Briefly Explain The Pointers And Index Group Of Registers.?

1.	Briefly Explain The Pointers And Index Group Of Registers.?
Answer» Stack pointer and base pointer are the TWO pointer REGISTERS whereas the Source index and DESTINATION index are the index group of registers. They are primarily used to store relative to segment registers the LOCATIONS of offset addresses of MEMORY locations. They serve the purpose of being memory pointers. The source index and destination index are also used as general purpose register. In such cases the SI and DI are implemented as source and destination index registers. In stacks, data areas might exist, to be able to access such data which contains the BP register.

Answer»

Stack pointer and base pointer are the TWO pointer REGISTERS whereas the Source index and DESTINATION index are the index group of registers.
They are primarily used to store relative to segment registers the LOCATIONS of offset addresses of MEMORY locations. They serve the purpose of being memory pointers.
The source index and destination index are also used as general purpose register. In such cases the SI and DI are implemented as source and destination index registers.
In stacks, data areas might exist, to be able to access such data which contains the BP register.

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