.file	"key_onoff.c"
	.text
	.align	2
	.global	_start
	.type	_start,function

_start:
	mov	r0, #0x4000000
	ldr	r0, [r0, #0x130]	@ r0 = read_io(0x4000130) 
	ldrh	r1, [pc, #0x3c]		@ r1 = 0x384 key:L+R+D+SEL 
	ldrh	r2, [pc, #0x3a]		@ r2 = 0x3ff
	and	r0, r0, r2		@ r0 = r0 & 0x3ff
	ldr	r2, [pc, #0x34]		@ r2 = static_addr(isOn)
	ldrb	r3, [r2]		@ r3 = *isOn

	cmp	r0, r1
	beq	_mark
					@ if r0 != key
	ands	r1, r3, #0x10
	andne	r3, r3, #0xf
	strneb	r3, [r2]		@ if r3 & 0x10 then *isOn = r3 & 0xf end

_final:
	cmp	r3, #0
	bne	_next
	bx	lr

_mark:					@ else // r0 == key
	ands	r1, r3, #0x10
	eoreq   r3, r3, #0x11
	streqb	r3, [r2]		@ if r3 & 0x10 == 0 then *isOn = !r3 | 0x10 end
	b	_final

_const:
	.long	0x03ff0384
	.long	0

_next:
	.long	0xFFFFFFFF