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.
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綜合問卷及官員說法，政府出面回購業權屬被視為時間安排最快的選項，業主在交易完成後即收取現金。問卷引用香港測量師學會根據屋苑火災前的巿場成交價估算，未補及已補地價單位的平均實用呎價分別為約6000元及8000元。
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