What is the role of stack pointer in 8085?

For 8085: Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack. The stack pointer register in a computer is made available for general purpose use by programs executing at lower privilege levels than interrupt handlers.

Subsequently, one may also ask, what is the stack pointer used for?

A stack pointer is a small register that stores the address of the last program request in a stack. A stack is a specialized buffer which stores data from the top down. As new requests come in, they "push down" the older ones.

What is a register stack?

Stack registers in x86. In 8086, the main stack register is called stack pointer - SP. The stack segment register (SS) is usually used to store information about the memory segment that stores the call stack of currently executed program. SP points to current stack top.

What is meant by stack memory?

Stack Memory Segment. The stack memory segment is an area of memory allotted for automatic variables. Automatic variables are allocated and de-allocated automatically when program flow enters and leaves the variable's scope. Because of this process, stack allocation is simpler and typically faster than heap allocation.

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