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.
過去在中國自行創業的他，在美國主要是以送外賣的工作為主，但他坦言對這樣的生活感到滿意，「我在進入美國之後，一直把移民局對我的要求排在第一，不管是要求我去現場報到、家訪、各種視頻通話......按時按點遵守他們的要求。」
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