Verilog-r2-wangzhengxiong

说明：  学些verilog语言的入门书籍，由汪正雄编写，内容挺全的，可以作为初学者的手册。
(up some Verilog language entry books, prepared by Hongzhengxiong, as Ting-wide and can serve as a beginner's manual.)