设计一个模型机，具体设计要求如下：
（1）设计指令系统，要求有取数指令、加法指令、跳转指令、停机指令等
（2）设计指令格式、微指令格式 、微程序 、时序电路 、数据通路，完成cpu的设计。
（3）利用模块化设计，分别设计存储器模块、运算器模块、时序电路模块、微程序控制器模块、显示模块等，最后进行系统的顶层设计，完成复杂模型机的设计与实现测试
（4）根据任务，完成主程序的设计，同时把主程序翻译成目标代码，写入主存，仿真下载测试。(Design a model machine, the specific design requirements are as follows: (1) design instruction system, required to have number instructions, addition instructions, jump instructions, downtime instructions and so on (2) Design instruction format, micro-instruction format, micro-program, time series circuit, data path, complete the design of the CPU. (3) The use of modular design, respectively design memory module, operator module, time series circuit module, microcontroller Controller module, display module, etc., and finally carry out the top layer design of the system, complete the design and implementation of complex model machine test (4) According to the task, complete the design of the main program, while translating the main program into the target code, Write the deposit, simulation download test.)