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Assembler Directives of 8086 Microprocessor Video Lecture - Computer Science Engineering (CSE)

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FAQs on Assembler Directives of 8086 Microprocessor Video Lecture - Computer Science Engineering (CSE)

1. What are assembler directives in 8086 microprocessor?
Ans. Assembler directives in 8086 microprocessor are special instructions used in assembly language programming to provide additional information to the assembler. These directives do not generate machine code instructions but assist the assembler in performing tasks like defining constants, reserving memory, or including libraries.
2. How are assembler directives different from instructions in 8086 microprocessor?
Ans. Assembler directives and instructions in 8086 microprocessor are different in their purpose and functionality. Instructions are the actual machine code instructions that the microprocessor executes, while assembler directives are instructions given to the assembler during the assembly process. Assembler directives do not generate machine code instructions but help in defining data, reserving memory, or performing other assembly-related tasks.
3. What are some commonly used assembler directives in 8086 microprocessor programming?
Ans. Some commonly used assembler directives in 8086 microprocessor programming include: - ORG: Specifies the origin or starting address for the program. - DB: Declares a byte and initializes it with a value. - DW: Declares a word (two bytes) and initializes it with a value. - DS: Declares a data segment and reserves memory for data storage. - ENDP: Marks the end of a procedure. - INCLUDE: Includes an external assembly file in the current program.
4. How can the ORG directive be used in 8086 microprocessor programming?
Ans. The ORG directive in 8086 microprocessor programming is used to specify the origin or starting address for the program. It allows the programmer to control where the program's instructions and data will be placed in memory. By using the ORG directive, the programmer can ensure that the program is loaded and executed from the desired memory location.
5. Can assembler directives be used in high-level programming languages like C or Java?
Ans. Assembler directives are specific to assembly language programming and are not directly applicable to high-level programming languages like C or Java. High-level languages have their own syntax and constructs for achieving similar functionalities as assembler directives. For example, in C, constants can be defined using the "const" keyword, memory allocation can be done using dynamic memory allocation functions, and libraries can be included using the "#include" directive.
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