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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The topic of always-online live-service games shutting down and ultimately becoming unplayable has been a popular topic of internet discourse for many years. Through my work on Towerborne I've seen first-hand just how challenging and time-consuming it can be to make a game originally designed like this work offline. Every game has its own unique challenges in both design and technical architecture, making offlining a uniquely complex undertaking that is hard to understand for many of its players. However, the Native AOT approach we leveraged shows that it is possible and I hope other developers finding themselves in a similar position find it useful in showcasing one possible path.，这一点在旺商聊官方下载中也有详细论述
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