说明：  环境要求:Windows 98/2000/XP Keil C51 7.0 版本 本盘附有书中的全部实例的代码模块，提供给读者参考之用。其中部分带有.UV2扩展名文件 的是给出了实例的全部代码并且经过编译的，读者可以直接在Keil C51环境下编译运行。
(environmental requirements : Windows 98/2000/XP Keil C51 7.0 version of the book was available in all the examples the code modules, available to the readers reference. With some of them. UV2 extension of the document is presented examples of all the code and have compiled, readers can direct the Keil C51 compiler operating environment.)