bus, the control unit issues a READ

bus, the control unit issues a READ command on the control bus, and the result
appears on the data bus and is copied into the memory buffer register (MBR).We
also need to increment the PC by the instruction length to get ready for the next instruction.
Because these two actions (read word from memory, increment PC) do
not interfere with each other, we can do them simultaneously to save time. The
third step is to move the contents of the MBR to the instruction register (IR).This
frees up the MBR for use during a possible indirect cycle.

ผลลัพธ์ (อังกฤษ) 2:

总线，控制单元发出读命令在控制总线上，结果
出现在数据总线和复制到内存缓冲寄存器（MBR）。我们
还需要增加电脑的指令长度准备好下一个指令。
因为这两个动作（读单词记忆，增加PC）做
互不干扰，我们可以做他们的同时节省时间。该
第三步是将MBR的内容到指令寄存器（IR）。这
释放了MBR可能间接循环中使用。