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.
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this problem, of reliable and secure cash handling within the bank branch. The，更多细节参见heLLoword翻译官方下载
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铁路部门还指出，部分媒体展示的购票界面并非 12306 官方页面，并提醒旅客务必通过官方渠道购票，若已购买其他车票需及时取消候补订单，以免造成误解。，推荐阅读快连下载-Letsvpn下载获取更多信息
与其说是技术问题，不如说是一个被长期忽视的基础工程问题。