Assembly Language Programming Basics

Microprocessors recognize and operate in binary numbers.

Word

The number of bits the microprocessor recognizes and processes at a time is called a word.

Byte

A group of eight bits is called a Byte.

Nibble

A group of four bits is called a Nibble.

Instruction

To communicate with a microprocessor we must give instructions in machine language(binary language). Each combination of bit patterns that have given a specific meaning is called an instruction.(operation code/ opcode)
It instructs the microprocessor to perform a specific function.

Mnemonic

Since it is difficult to write instructions in binary(or hexadecimal), computer manufacturers have created English-like words to represent the binary instructions. Symbolic code for representing an instruction is called a mnemonic.

Assembler

Programs written using these words(mnemonic) are called assembly language programs. Programs written in assembly language is translated into machine language using a program called an assembler.

machine language mnemonic instruction assembler assembly language programming basics
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