The first thing a multi-tasking operating system needs from hardware is isolation: multiple programs must share one processor without being able to read, write, or jump into each other's memory. The 80386 achieves this through memory protection -- two independent address translation layers.
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，这一点在爱思助手下载最新版本中也有详细论述
processing, but it should be used with care and with an understanding of its
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