JIO_OK ("jump if I/O OK") tests whether CPL ≤ IOPL. The same check gates PUSHF, POPF, INT n, and IRET. The monitor then emulates each instruction as appropriate: maintaining a virtual interrupt flag per V86 task, reflecting software interrupts through the real-mode interrupt vector table, virtualizing I/O accesses, and so on.
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// 此时栈顶就是当前元素的"下一个更大值"（栈空则保持默认值0）。关于这个话题，谷歌浏览器【最新下载地址】提供了深入分析
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The latest test of Space X's giant Starship rocket has failed, minutes after launch.