What is label in 8086?

A label can be placed at the beginning of a statement. During assembly, the label is assigned the current value of the active location counter and serves as an instruction operand. There are two types of lables: symbolic and numeric.

What is a label in assembly coding?

A label in a programming language is a sequence of characters that identifies a location within source code. In assembly language labels can be used anywhere an address can (for example, as the operand of a JMP or MOV instruction).

How many bits in AX register how can use it as 8 bits register?

AX – This is the accumulator. It is of 16 bits and is divided into two 8-bit registers AH and AL to also perform 8-bit instructions.

What is label in microprocessor?

A label is a symbol that represents the memory address of an instruction or data. The address can be PC-relative, register-relative, or absolute. Labels are local to the source file unless you make them global using the EXPORT directive. The address given by a label is calculated during assembly.

What is a label and how does the assembler differentiates between code labels and data labels?

A label merely names a single point in either code or data. Labels are used to name the entry point of a subroutine, to name the beginning of some data, to name points in the code for construction of control flow constructs, like if-then-else, while-do..

What is instruction set descriptor?

An instruction set, or instruction set architecture (ISA), is a list of all the commands (instructions), with all their variations, that a processor can execute. Instructions include: Arithmetic such as add and subtract. Logic instructions such as and, or, and not.

What is the full form of AX register & explain its working?

AX is usually called accumulator register, or just accumulator. Most of arithmatical operations are done with AX. Sometimes other general purpose registers can also be involved in arithmatical operation, such as DX. The register BX is usually called base register. The common use is to do array operations.

How many bits does the AX register uses?

For example, in multiplication operation, one operand is stored in EAX or AX or AL register according to the size of the operand. BX is known as the base register, as it could be used in indexed addressing. CX is known as the count register, as the ECX, CX registers store the loop count in iterative operations.