The solution is trap-and-emulate, the same principle later generalized in hardware virtualization extensions. V86 mode adds a special rule: since V86 tasks always run at CPL=3, if the OS sets IOPL
{ 24, 10, 12, 26, 35, 47, 49, 37 },
。关于这个话题，搜狗输入法下载提供了深入分析
Simple actuators without this capability are a bit like manual transmission cars that need to be shifted into reverse.
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