Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10142-1
Intel documentation describes the 386's Protection Test Unit as a component that "implements fast testing of complex memory protection functions." It is mostly composed of a PLA (Programmable Logic Array), referred to as Test PLA by Intel, that is physically visible by its regular appearance on the die. This single piece of combinational logic replaces what would otherwise be dozens of multi-cycle conditional branches in the microcode. Instead of testing privilege rules sequentially, the microcode issues a single protection test operation, and the PLA evaluates all applicable rules in parallel, producing a complete decision in one evaluation: continue, fault, or redirect to a gate handler.
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Skip content and continue reading疫情封鎖下「養狗熱」：你真的凖備好養寵物了嗎？2021年1月28日
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不少人觉得绿联性价比特高，很能打，服务也特强，比如之前就有新疆的差友表示，绿联是新疆少见的只买一根数据线也给包邮的旗舰店。
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