说明：  含近百个源码的VHDL与Verilog相对照的很不错的资料，内容涵盖了从基本说明到高级设计案例，有很强的实用性，值得一看。
(Containing hundreds of VHDL and Verilog source contrast is very good information, which covers from basic instructions to advanced design of the case, there are strong practical, worth a visit.)