算术逻辑运算器单元ALU（74LS181）的工作原理。简单运算器的的数据传送通道。验算由74LS181等组合逻辑电路组成的运算功能发生器运算功能。 -Arithmetic logic operation unit ALU (74LS181) works. Simple arithmetic logic unit of the data transmission channel. 74LS181 checked by the combinational logic circuit, such