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