ITPEC FE Subject A April 2025 Question 9
ITPEC FE Subject A April 2025 — Question 9 of 60
Stack Pointer Register — the register used in push/pop (stack) operations.
The stack pointer (SP) stores the address of the top of the stack in memory.
- •
push→ writes data onto the stack and moves SP - •
pop→ reads data from the stack and moves SP back
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.
AI-generated — may contain errors
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