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This article mainly introduces the meaning of computer instructions, the article is very detailed, has a certain reference value, interested friends must read it!

Computer instruction is the basic operation that the computer can realize, and it is the instruction and command to direct the work of the machine. Instruction system is the language system of computer hardware, which refers to the collection of all instructions that the computer can execute. It describes all the control information and "logical judgment" ability in the computer.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

What are computer instructions?

Computer instructions are the instructions and commands that direct the work of the machine, the program is a series of instructions arranged in a certain order, and the process of executing the program is the working process of the computer.

Usually an instruction includes two aspects: the opcode and the Operand, the opcode determines the operation to be completed, and the Operand refers to the data participating in the operation and the address of the unit in which it is located.

In a computer, operation requirements and Operand addresses are represented by binary numbers, called opcodes and address codes, respectively, and the whole instruction is stored in memory in the form of binary coding.

What is a computer instruction system?

Instruction system is the language system of computer hardware, which refers to the collection of all instructions that the computer can execute. It describes all the control information and "logical judgment" ability in the computer.

The instruction systems of different computers also contain different types and numbers of instructions. Generally, it includes arithmetic operation type, logic operation type, data transmission type, decision and control type, shift operation type, bit (bit string) operation type, input and output type and so on. Instruction system is an important factor to characterize the performance of a computer. Its format and function not only directly affect the hardware structure of the machine, but also directly affect the system software and the scope of application of the machine.

Instruction system is the main interface of software and hardware, which reflects the basic functions of computer. From the point of view of system structure, it is the main property of computers seen by system programmers.

Therefore, the instruction system not only represents the basic function of the computer, but also determines the capability required by the machine, the format of the instruction and the structure of the machine. The purpose of designing an instruction system is to choose whether some basic operations in the computer system (including operating systems and high-level languages) should be implemented by hardware or software, and whether some complex operations should be implemented by a special instruction. or by a series of basic instructions, and then determine the instruction format, type, operation and access to the operands of the instruction system.

The above is all the contents of this article "what does computer instruction mean?" Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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