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.
到了守岁的十二点了,又要放鞭炮,我没再追问宴席的细节。阿爸把那挂红鞭炮提到门口,鲜红的一长串,铺在水泥地上。火星一路蹿过去,红纸炸开,碎屑落满一地。
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'It's our only option'
那个童年的小巷,时间越久越像一个仿佛并不存在的乌托邦。如视频里所说:“你醒啦,你做了一场很长的梦。”