It duplicates logic among modules that is related to communication with external subsystems (e.g. handling Devices).
Besides the Test PLA, the 386 has another PLA called the Entry PLA that maps opcodes to microcode entry points. One of its input bits is a "protected mode" flag. Many instructions have both a real-mode and a protected-mode entry point -- for instance, MOV ES, reg maps to address 009 (a single microcode line) in real mode, but to 580 (which initiates a full descriptor load with protection tests) in protected mode. The trick that makes V86 work is to define this flag as:，这一点在体育直播中也有详细论述
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Цены на нефть взлетели до максимума за полгода17:55
SEDIC, Otocky. Game designer, Star Craft (MobyGames)。体育直播是该领域的重要参考