const cur = val; // 简化变量名，代表当前价格
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.
，更多细节参见旺商聊官方下载
优点： 梯度连续，优化更稳定。
从日常使用的角度考虑，第一档防窥强度基本上就完全足够了，几乎不影响屏幕显示素质。
Despite Discord's assurances, he says he would not trust his data would be kept secure if required to verify his age.