global _start

section .text
_start:
	; input
	mov eax, 3
	xor ebx, ebx
	mov ecx, nya
	mov edx, 1
	int 0x80	
	
	; modification
	mov ax, word [nya]
	or ax, 0111b
	mov [nya], ax

	; output
	mov eax, 4
	mov ebx, 1
	mov ecx, nya
	mov edx, 1
	int 0x80
	
	; program exit
	mov     eax, 1 ; sys_exit = 1
	xor     ebx, ebx
	int     0x80

section .bss
nya resb 1