section .text
   global _start            ;must be declared for using gcc

_start:                     ;tell linker entry point
   mov    al, 5             ;getting 5 in the al
   mov    bl, 3             ;getting 3 in the bl
   or     al, bl            ;or al and bl registers, result should be 7
   add    al, byte '0'      ;converting decimal to ascii

   mov    [result],  al
   mov    eax, 4
   mov    ebx, 1
   mov    ecx, result
   mov    edx, 1
   int    0x80

outprog:
   mov    eax,1             ;system call number (sys_exit)
   int    0x80              ;call kernel

section    .bss
result resb 1