triforce.asm

	section .rodata
_A		db		'A', 0h
_SPACE	db		' ', 0h
_LINE	db		0Ah, 0h
	section .text
	global _start
_start:
	pop		edx
	pop		edx
	pop		edx
	call	_string_to_number
	inc		eax
	push	eax
	mov		edx, eax
	mov		ebx, eax
	xor		ecx, ecx
	add		ebx, eax
	sub		ebx, 2
	dec		edx
	inc		ecx
_first_triangle_repeat:
	push	edx
	push	ecx
	push 	ebx
	call	_repeat_space
	call	_repeat_a
	mov		eax, _LINE
	call	_draw_char
	pop		ebx
	pop		ecx
	pop		edx
	add		ecx, 2
	dec		ebx
	dec		edx
	jnz		_first_triangle_repeat
	pop		eax
	mov		edx, eax
	mov		ebx, ecx
	xor		ecx, ecx
	dec		edx
	sub		ebx, 2
	inc		ecx
_second_triangle_repeat:
	push	edx
	push	ecx
	push 	ebx
_second_triangle_repeat_space:
	mov		eax, _SPACE
	call	_draw_char
	dec		edx
	jnz		_second_triangle_repeat_space
	push	ecx
	call	_repeat_a
	call	_repeat_space
	pop		ecx
	call	_repeat_a
	mov		eax, _LINE
	call	_draw_char
	pop		ebx
	pop		ecx
	pop		edx
	add		ecx, 2
	sub		ebx, 2
	dec		edx
	jnz		_second_triangle_repeat
	xor		ebx, ebx
	mov		eax, 1
	int		80h
_string_to_number:
	xor		eax, eax
	mov		bl, byte[edx]
	sub		bl, '0'
	cmp		ebx, 9
	jbe		_repeat_this
	ret
_times_by_ten:
	imul	eax, 10
_repeat_this:
	add		eax, ebx
	inc		edx
	mov		bl, byte[edx]
	sub		ebx, '0'
	cmp		ebx, 9
	jbe		_times_by_ten
	ret
_draw_char:
	push	edx
	push	ecx
	push	ebx
	mov		ecx, eax
	mov		eax, 4
	mov		ebx, 1
	mov		edx, 1
	int		80h
	pop		ebx
	pop		ecx
	pop		edx
	ret
_repeat_a:
	mov		eax, _A
	call	_draw_char
	dec		ecx
	jnz		_repeat_a
	ret
_repeat_space:
	mov		eax, _SPACE
	call	_draw_char
	dec		ebx
	jnz		_repeat_space
	ret