这是PROTEL的一个使用的辅助软件，欢迎使用，好用的话就顶我下，给偶这个小虾点甘露。-This is a PROTEL use assistive software are welcome to use, easy to use, then on top of me to even point this shrimp mannose.

protel99se辅助小工具，滑动鼠标滚轮可以实现放大缩小原理图，右键可拖动。-a small auxiliary tool for protel99se

帮助你学习单片机，了解单片机的运行和控制。很好的辅助软件-Help you learn microcontroller, to understand the operation of the microcontroller and control. Very good auxiliary software