%define MULTIBOOT_HEADER_MAGIC 0x1BADB002
%define MULTIBOOT_HEADER_FLAGS 0x3

[global start]
[global _start]
start:
_start:
	jmp	multiboot_entry
	align 4

multiboot_header:
	; magic
	dd	MULTIBOOT_HEADER_MAGIC
	; flags
	dd	MULTIBOOT_HEADER_FLAGS
	; checksum
	dd	-(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)

multiboot_entry:
	mov ax, 0x0700 + 'J'
	mov [0xB8000+160*10+2*2], ax

looplbl:
	hlt
	jmp looplbl