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.
在校园里，孩子们时常举起戴在手腕上的手表，彼此一碰，便加为好友。
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2024年12月19日，习近平总书记在澳门科技大学考察时指出：“中医药是中华文明的瑰宝，传承创新发展中医药是件大事。要把这一祖先留给我们的宝贵财富继承好、发展好、利用好，推动中医药走向世界。”
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