Real-mode programs freely execute CLI and STI to control interrupts, PUSHF and POPF to manipulate flags, INT n for DOS and BIOS calls, and IN/OUT for hardware I/O. In normal protected mode, these instructions are privilege-checked -- they execute normally if the caller has sufficient privilege, and fault otherwise. The 386 can't simply let V86 tasks execute them freely -- a DOS program disabling interrupts would bring down the whole system -- but trapping on every INT 21h call would make V86 impractically slow.
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没有苦大仇深的剧情，阿爸很少提起原本的家。至少在我的记忆里，他从没主动和我说过。我第一次知道阿爸和阿姑都是买来的，是从阿嬷口中听到的。很平常，一个聊家常的话题中提起的，她说自己的女儿是买的，女儿的儿子也是买的，然后顺嘴说了一句。那时我上初二，听到的第一反应是好便宜。