基于xilinx excd开发板的PS/2键盘计算器，能完成1位数据的加减乘除，功能可扩展-it s a ps/2 keyboard caculator

基于Verilog语言编写的简易计算器，实现了加减法的运算，有模块和约束文件。-Verilog language based on simple calculator, to achieve the operation of addition and subtraction, there are modules and constraint files.

fpga实现了计算器功能，代码烧到altera的板子上可直接运行，别的板子需要把.vhd文件复制并重新生成bit文件-Based on FPGA, I implement a caculator.