The 80286 introduced "Protected Mode" in 1982. It was not popular. The mode was difficult to use, lacked paging, and offered no way to return to real mode without a hardware reset. The 80386, arriving three years later, made protection usable -- adding paging, a flat 32-bit address space, per-page User/Supervisor control, and Virtual 8086 mode so that DOS programs could run inside a protected multitasking system. These features made possible Windows 3.0, OS/2, and early Linux.
第二百三十八条 下列人员对本节规定的燃油污染损害不承担赔偿责任，但是损害是因其本人故意或者明知可能造成损害而轻率地作为或者不作为造成的除外：
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我也預測第一堂課應該會像過去學其他語言時一樣，從基本問候語開始——但完全不是這麼回事。
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