我在本科时的操作系统课程让我们为OS/161构建了许多子系统，这是一个简单的、类似bsd的内核，它提供了一些基础知识，同时在实现更高级别服务时留下了探索各种设计空间决策的自由。

在简要概述了为X86平台编写操作系统所涉及的内容之后，还有很多链接。

看起来最有希望的链接(www.nondot.org/sabre/os/articles)已经不再可用，所以你需要通过Archive.org版本来阅读它。

在一天结束时，引导加载程序获取内核的机器代码，将其放入内存中，然后跳转到它。你可以把任何你想要的机器代码放在内核中，但是大多数C程序都需要一个操作系统，所以你需要告诉编译器它不会有所有这些，或者引导加载程序必须创建一些。

然后，内核完成所有繁重的工作，我怀疑它就是您想要的示例内核。但是，从拥有一个说“Hello world”的内核到拥有一个加载命令解释器、提供磁盘服务以及加载和管理程序的内核，还有很长的路要走。

You might want to consider subscribing to ACM to get access to their older literature - there are lots of articles in the late 80's and early 90's in early computing magazines about how to create alternative OSs. There are likely books that are out of print from this era as well. You might be able to get the same information for free by looking up the indexes of those magazines (which are available on that site - click "index" near the magazine name) and then asking around for people with a copy.

Lastly, I know that usenet is dead (for so sayeth the prophets of internet doom) but you'll find that many of the craggy old experts from that era still live there. You should search google groups (they have dejanews's old repository) and I expect you'll find many people asking the same questions a decade or 1.5 ago that you're asking now. You may even run across Linus Torvalds' many queries for help as he was developing linux originally. If searches don't bring anything up, ask in the appropriate newsgroup (probably starts with comp.arch, but search for ones with OS in the name).

请访问www.mosa-project.org查看托管操作系统联盟(MOSA)项目。他们正在用c#设计一个AOT/JIT编译器和完全托管的操作系统。一些开发人员来自不活跃的SharpOS项目。

可以研究的一个相当简单的OS是µC/OS。这本书有一张印有出处的软盘。

http://en.wikipedia.org/wiki/MicroC/OS-II

你可能还想看看SharpOS，这是一个用c#编写的操作系统。

开始攻击Minix。它比Linux要小得多(很明显)，并且它的设计目的是为了教学(至少在某些方面)。但不是Minix 3，那是一个完全不同的故事。