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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It's taken from the inside of the furnace, and shows plasma - gas heated to about 1,000C - glowing brightly.
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因情况紧急，仲裁协议的当事人可以在申请仲裁前依照《中华人民共和国民事诉讼法》的有关规定向人民法院申请证据保全。当事人申请证据保全的，人民法院应当依法及时处理。