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August 22, 2009

昨天装了黑金塔,很自然的去看了apple4.us,居然就看到这篇“苹果电脑多任务功能的进化简史(一)”,里面的那些早期的Mac界面图片,让我想起了我最早的那台Mac.

我那台Mac的来路很奇特。当时我们刚到美国几个月,有朋友说要送我们一个旧沙发床,结果来送的人我们完全不认识。他老兄说自己手上有好多有历史的旧东西,比如这个沙发床,就是某个80多岁的老奶奶的,这个老奶奶在这个沙发床上面养大了她所有的娃。然后这个老兄问我是干嘛的,知道我是学计算机的,就说:那我这里有个东西你要不要?

接着他就去车里拿了个厚厚的笔记本出来,白色的外壳已经开始发黄,但是上面的苹果标记还是让我很敬仰的接了过来。打开来,浅灰色的键盘,键盘下方还有一个轨迹球,要知道这个东西怎么看都是80年代的东西,80年代,笔记本?轨迹球?

电池自然是没电了,我翻了翻自己的工具箱,找到一个电源正好符合规格。接上电,按下启动按钮,单色显示器上面就出现了Mac的启动画面。

我留下了这个老古董,甚至后来我着迷汽车计算机界面的时候,还在上面开发了点小东西,又专门焊了一根电缆,用来和我做的汽车计算机接口通信,直到它最后坏掉。

和现在我手边这台装了黑金塔的MSI WIND相比,我必须说,Mac在用户界面的保持上面,要比windows做的好太多了,如果说从win31到win95我还可以容忍的话,那么到WinXP几乎就是一场灾难,难怪当时系主任给全系的研究生发了个email,里面只有一张照片,就是学校门口的小店的招牌:We remove XP 【我们卸载XP】。而苹果的界面,左上角那个苹果的标志,这么多年以后,依然在那里。

扯远了。apple4.us那篇文章里面提到的简单硬件上面的多任务切换,在当时的个人计算机世界里面的确是个问题。原因主要是硬件没有跟上,16位的芯片里面,支持虚拟内存管理的功能还没有呢。于是程序员们只好用各种办法去截获中断,切换内存,或者让程序驻留在内存里面,直到便宜的CPU进入32位的时代。

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