这是bochs虚拟机内部的源代码的分析，只涉及到cpu的部分，包括取指，译指，指令执行等，希望对大家有用。-This is a virtual machine inside the bochs source code analysis, only the part related to the cpu, including fetch, translated means, instruction execution, and I hope useful.

实现一个16位CPU。该CPU使用精减指令集，是一个五段流水线的结构。包括取指令(IF)、读寄存器(RD)、运算器(ALU)、内存读写(MEM)和写回(WB)。-The realization of a 16-bit CPU. Streamline the use of the CPU instruction set is a structure of five lines. Including fetch (IF), register read (RD), arithmetic logic u

First, the CPU must make access memory to fetch the instruction. The instruction contains the address of the data we want to load. During the execute phase accesses memory to load the data value located at that address for a total of two trips