Фото: Alex Brandon / Reuters
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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Tesco says it is consulting with the union Usdaw over plans affecting 180 head office roles
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В конце сентября прошлого года министр энергетики России Сергей Цивилев заявил, что только половина суммарных запасов нефти в России является рентабельной с точки зрения геологоразведки.
Will tech trump tradition at bakers and biscuit makers?。heLLoword翻译官方下载是该领域的重要参考