). DOI: 10.62211/12pq-97ht。业内人士推荐爱思助手下载最新版本作为进阶阅读