1. Von Neumann structure
冯诺依曼第一次提出了“存储程序”，将指令以二进制的形式事先输入计算机主存储器，然后在从首地址开始一条一条的执行程序。
The first computer using von Neumann architecture EDAVC
input apparatus: converting the information into a form of a machine can be recognized by
the output device: converting the result into the familiar form of
arithmetic: arithmetic and logic operations
memory: store data and program
control Device : Command the program to run, analyze the program instructions in the memory
注意：软件和硬件在逻辑上是等效的，容易和效率的不同
to sum up:
1. The computer is composed of 5 major components
2. Instructions and data are stored in the memory with the same status and can be accessed by address
3. Instructions and data are expressed in binary
4. The instruction is composed of operation code and address code
5. Stored program
6, the operator center
It can be seen from the figure that the input data first enters the arithmetic unit and then enters the memory; similarly, the result can be output directly from the memory, but it needs to enter the arithmetic unit first, and the efficiency of the arithmetic unit is occupied to a certain extent when the result is output.
The structure of the current computer
以存储器作为中心
CPU = controller + arithmetic unit
The storage includes main storage and auxiliary storage. The auxiliary storage is a hard disk, which is an I/O device. Only when the app is running, will the app-related program data in the auxiliary storage be read into the main storage.
review:
