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.
for (int i = 1; i < n; i++) {,更多细节参见safew官方版本下载
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comes with two stacks - the second one being called the break
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(二)具有网络虚拟定位功能的;