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.
Gen Sir Richard Shirreff says US president has launched war of choice in Iran with no clear grasp of how it will end
。业内人士推荐快连下载-Letsvpn下载作为进阶阅读
明明形势一片大好，未来无限可期，却突然发起针对半数员工的大清洗。
Oh, I should mention Ping as well.