DOS操作系统的C语言源代码 强烈推荐！！！ 可以用来学习基于字符界面的操作系统的设计，包括了FAT文件系统、操作系统内核以及一些常用工具。-DOS operating system in C language source code strongly recommended! ! ! Can be used to study the character based on the design of the operating system, including the FAT file s

winsail v2.0是用于DOS下的图形界面空间系统，特别适合嵌入式系统使用。-winsail v2.0 for DOS graphics interface space systems, particularly suitable for embedded systems.