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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.
。safew官方下载对此有专业解读
冬是天生的贵族。我俩刚在一起时，卡上的钱付完房租，就剩一万，这位爷直接买了台莱卡相机。我心目中的富人就是这种人。穷人富人不是钱的问题，是心态。
Every point gets examined, regardless of where it sits. Points on the opposite side of the map get the same treatment as points right next to the query region. We're doing a lot of unnecessary work.
Жители Санкт-Петербурга устроили «крысогон»17:52