Processor systems material ACTIVITY 1 (45 points) Write a code to do following s

Question

Processor systems material
ACTIVITY 1 (45 points) Write a code to do following steps: 1. Initialize Stack Pointer at $20D. Attach a screenshot of the stack pointer's location (S points) 2. Push 4 hex values: Sdo, S11. S3e, and S82 into each of RAM locations $20A S20B, S20C, and $20D using stack pointer. Attach a screenshot where the values are stored after full PUSH operation. (10 points) 3. POP each stack location into correct registers. Attach a screenshot includig'all popped values from stack to registers. (10 points) Contents of $20A R19. Contents of $20BR18 Contents of $20C R17 Contents of $20DR16. 4. Attach your Flowchart (10 points) and Code (10 points) here.

Explanation / Answer

stack pointer

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. The most recently entered request always resides at the top of the stack, and the program always takes requests from the top.

A stack (also called a pushdown stack) operates in a last-in/first-out sense. When a new data item is entered or "pushed" onto the top of a stack, the stack pointer increments to the next physical memory address, and the new item is copied to that address. When a data item is "pulled" or "popped" from the top of a stack, the item is copied from the address of the stack pointer, and the stack pointer decrements to the next available item at the top of the stack.

contents of $20A--->R19

contents of $20B--->R18

contents of $20C--->R17

contents of $20D--->R16

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