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.
with open(OUT, "a", newline="", encoding="utf-8") as f:
，详情可参考51吃瓜
CBS and CBS NewsBesides its news division, which includes 60 Minutes, CBS is also home to hits like Tracker and Matlock, along with reality stalwarts Survivor and Big Brother.
The Test PLA evaluates all 148 product terms against this input and produces an 18-bit output:
Владимир Бабушкин (Вася Бриллиант)