ubuntu安装verilog
http://blog.csdn.net/u011002599/article/details/15503827
Ubuntu下icarus verilog仿真实例
http://blog.csdn.net/lovehuishouzan/article/details/52330636
http://blog.163.com/jacky_z/blog/static/22508213520138227659293/
http://blog.csdn.net/adream307/article/details/7686033
https://wenku.baidu.com/view/6365aefbb7360b4c2f3f6471.html
https://wenku.baidu.com/view/6cb9b9d1580216fc710afd21.html