boolean canBlock;
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.
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第三类是纯粹地喜欢吐槽没有实质的问题反馈，这类便需要使用魔法打败魔法，置之不理，不给予任何的反馈和流量，让它石沉大海。
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