选用一种设计方案定制ROM（乘法器宏模块）的方法设计一个八位乘法器，利用quartus软件进行VHDL程序的编写，然后对程序进行仿真验证，并对所设计的乘法器进行评价。-Use a custom ROM design ( multiplier macro module ) method to design a eight multiplier, the use of quartus software VHDL program, then the program is validated by simulation, and the design of the multiplier is evaluated.