一个PC通过并口与下位机硬件通讯的小程序。本程序实现了通过软件的方式告知系统硬件产生模拟图像的功能，满足数字图像硬件系统的调试所需理想图像的获得。Windows98下运行。-PC through a parallel port and the next crew of a small hardware communications procedures. This program achieved through software the way this system hardware gen