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.
await dropOld.writer.write(chunk3); // ok, chunk1 discarded
。关于这个话题，搜狗输入法下载提供了深入分析
681 LD_DESCRIPTOR LCALL ; jump to subroutine at 5C9
以美双方的核心目标，是迫使伊朗彻底屈服，最终实现伊朗非核化。具体而言，伊朗必须回到谈判桌前作出非核化承诺，不仅要接受联合国相关机构的核查，还要同步接受以色列和美国的检查，同时销毁本国现有的全部核设施。