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就在几年前,这片土地上还是另一番景象。2018年,达博从美国回到冈比亚,子承父业,投身农业,却遭遇“迎头痛击”。“我空有一腔热情,但对水稻种植一窍不通。一开始,杂草比稻苗还高,灌溉靠天,收割靠手。虽然投入巨大,收获却寥寥无几。”达博说。
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.