说明：  简单的数字电路设计，全部由分立的IC实现，实物已经做出过。实现两个四位二进制数相加，和一个四位二进制移位的功能。仿照MCU指令进行设计，有2位二进制操作码，8位输入和5位输出端，内部时钟控制电路。对于了解8位或者16位的MCU指令时序逻辑有点帮助.
(Simple digital circuit design, all of the IC to achieve the separation, in-kind has been made. The achievement of the two add up to four binary number, and a shift of four binary functions. MCU instruction modeled on the design, there are two binary opcode, 8 inputs and 5 outputs, the internal clock control circuit. For the understanding of 8 or 16-bit MCU instruction temporal logic to some extent.)