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Can a computer directly recognize and execute programs written in assembly language?

青灯夜游
青灯夜游Original
2021-03-19 15:07:0129681browse

cannot. Programs written in assembly language cannot be directly recognized and executed by computers; the assembly language source program must be translated into a machine language program (i.e. target program) before it can be executed. When the target program is placed in a predetermined location in the memory, it can be processed and executed by the computer's CPU.

Can a computer directly recognize and execute programs written in assembly language?

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Assembly Language (Assembly Language) is any low-level language used for electronic computers, microprocessors, microcontrollers or other programmable devices, also known as symbolic language. In assembly language, mnemonics are used to replace the opcodes of machine instructions, and address symbols or labels are used to replace the addresses of instructions or operands.

Assembly language and machine language are similar in nature, except that machine language that is symbolized is still a language that depends on the machine. Compared with machine language, assembly language has considerable improvements in writing, modifying and reading, but it is still far from high-level languages.

A program written in assembly language cannot be directly recognized by the computer. The assembly language source program must be translated into a machine language program (called a target program) before it can be executed. In different devices, assembly language corresponds to different machine language instruction sets, which are converted into machine instructions through the assembly process.

Advantages of assembly language:

As a second-generation programming language above machine language, assembly language also has many advantages:

  • You can easily read the memory status and hardware I/O interface status

  • The code you write can be executed accurately because there are fewer compilation steps

  • As a low-level language, it is highly scalable

Disadvantages of assembly language:

  • Because the code is very monotonous and there are few special instruction characters, it makes the code lengthy and difficult to write.

  • Because the assembly still needs to call the memory to store the data, it is very difficult. BUGs are prone to occur, and debugging is not easy

  • Even if a program is completed, it will take a lot of time to maintain it later.

  • Because of the particularity of the machine, the defect of poor code compatibility is caused.

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