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.
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换句话说，在未来两三年内，整个智能手机市场都要承担上游内存供应不足带来的压力，而让行业担忧的不单单是这次的涨价。AI 产业的蓬勃发展，以 “虹吸效应” 席卷所有核心计算资源，从底层的芯片、内存、存储，到终端的显卡、CPU、整机，可能都会被争夺。