ITPEC FE Morning April 2023 Question 11
ITPEC FE Morning April 2023 — Question 11 of 80
Stack Pointer Register — the register used for push/pop operations.
The stack pointer (SP) holds the address of the top of the stack in memory.
- •push → decrements SP, writes data to the new top
- •pop → reads data from the top, increments SP
Why not others:
- (a) Instruction register — holds the currently executing instruction
- (b) Program counter — holds the address of the next instruction to fetch
- (d) Status register — holds condition flags (zero, carry, overflow, etc.)
Key rule: Push/pop = stack operations → the dedicated register is always the stack pointer.
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