在DOS系统本身是不支持多任务的。此源程序为在DOS下实现多任务的简单例程-DOS system itself does not support multi-tasking. This source of the DOS multi-task under the simple routines

多任务操作系统控制的DOS环境下的实现的C语言源程序。 利用时间片的方式，多个程序在DOS下并行运行。-multi-task control of the DOS operating system environment on the realization of the C language source code. The use of time unit, a number of procedures under the DOS operating in parallel.

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

RS232 中断开发 C 语言源程序 包内包含C源代码以及汇编子程序-RS232 interrupt the development of C language source code package includes C source code and compiled subprogram