一、 Bus
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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
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- 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
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3)打断后的操作
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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
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- 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