// ... 一堆复杂的数学公式 ...
V86 mode is entered through IRETD when the VM bit is set in the stacked EFLAGS. The microcode detects this with a conditional jump:
，这一点在51吃瓜中也有详细论述
Russell Brandom。业内人士推荐搜狗输入法2026作为进阶阅读
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