What Is The Importance Of Assembler Directives In 8086 And Explain Them Briefly?

An assembler directive is a

statement to give direction to the assembler to perform task of the assembly process

. It control the organization if the program and provide necessary information to the assembler to understand the assembly language programs to generate necessary machine codes.

What is the significance of assembler directives?

Assembler directives

supply data to the program and control the assembly process

. Assembler directives enable you to do the following: Assemble code and data into specified sections. Reserve space in memory for uninitialized variables.

Which of the following is assembler directive in 8086?

Assembler Directives of 8086. It

provides information to the assembler regarding the name of the program or data segment for that particular segment

. This directive specifies that the instruction of the source program is stored in logical segment _DONE.

Which of the following are the assembler directives?

• Assemble code and data into specified sections.
• Reserve space in memory for uninitialized variables.
• Control the appearance of listings.
• Initialize memory.
• Assemble conditional blocks.
• Define global variables.
• Specify libraries from which the assembler can obtain macros.

What are the five assembler directives?

• Assemble code and data into specified sections.
• Reserve space in memory for uninitialized variables.
• Control the appearance of listings.
• Initialize memory.
• Assemble conditional blocks.
• Define global variables.
• Specify libraries from which the assembler can obtain macros.

What are assembler directives give example?

Directives are instructions used by the assembler to help automate the assembly process and to improve program readability. Examples of common assembler directives are

ORG (origin), EQU (equate), and DS. B (define space for a byte)

.

What is meant by assembler directives give example?

Assembler directives are

instructions that direct the assembler to do something

. … This is used to set the program or register address during assembly. For example, ORG 0100h tells the assembler to assemble all subsequent code starting at address 0100h. DS. Defines an amount of free space.

Which assembler directive is used in FAR procedure?

The

PROC directive

is used to identify the start of a procedure. The PROC directive follows a name you give the procedure. After the PROC directive, the term near or the term far is used to specify the type of the procedure.

What is DB directive?

The DB directive is

the most widely used data directive in the assembler

. It is used to define the 8-bit data. When DB is used to define data, the numbers can be in decimal, binary, hex, or ASCII formats.

Which directive is used to define constants?

The %define Directive

The above code replaces PTR by [EBP+4]. This directive also allows redefinition and it is case-sensitive.

What are directives in 8086?

Introduction: Assembler directives are

the directions to the assembler which indicate how an operand or section of the program is to be processed

. These are also called pseudo operations which are not executable by the microprocessor.

Which of the following assembler directives are used to define a procedure?

Explanation: The assembler directive that are used for defining a procedure in the 8086 microprocessor are:

PROC and ENDP

.

Which directive ends a procedure?

The ENDP directive

marks the end of the main procedure.

What are arm directives?

What is Ltorg statement?

Use the LTORG instruction so

that the assembler can collect and assemble literals into a literal pool

. A literal pool contains the literals you specify in a source module either after the preceding LTORG instruction, or after the beginning of the source module.

What are the different types of assemblers used?

• 6502 assemblers.
• 680×0 assemblers.
• ARM assemblers.
• IBM mainframe assemblers.
• POWER, PowerPC, and Power ISA assemblers.
• x86 assemblers.
• x86-64 assemblers.
• Z80 assemblers.