本文详细介绍了Linux 内核的裁剪、文件系统的定制、为Linux 内核增加实时内核(构 建双内核系统)、RTLinux 的API 以及通过U 盘在PC/104 的DOC(DiskOnChip)上安装Linux的方法。另外,为完善系统的功能,简单介绍了网络和图形界面的加载。 关键词:PC/104;DOC;实时Linux;MiniGUI Abstract: This paper describes the cutting of Linux kernel, file system customization, adding real-time kernel to Linux (forming a double kernel operating system), RTLinux API, and the implementation of installing an embedded real-time Linux into a DOC (DiskOnChip) mounted upon a PC/104 module. Moreover, in order to make the system more practical, this paper also introduces the way to add network facilities and graphic user interfaces. Keywords: PC/104;DOC;real-time Linux;MiniGUI