mov		ecx, X
	mov		edx, 02h
	mov		eax, 03h
	mov		ebx, 00h
	int		80h
	mov		cx, [X]
	xor		cx, 01h
	mov		[X], cx
	mov		ecx, X
	mov		edx, 02h
	mov		eax, 04h
	mov		ebx, 01h
	int		80h
	mov		eax, 01h
	xor		ebx, ebx
	int		80h
section .data
	X	dw	0h