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.
Более 100 домов повреждены в российском городе-герое из-за атаки ВСУ22:53。关于这个话题，体育直播提供了深入分析
Фото: Алексей Майшев / РИА Новости。同城约会对此有专业解读
13:34, 3 марта 2026Россия，更多细节参见体育直播
The complete RCade