SECTION .data
    sum resb 2; assign two bytes

SECTION .text
global  _start

_start:
    mov eax,3
    mov ebx,5
    add eax,ebx
    mov [sum], eax   ;moves the value of eax to sum
    mov ecx,sum
    mov edx,1 ;number of bytes to show
    mov     ebx, 1      ; STDOUT file
    mov     eax, 4      ; SYS_WRITE (kernel opcode 4)
    int     80h

    mov eax,1
    int 80h