是华为的vhdl教程，蛮有用的-Vhdl tutorial is Huawei, quite useless. . . . . . . . . . .

基于VHDL语言开发使用QUARTUS2软件的教程-QUARTUS2 Use Tutorial

The purpose of this tutorial is to describe the modeling language VHDL. VHDL includes facilities for describing logical structure and function of digital systems at a number of levels of abstraction, from system level down to the gate level. It i