说明：  RTX51源代码及使用指南；解释如何使用 rtx51小型实时操作系统并给出 rtx51完全版功能的概述 这 个手册并不是一本详细的实时应用的入门教程并且假定你已经熟悉了 Keil C51 A51 相关工具DOS操作系统和8051微处理器的硬件和指令体系
(RTX51 source code and the use of guidelines; explain how to use rtx51 small real-time operating system and gives rtx51 fully functional version of an overview of the manual and not a detailed real-time application portal Directory and the assumption that you are already familiar with the Keil C51 A51 related tools DOS operating system and the 8051 microprocessor instructions and the hardware system)