基于nios的1602显示处理，并不是io口模拟驱动的，而是用verilog写好的驱动程序-Nios display processing based on the 1602, not io port simulation-driven, but with drivers written verilog

这个程序的io板卡的pci驱动，可以实现io板卡的pci通讯-Io board of this program the pci driver, io board pci communication