一个完整的带I/O和RAM，ROM的URISC,可以完成A+B/2的运算。实际上，通过对ROM的手工编程，可以实现8为数据的加减乘除，已经更加复杂的运算。-An ultimate URISC With I/Os, a RAM, a ROM,which can complete A+ B/2 calculations. In fact, through the ROM of the manual programming, it can do more calculations,such as A+B,A-B,A*B,A/B,and so on.