随着对传输速率要求的日益提高，越来越多的设备都支持并口通讯。目前可用的并口调试工具并不多，而且支持的模式非常有限。为了方便软件和硬件工程师对并口进行调试，开发了该调试工具。该工具支持SPP、ECP、EPP模式的调试。 -With the increasing transmission rate requirements, more and more devices support parallel port communication. Currently available parallel debugging tools are not many, and the support of the model is very limited. In order to facilitate software and hardware engineers to parallel debugging, development of the debugging tools. The tool supports SPP, ECP, EPP mode debugging.