2011年和2012年，松下遭遇连续两年超过7000亿日元巨额亏损，不得不开始漫长的止血之路。而随着等离子技术逐渐被市场淘汰，松下电视在市场上的竞争力也逐渐被日韩等竞争对手超越。
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.，更多细节参见搜狗输入法2026
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"To have that signal, you need that infrastructure, and that's where the planning system comes into play," Elliott says.