The composition and function of computer

1. The composition of the computer:

Computer systems are divided into hardware systems and software systems:

1.1 Hardware system divided into: host and external equipment

A. Host is divided into: central processing unit (CPU) and primary (internal) memory

A1. CPU is divided into: arithmetic and controller

B. External equipment is divided into: input device, output device, external (auxiliary) memory

1.2 software system is divided into system software and application software

A. System software is divided into: operating system, language processor, advanced language system, service system

B. Application software is divided into: application software, user software

2. Function Description:

An arithmetic device: a part of a computer that processes data, including arithmetic operations (plus, minus, multiply, divide, etc.) and logical operations (with, or, non-, XOR, comparison, etc.)

Controller: Is the decision-making organ that publishes the command, coordinates and directs the operation of the whole computer system, consisting of program counter, instruction register, instruction decoder, timing generator and Operation Controller.

Memory: A part of a computer's memory or staging of data, all information in a computer, including raw input data. The initial processing of intermediate data and the final processing of useful information are stored in the memory. Furthermore, the various programs that command the computer's operation, that is, a set of instructions for how the input data is processed are also stored in the memory.

input Device: The input device is the device that input information to the computer. It is an important human-machine interface that converts the input information (including data and instructions) into binary code that can be recognized by the computer and feeds into the memory.

Output device: The output device is the device that outputs the computer's processing results. In most cases, it transforms these results into a form that is easy to identify.

Computer hardware: Refers to physical equipment, it is a computer system in the actual physical device collectively.

CPU: Used to perform various arithmetic and logical operations on the data, is the computer's execution unit.

Main memory: Also known as memory, directly connected to the CPU, is the computer's working memory, the computer is currently running programs and data must be stored in main memory. Fast access speed, but small storage capacity

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The composition and function of computer