近年来,计算机的应用在我国得到了很快地发展,特别是单片机的体积小,速度快,价格低,在各种控制系统中得到了越来越多的应用。但是,一般单片机只能用机器语言来输入和调试程序,将给用户带来很多的困难。为使单片机系统的应用更为简单方便,已越来越引起大家的关注。虽然,MCS—48系列单片机开发系统已经问世,但它 In recent years, the application of computer has been developed rapidly in our country, especially the small size, high speed and low price of single chip microcomputer have got more and more applications in various control systems. However, the general microcontroller can only use machine language to enter and debug the program, will give users a lot of difficulties. In order to make the application of single-chip microcomputer system more simple and convenient, it has attracted more and more attention. Although, MCS-48 series microcontroller development system has come out, but it