15 Questions
What is the purpose of the PROC directive in assembly language?
The PROC directive is used to identify the start of a procedure.
How is the type of procedure specified after the PROC directive?
The type of procedure is specified using the terms 'near' or 'far' after the PROC directive.
What does the FAR term indicate when used with the PROC directive?
The FAR term indicates that the procedure is located in a segment with a different name from the one that contains the calling instructions.
How is the ENDP directive used in assembly language?
The ENDP directive is used to indicate the end of a procedure to the assembler.
What is the purpose of using the ENDP directive along with the PROC directive?
The ENDP directive, along with the PROC directive, is used to 'bracket' a procedure.
Explain the purpose of the INT instruction in BIOS or DOS.
The INT instruction is used to invoke subroutines within BIOS or DOS by saving CS:IP and flags on the stack and going to the subroutine associated with the specified interrupt number.
What is the format of the INT instruction and what is the range of the interrupt number?
The format of the INT instruction is INT xx, where xx is the interrupt number in the range of 00-FFH, providing a total of 256 interrupts.
What are the widely used interrupts associated with INT 10H and INT 21H used for?
INT 10H is used for screen video communication, while INT 21H is used for requesting various services from DOS.
Explain the requirements for using the services of INT 10H and INT 21H.
Before requesting the services of INT 10H and INT 21H, certain registers must have specific values depending on the function being requested.
What is the function of INT 10H Function 06 and what are the specific register values required for this function?
INT 10H Function 06 is used for scrolling the window and clearing it. The specific register values required are AL for the number of lines to scroll, BH for the attribute of blank rows, CH and CL for the upper row and left column, and DH and DL for the lower row and right column.
What is the purpose of the PROC directive in assembly language?
The PROC directive is used to identify the start of a procedure.
How is the type of procedure specified after the PROC directive?
The type of procedure is specified by using the term near or the term far after the PROC directive.
What does the FAR term indicate when used with the PROC directive?
The FAR term indicates that the procedure is located in a segment with a different name from the one that contains the instructions which call the procedure.
What is the purpose of the ENDP directive in assembly language?
The ENDP directive is used to indicate the end of a procedure to the assembler.
How is the ENDP directive used in conjunction with the PROC directive?
The ENDP directive is used with the PROC directive to 'bracket' a procedure.
Test your knowledge of PROC (PROCEDURE) directive in assembly language programming with this quiz. Explore the usage and syntax of PROC directive, as well as its role in defining and organizing procedures within a program.
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