Assembly Language: Difference between revisions

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Only the x86 instruction set is mostly described here.

Basics

What is Assembly Language

Assembly language is a low-level programming language for a computer or other programmable device.

What is the difference between the Assembly language and high-level programming languages

Each assembly languages is specific for a given computer architecture (instruction set).

High level programming language are mostly portable across multiple systems.

How is the source code of an high-level programming language converted to the executable machine code

Via a Compiler

How is the source code of an assembly language converted to the executable machine code

Via an Assembler

List examples of some assemblers

NASM, MASM.

Why Assembly languages exist?

Each computer has a microprocessor with arithmetical, logical and control activities.

Each family of processors has its own set of instructions.

Processors understands only machine language instructions, which are ones and zeros. But develop software only using ones and zeros is too hard and complex. As the solution there are the assembly languages for each the instruction sets, instructions are represented with symbolic code and a more understandable form.

Advantages of understanding the assembly language

You will know:

How applications communicate with the operating system, processor and BIOS
The ways, data is represented in memory and other external devices
Access and execution of instructions by the processor
Access and processing data by instructions

Advantages of the assembly language

Less RAM

Less execution time

Suitable for time-critical jobs

External links

https://www.tutorialspoint.com/assembly_programming/index.htm

@@ Line 7: / Line 7: @@
 === What is the difference between the Assembly language and high-level programming languages ===
-Each assembly language is specific for a given computer architecture (instruction set).
+Each assembly languages is specific for a given computer architecture (instruction set).
 High level programming language are mostly portable across multiple systems.
@@ Line 25: / Line 25: @@
 Each family of processors has its own set of instructions.
-Processors understands only machine language instructions, which are ones and zeros. But develop software unly using ones and zeros is too hard and complex. As the solution there are the assembly languages for each the instruction sets, instructions are represented with symbolic code and a more understandable form.
+Processors understands only machine language instructions, which are ones and zeros. But develop software only using ones and zeros is too hard and complex. As the solution there are the assembly languages for each the instruction sets, instructions are represented with symbolic code and a more understandable form.
 === Advantages of understanding the assembly language ===