section .multiboot_header
header_start:
	dd 0xe85250d6				 ; magic number (multiboot 2)
	dd 0					     ; architecture 0
	dd header_end - header_start ; header length
	; checksum
	dd 0x100000000 - (0xe85250d6 + 0 + (header_end - header_start))

    ; insert optional multiboot tags here

    ; required end tag
    dw 0    ; type
    dw 0    ; flags
    dd 8    ; size
header_end: