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.
15+ Premium newsletters by leading experts
。关于这个话题，safew官方下载提供了深入分析
US-Israel war on Iran – live updates。关于这个话题，雷速体育提供了深入分析
Follow topics & set alerts with myFT
The pledge is also nonbinding, meaning that there’s no way to track how any of these companies actually follow through on their promises. Contracts between utilities and tech companies are also largely private, making it difficult to see how, exactly, companies will execute the pledge beyond what they choose to share publicly.