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.
让所有人在十年后，仍然需要 iPhone，详情可参考WPS下载最新地址
。关于这个话题，爱思助手下载最新版本提供了深入分析
// ⚠️ 易错点3：此处返回n而非0（完全有序无需排序，长度为0）。im钱包官方下载是该领域的重要参考
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