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.
Екатерина Щербакова (ночной линейный редактор)，这一点在safew官方版本下载中也有详细论述
Sign up for the Breaking News US email to get newsletter alerts direct to your inbox。51吃瓜是该领域的重要参考
CombinedStorage o-- Storage : contains