17 Questions
What is the purpose of the Stack Pointer (SP) in 8086 microprocessor?
To access data in the stack segment as an offset from SS
Which register is used in 8086 microprocessor for based addressing mode?
Base Pointer (BP)
In indexed addressing, which registers are used together with DS and ES?
Source Index (SI) and Destination Index (DI)
What happens to SP contents due to the execution of POP or PUSH instructions?
SP contents are automatically updated by incrementing/decrementing
Which register is used as an offset from the current SS in instructions involving the stack segment?
Stack Pointer (SP)
What does the 8086 microprocessor do if a condition is not zero?
Branches to label START
Which register always points to the next instruction to be executed within the currently executing code segment?
Instruction Pointer
In based addressing mode, what is used to calculate the 20-bit physical stack address?
Base Pointer (BP)
What is the role of the Base Pointer (BP) in stack instructions?
Calculates physical stack address in based addressing mode
Which register is used along with Extra Segment (ES) to determine the 20-bit physical address for the destination in string instructions?
Destination Index (DI)
What is the main function of the Stack Pointer (SP) in 8086 Microprocessor?
Calculates the 20-bit physical stack address
The Counter Register (CX) is used as an offset for computation of which type of physical address?
Stack address
What does the processor do each time it wants to access memory?
Takes the segment register value, shifts it one hexadecimal place to the left, and adds the required offset.
Which register is used for code or instruction address purposes?
BX
What is the purpose of Stack Pointer (SP)?
Stack address
In the context provided, what is meant by 'Segment : Offset'?
Combination of a segment register and an offset to form a memory address
Which combination of registers is used for string source address purposes?
BX, DI, SI
Test your knowledge on the Execution Unit (EU) architecture and registers of the 8086 Microprocessor. Check if you can understand instructions involving the stack segment, Stack Pointer (SP), Base Pointer (BP), and branching conditions in the 8086 processor.
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