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Questions and Answers
What is the purpose of the Stack Pointer (SP) in 8086 microprocessor?
What is the purpose of the Stack Pointer (SP) in 8086 microprocessor?
- To differentiate between source and destination addresses in data string processing
- To store the offset address in the current SS for based addressing mode
- To automatically update BP contents during instruction execution
- To access data in the stack segment as an offset from SS (correct)
Which register is used in 8086 microprocessor for based addressing mode?
Which register is used in 8086 microprocessor for based addressing mode?
- Source Index (SI)
- Destination Index (DI)
- Base Pointer (BP) (correct)
- Stack Pointer (SP)
In indexed addressing, which registers are used together with DS and ES?
In indexed addressing, which registers are used together with DS and ES?
- Source Index (SI) and Destination Index (DI) (correct)
- Base Pointer (BP) and Counter Register (CX)
- Stack Pointer (SP) and Base Pointer (BP)
- Source Index (SI) and Stack Pointer (SP)
What happens to SP contents due to the execution of POP or PUSH instructions?
What happens to SP contents due to the execution of POP or PUSH instructions?
Which register is used as an offset from the current SS in instructions involving the stack segment?
Which register is used as an offset from the current SS in instructions involving the stack segment?
What does the 8086 microprocessor do if a condition is not zero?
What does the 8086 microprocessor do if a condition is not zero?
Which register always points to the next instruction to be executed within the currently executing code segment?
Which register always points to the next instruction to be executed within the currently executing code segment?
In based addressing mode, what is used to calculate the 20-bit physical stack address?
In based addressing mode, what is used to calculate the 20-bit physical stack address?
What is the role of the Base Pointer (BP) in stack instructions?
What is the role of the Base Pointer (BP) in stack instructions?
Which register is used along with Extra Segment (ES) to determine the 20-bit physical address for the destination in string instructions?
Which register is used along with Extra Segment (ES) to determine the 20-bit physical address for the destination in string instructions?
What is the main function of the Stack Pointer (SP) in 8086 Microprocessor?
What is the main function of the Stack Pointer (SP) in 8086 Microprocessor?
The Counter Register (CX) is used as an offset for computation of which type of physical address?
The Counter Register (CX) is used as an offset for computation of which type of physical address?
What does the processor do each time it wants to access memory?
What does the processor do each time it wants to access memory?
Which register is used for code or instruction address purposes?
Which register is used for code or instruction address purposes?
What is the purpose of Stack Pointer (SP)?
What is the purpose of Stack Pointer (SP)?
In the context provided, what is meant by 'Segment : Offset'?
In the context provided, what is meant by 'Segment : Offset'?
Which combination of registers is used for string source address purposes?
Which combination of registers is used for string source address purposes?
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