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.
Other fans, like Sasha Stinger, feel it is time for the festival to expand.，这一点在im钱包官方下载中也有详细论述
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This article originally appeared on Engadget at https://www.engadget.com/big-tech/ebay-will-lay-off-800-workers-or-6-percent-of-its-staff-191500844.html?src=rss
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