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.
彼时的完美日记，是所有美妆节点的绝对主角，声量、销量、话题度一骑绝尘，成为新消费时代最具代表性的成功样本。
，这一点在搜狗输入法2026中也有详细论述
But this week, a US Commerce Department official told lawmakers that none of those chips have yet been sold to Chinese customers.
Where we're coming from