bits 64

    SECTION .data
; empty

    SECTION .text
global _start
_start:
    %include "header.asm.inc"
    
    mov    eax,0x42       ; immediate value is en-
    mov    eax,0x1234567  ;  coded in instruction 
    mov    eax,0xffff0000 ;  (little endian)

    mov    ebx,0x42     ; every registers has its
    mov    ecx,0x42     ;  own 32b `mov` opcode
    mov    edx,0x42     ;  (opcodes b8-bf)
    mov    esp,0x42
    mov    ebp,0x42
    mov    esi,0x42
    mov    edi,0x42

    mov    ax,0x42      ; prefix 0x66 changes size
    mov    bx,0x42      ;  of operand (32b to 16b)
    mov    cx,0x42
    mov    dx,0x42

    mov    al,0x42      ; prefix 0x66 changes size
    mov    bl,0x42      ;  of operand (32b to 16b)
    mov    cl,0x42
    mov    dl,0x42
    
    %include "sysexit.asm.inc"