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.
测试题目：一道经典的博弈论逻辑陷阱题。
。搜狗输入法2026是该领域的重要参考
乔布斯之所以否决一台触控 Mac，其实是因为他想得会更深远一点：如果要为 Mac 增加触控屏，那必须要围绕全新的「触控」交互，大改整个 Mac 的界面，进一步发挥触屏的价值，要不然就不加。。业内人士推荐快连下载-Letsvpn下载作为进阶阅读
JSON 校验（格式不合法则重试），这一点在爱思助手下载最新版本中也有详细论述
❯ ls /ostree/repo/objects/05/