Build a Stack.

This exercise is to understand stack operation in MASM. Build a stack by pushing $5$ data elements into stand and popping out the same data elements and display the values to user.

The code template is given below with the comments. Your task is to fill in the dotted lines of code, execute and show the results. You have to submit the running code, screen shot of the results and a brief $1$ paragraph description of the working of the program.

Template $-$

; Use the PUSH and POP instructions to display a list of $16-$bit$$

; integers in reverse order on the console.

; Uses indirect addressing with a loop.

$.$model small

$.$stack $100$h

$.$data

aList dw $100$h$,200$h$,300$h$,400$h$,500$h ; declare array $/$ list of data elements

$.$code

main proc

$..............$; init data segment$$

$............$ ; load cx register with the number of times to loop

$.........$; store si register with the offset of the data array

; Push the numbers.

L$1$: $...........$ ; move the data element into ax register

$$ push ax$$ ; push ax into stack

$...........$; increment the si pointer to nect data element in the array

$$ loop L$1$; loop to the next iteration

; Pop and display the numbers.

$..........$; load cx register with the number of times to loop

L$2$: pop$$ ax$$; pop from stack

$.........$ ; display in hexadecimal

$$ loop L$2$ ; loop to the next iteration

$$

main endp

end main

Helpful Syntax $-$

$1)$ How to write loops in MASM?

Load the number to iterate over the loop in CX register. The loop instruction automatically decrements cx$,$ and only jumps if cx $!=0.$

Example $-$

mov $$cx$,3$

myloop:

$$ ; Your loop content

$$ loop myloop

$2)$ How to store the offset of the array and mov over the array list for each iteration?

mov $$si$,$offset aList ;stores the address of the array into si register

mov $$ax$,[$si$]$ ; move the content at the address in the si register

add $$si$,$type aList$$ ;increment the address value in the si register to pint to the next element of the array