What do You mean by program control and stack pointer.

Program control and stack pointer:

Program Control: Program control is a makes decisions or organizes its activities. Program control typically involves executing particular code based on the outcome of a prior operation or a user input.

Stack Pointer(SP): This is stack pointer register pointing to program stack. It is used in conjunction with SS for accessing the stack segment .

1. Always points to top item on the stack.
2. Offset address relative to SS.
3. Always points to word ( byte at even address).
4. An empty stack will had SP= FFFEh .