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happyfanky's Introduction

#Controller

1、什么是multiboot

multiboot是32位的多系统启动的规范，只要是符合multiboot specification的内核，就能够在Loader支持的文件档案系统内加载内核并启动内核。

2、为什么要遵守multiboot

内核遵守multiboot specification带来的好处是利于我们将关注点集中在内核及之上的内容，我们不必处理实模式->保护模式切换、不必过早地涉及文件系统问题（我认为除非一直用别人的文件系统，否则过早地涉及文件系统无意义），同时利于多系统的并存。在我们的系统构建初期，不可避免地会依赖于现存的文件系统，所以完全可以借助符合multiboot规范的bootloader工具（如grub、grub2）去加载我们的内核。

3、我们一直要用第三方bootloader吗

对于这个问题，我的观念是：我们要有自己的bootloader，一是我们很有可能会有自己的文件系统，这样第三方bootloader只能相当于一个中转工具，来加载我们的bootloader，实现在我们自有的文件系统中加载内核，这时使用第三方bootloader只是给用户的一个自由的选择；二是现在的multiboot并不能说很好用，他也存在一些问题，例如对文件系统的依赖。

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