Computer System, Computer Science, Hardware.
world\n” string from memory to the register file, and from there to the display device, where they are displayed on the screen. shell将键盘输入的字符逐个读取到寄存器，再放入主存。 2. shell从磁盘加载可执行程序文件（可以通过DMA技术不走CPU直接加载到主存） 3. 加载完成后CPU执行main程序中的机器语言指令，开始执行程序。 An important lesson from this simple example is that a system