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.
PC, PlayStation 5, Xbox, Nintendo Switch 2; Capcom
。搜狗输入法2026是该领域的重要参考
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siftDown(arr, n, largest); // 递归下沉