Assignment on assembly_array

org 100h

.DATA
   arr dw 1,2,3,4,5,6,7,8
   n   dw 8  ;the size of array
   n1  dw 4  ;first half of the array index
   t_sum dw 0

 .code
    proc main
    mov cx,n
    mov dx,0
    mov si,0

    ;push array element into the stack
    st:
    mov ah,2
    mov dx,arr[si]
    add dx,48
    push dx
    add si,2
    loop st
    call rev_show ;call the reverse proc
    call sum      ;call the sum proc
    call mult     ;call mult proc
    endp





    ;show the array element in to reverse order
    proc rev_show
        mov si,0
        mov cx,n
        add sp,2
        revst:
        pop bx
        mov arr[si],bx
        mov dx,arr[si]
        int 21h
        mov dx,' '
        int 21h
        sub arr[si],48
        add si,2
        loop revst
     endp rev_show


    ;sum proc
    proc sum
      mov si,0
      mov cx,n1
      mov ax,0
      sum_up:
      add ax,arr[si]
      add si,2
      loop sum_up
      mov t_sum,ax ;store the value of ax in a t_sum
    endp sum


   ;mult proc
   proc mult
       mov cx,n1
       mov ax,1
       mul_up:
       mul arr[si]
       add si,2
       loop mul_up:
   endp mult

   ;move in to the register
   mov bx,ax
   mov ax,t_sum