# not-incredibly-bloated exi code copied from kenobiwii.s (which is for PPC).
# If I use this code with the custom ios toolkit (i.e. from c: exisendbuf(4, "hello")), it randomly either works or sends crap to the gecko.
# The old thumb version was a lot more reliable, for some reason.  Maybe just because it was slower? that doesn't really make sense
.globl _main
.arm
_main:
exisendbuf:
	cmp r0, #4
	bxne lr
	mov r3, r1
	# r3 is the string...
loop:
	ldrb r0, [r3] ;# ldrsb doesn't do what I think
	add r3, r3, #1 ;# but this could be a postindex
	cmp r0, #0
	bxeq lr
exisendbyte:
	# r0 should be the byte.
	# r0..r2 get clobbered
	mov r2, #0xB0000000
	orr r2, r2, r0, LSL #20
	# r2 is now 0xB0000000 + (sendbyte<<20)
	mov r1, #0x0d000000 ;# s/d0/d8 fails, but according to Starlet_Memory_Map it should be the same
	add r1, r1, #0x6800
	# r1 is 0x0d006800
	mov r0, #0xd0
	str r0, [r1, #0x14]
	str r2, [r1, #0x24]
	mov r0, #0x19
	str r0, [r1, #0x20]
exicheckreceivewait:
	ldr r0, [r1, #0x20]
	and r0, r0, #1
	cmp r0, #0
	bne exicheckreceivewait

	ldr r2, [r1, #0x24]
	str r0, [r1, #0x14]
	lsl r2, r2, #26 ;#did it work?
	and r0, r2, #1
	b loop