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.
FT Edit: Access on iOS and web，这一点在搜狗输入法2026中也有详细论述
1936年10月，历经艰苦卓绝的二万五千里长征，红军三大主力胜利会师，淬火新生的中国共产党由此开启了中国革命波澜壮阔的新画卷。。业内人士推荐Line官方版本下载作为进阶阅读
Publication date: 28 February 2026，更多细节参见WPS下载最新地址