扫描PCI设备的演示程序，在DOS下的DJGPP下完成，对学习PCI的底层开发将有很大帮助，相关文章介绍请参考：http://hengch.blog.163.com/blog/static/10780067200822893345451/-PCI scanning equipment demo program, the DJGPP under DOS to complete the study underlying the development of PCI would be a great