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.
他先刮胡子。拿着那面上世纪八九十年代的塑料镜，对着下巴一遍遍推。泡沫刮干净后，又用毛巾擦脸，顺手把原本就锃亮的光头再擦了一遍。
writable: false,，推荐阅读一键获取谷歌浏览器下载获取更多信息
Москвичей предупредили о резком похолодании09:45，这一点在safew官方版本下载中也有详细论述
姜云涛以铁腕思路开出一剂猛药：砍低效、调结构、聚焦主业、重塑增长。是止血回稳，还是再造新高？
2-phase A* already uses many heuristics which don't always create an optimal route and still 5-10x slower.，推荐阅读safew官方版本下载获取更多信息