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等级森严的制度
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一切皆文件
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超越容量的界限
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来自外部的声音
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编写不朽的传奇
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天下武功唯快不破
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<a href="." >编写不朽的传奇</a>
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<h2 id="编写不朽的传奇">编写不朽的传奇</h2>
<p>最后, 我们再来做一些小小的修改, 来展示我们亲手搭建的计算机系统.</p>
<p><div class="panel"><div class="lab">展示你的计算机系统</div><div class="word-in-panel"><p>让Nanos-lite加载第3个用户程序<code>/bin/videotest</code>,
并在Nanos-lite的<code>events_read()</code>函数中添加以下功能:
当发现按下F12的时候, 让游戏在仙剑奇侠传和videotest之间切换.
为了实现这一功能, 你还需要修改<code>schedule()</code>的代码:
通过一个变量<code>current_game</code>来维护当前的游戏, 在<code>current_game</code>和hello程序之间进行调度.
例如, 一开始是仙剑奇侠传和hello程序分时运行, 按下F12之后, 就变成videotest和hello程序分时运行.</p>
</div></div></p>
<p><div class="panel"><div class="box">万变之宗 - 重新审视计算机</div><div class="word-in-panel"><p>什么是计算机?
为什么看似平淡无奇的机械, 竟然能够搭建出如此缤纷多彩的计算机世界?
那些酷炫的游戏画面, 究竟和冷冰冰的电路有什么关系?
看着仙剑奇侠传运行的画面, 不妨思考一下, NEMU和AM分别如何支撑仙剑奇侠传的运行?</p>
<p><img src="images/cs-hierarchy.jpg" alt="cs-hierarchy"></p>
</div></div></p>
<p><div class="panel"><div class="lab">世界诞生的故事 - 终章</div><div class="word-in-panel"><p>感谢你帮助先驱创造了这个美妙的世界! 同时也为自己编写了一段不朽的传奇! 也希望你可以和我们分享成功的喜悦! ^_^</p>
<p>故事到这里就告一段落了, PA也将要结束, 但对计算机的探索并没有终点.
如果你想知道这个美妙世界后来的样子, 可以翻一翻<a href="http://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-manual-325462.pdf" target="_blank">IA-32手册</a>.
又或许, 你可以通过从先驱身上习得的创造力, 来改变这个美妙世界的轨迹, 书写故事新的篇章.</p>
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<footer class="page-footer-ex"> <span class="page-footer-ex-copyright"> By <a href="https://sashimi-yzh.github.io/" target="_blank">Zihao Yu</a>, 采用<a href="http://creativecommons.org/licenses/by-nc-sa/3.0/cn/" target="_blank">知识共享 署名-非商业性使用-相同方式共享 3.0 中国大陆 许可协议</a>发布 </span>            <span class="page-footer-ex-footer-update"> 此页面修订于: 2019-05-03 18:28:28 </span> </footer>
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