https://es.wikipedia.org/wiki/Endianness

; Little-Endian ó Big-Endian
; Juan fary.
 
format PE Console 4.0
entry start
include 'win32ax.inc'
 
section '.data' data readable writeable
        numero          dw 1
 
        little_endian   db 'Little-Endian!',0
        big_endian      db 'Big-Endian!',0
 
section '.code' code readable writeable executable
start:
 
        mov al, byte[numero]
 
        cmp al,1
        jne Big
 
        invoke MessageBoxA,0,little_endian,0,MB_OK
        ret
 
        Big:
        invoke MessageBoxA,0,big_endian,0,MB_OK
        ret
 
 
section '.idata' import data readable writeable
    library User32,'User32.dll'
 
    import User32,\
           MessageBoxA,'MessageBoxA'