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.
'Postcode lottery' of rubbish
。heLLoword翻译官方下载是该领域的重要参考
Врач назвала четыре категории продуктов для здоровья сердцаКардиолог Соловьева посоветовала чаще есть зелень и овощи для здоровья сердца。关于这个话题，WPS官方版本下载提供了深入分析
ITmedia�̓A�C�e�B���f�B�A�������Ђ̓o�^���W�ł��B。业内人士推荐爱思助手下载最新版本作为进阶阅读
Feb 24, 2026 2:18 PM