When VM=1, the protected-mode bit goes low and the Entry PLA selects real-mode entry points -- MOV ES, reg takes the one-line path. Meanwhile, CPL is hardwired to 3 whenever VM=1, so the V86 task always runs at the lowest privilege level, under full paging protection. The OS can use paging to virtualize the 8086's 1 MB address space, even simulating A20 address line wraparound by mapping pages to the same physical frames.
——“努力创造无愧于时代的新业绩”
，这一点在雷电模拟器官方版本下载中也有详细论述
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OsmAnd's Faster Offline NavigationJune 11, 2025 · 13 min read
stack2.pop(); // 弹出无效的候选值