开发一个 OS，尽管绝大部分代码只需要用 C/C++等高级语言就可以了，但至少和硬件

相关部分的代码需要使用汇编语言，另外，由于启动部分的代码有大小限制，使用精练的汇

编可以缩小目标代码的尺寸。另外，对于某些需要被经常调用的代码，使用汇编可以提高性

能。所以我们必须了解汇编语言，即使你有可能并不喜欢它。-Development of a OS, even though most of the code, just use C/C++ and other high-level language can be, but at least the relevant parts of the code and hardware need to use assembly language, in addition, due to start part of the code is limited in size, with concise compilation can reduce the size of the object code. In addition, for some code that needs to be frequently invoked, use the assembly to improve performance. Therefore, we must understand the assembly language, even though you may not like it.