Фото: Toby Melville / Reuters
"dimensions": [],，详情可参考夫子
。关于这个话题，safew官方下载提供了深入分析
Switch decoder at inference。关于这个话题，safew官方版本下载提供了深入分析
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.