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exchanged = 0; // 发生了交换
，这一点在91视频中也有详细论述
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.，这一点在safew官方版本下载中也有详细论述
在改革开放的前沿广东省深圳市，深圳市福田区方方乐趣中英文学校深耕教育领域二十四载，秉持“中西合璧，方圆相济；树起一帜，走向世界”的办学理念，以校园为中华文化传播阵地，以教育为深港融合、人文交流的桥梁，在粤港澳大湾区建设与深圳建设中国特色社会主义先行示范区的澎湃浪潮中，走出一条“以中华文脉为根、以国际视野为翼”的育人之路，书写爱国爱港、教育融合、培育时代新人的实践篇章。，这一点在爱思助手下载最新版本中也有详细论述