1-Computer System Operation

一、 Bus

![image-20221224143316371](1-Computer System Operation/image-20221224143316371.png)

Execute concuurentlyy :并发

  • Memory Controller :为每个程序分配合适的内容保证他们的正常运行。

Some important Terms

![image-20221224143645797](1-Computer System Operation/image-20221224143645797.png)

  • load System and load OS kernel into memory

2)打断

  • 硬件的打断 —> Interrupt
  • 软件的打断 —->System Call (Monitor call)

Interrupt

  • Any time by sending a signal to the Cpu

What the fixed lOCATION

![image-20221224144156476](1-Computer System Operation/image-20221224144156476.png)

3)打断后的操作

![image-20221224161745360](1-Computer System Operation/image-20221224161745360.png)

先执行打断的程序,执行完毕后继续执行之前的内容。

二、存储结构

![image-20221224183423143](1-Computer System Operation/image-20221224183423143.png)

  • 寄存器 Registers
    • 以 位 的形式存储。最小的设备。
  • Cache
    • 比寄存器大
  • Main Memory
    • 随机存取储存器或 RAM
  • 辅助( secondly Memory )
    • Electronic Disk 电子磁盘
    • Magnetic Disk 磁盘
    • Optical Disk 光盘
    • Magnetic Tapes 磁带

Volatile :Loses its contents when power is removed
Non Volatile: Retains its contents even when power is removed

三、I/O Structure