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The stack in the 8086/8088 microprocessor, like that in many microprocessors, is a region of memory that can store information for later retrieval. It is called a stack, because you "stack" things on it. The philosophy is that you retrieve (pop) things in the opposite order of storing (push) them. In the 8086/8088, the stack pointer is SS:SP, which is a 16 bit pointer into a 20 bit address space. It, at any point of time, points to the last item pushed on the stack. If the stack is empty, it points to the highest address of the stack plus one. In a push operation, the SP register is decremented by two, and the data to be pushed is stored at that address, low order byte first. In a pop operation, the data to be popped is retrieved from that address, again low order byte first, and then the SP register is incremented by two. Some instructions, such as a FAR CALL, or FAR RETURN push or pop more than two bytes on the stack. It is also possible to allocate temporary storage on the stack. You simply decrement the SP register by some amount, use that memory, and then increment the SP register to release the memory. This is known as a stack frame. In fact, the BP register makes is very easy to do so. You use BP to separate arguments from local data - arguments will be above BP, and local data will be below BP. Memory reference instructions that are relative to BP, i.e. [BP+6] or [BP-48] will automatically use the SS segment register.
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Explain The merits of using a deque to implement a stack in data structure?
Explain The merits of using a deque to implement a stack in data structure
Explain difference 8085 and 8086 in detail?
a number (1) because 8085+1=8086
What is the position of the stack pointer after the pop instruction in Intel's 8085 and 8086?
In Intel's 8085 microprocessor, the stack pointer (SP) is decremented by 2 after a POP instruction, as it retrieves a 16-bit value from the stack. In the 8086 microprocessor, the stack pointer is decremented by 2 as well, due to the same reason of retrieving a 16-bit word from the stack. Thus, in both architectures, the stack pointer points to the next available address in the stack after the POP operation.
Which register can be changed directly using pop instruction in 8086?
stack segment register
What is the SP pointing register's default memory segment?
The default segment for SP (Stack Pointer) relative memory accesses in the 8086/8088 is SS (Stack Segment).
Explain with netdiagram architecture of 8086 microprocessor?
i dont know the answer
How many base registers are there in 8086?
There are four base registers in the 8086/8088; Code Segment (CS), Data Segment (DS), Stack Segment (SS), and Extra Segment (ES).
List the unconditional branch instructions in 8086 with examples and explain?
jmp
What is the basic difference between instruction RET and IRET in 8086 microprocessor?
RET pops the PC off of the stack, while IRET pops both the flags and the PC off of the stack.
8086 microprocessor how its register help to dealing with stack?
The 8086 microprocessor uses several registers to manage the stack, primarily the Stack Pointer (SP) and the Base Pointer (BP). The SP register points to the top of the stack, allowing the processor to access stack data efficiently as it grows and shrinks with push and pop operations. The BP register is often used for referencing local variables in stack frames during procedure calls, facilitating organized access to parameters and return addresses. Together, these registers enable effective stack management for function calls and local data storage.
Write a sequence of instruction to exchange two register contents using stack in 8086 processor?
To exchange two registers, say the BX and CX registers, in the 8086 using the stack, you can use...PUSH BXPUSH CXPOP BXPOP CX... Of course, this is for 16 bit operation. If you want 8 bit operation, you will need to do more than that, because stack operations are always 16-bit operations.
How 8086 responds to an interrupt?
When the 8086 microprocessor receives an interrupt signal, it completes the execution of the current instruction and saves the address of the next instruction onto the stack. It then determines the appropriate interrupt vector from the Interrupt Vector Table (IVT) based on the interrupt type. The processor then transfers control to the interrupt service routine (ISR) associated with that interrupt. After the ISR has executed, the 8086 retrieves the saved address from the stack and resumes execution from where it was interrupted.
