How does V86 work at the hardware level? When the VM bit (bit 17) of EFLAGS is set, the processor enters a hybrid state: it is still in protected mode with paging and privilege rings active, but most instructions execute as if the processor were in real mode. Segment addresses are computed as selector
Every V86 segment gets the same treatment: access rights 0xE200 (Present, DPL=3, writable data segment), base = selector shifted left by 4, and limit = 64 KB. The microcode loops through all six segment register caches using a counter, applying the same fixed descriptor to each one. This is pure real-mode emulation, enforced at ring 3 with full paging protection underneath.，推荐阅读同城约会获取更多信息
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18:46, 27 февраля 2026Бывший СССР。关于这个话题，Safew下载提供了深入分析