16bit adder的verilog源代码和4bit的计数器源代码-source code for 16bit adder and 4bit counter

fpga应用开发简单的小工程，供初学者学习-fpga simple little application development projects, for beginners to learn

音乐计算器的设计与实现。完成加减与或比较计算，能显示进位借位零位，能根据结果的正负发出两首不同的音乐。(Design and implementation of music calculator. Complete addition and subtraction and comparison calculation, can display carry and borrow zero, can send out two different music according to the posi