个人写的程序，见笑，两个功能：1、实现微妙级别的时间控制。2、控制并口输出的信号波形，三口的方波，详细使用方式和我联系-personal written procedures, laughed at, the two functions : one, to achieve a delicate time control level. 2, the parallel port control output signal waveform, three of the square, use and

前段时间做了一套超市收银系统，把其中的小票打印代码贡献给大家,并口小票打印机，肯定有朋友正在找这个功能，需要的朋友不用开发，拿去就能用。但愿能帮到你。-Some time ago to do a supermarket cash register system, in which the contribution of small ticket printing code to give you, a friend in need can be used to be able to use oh