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.
Ранее очередной снежный рекорд побила Москва. Столичные сугробы обновили суточный рекорд, шестой в феврале и восьмой с начала года: высота снежного покрова добралась до отметки 72 сантиметра.
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unsigned long long byte_size = sizeof(union alloc_header) + data_bytes;