Key Remapper; Chuck [Vega]

Nunchuck only.

This code allows you to select a Button (Button 1) that will activate another Button (Button 2). Button 1's original function is disabled. Button 2 still behaves normally.

XXXX = Button 1
YYYY = Button 2

X/Y Values:
0001 = Left
0002 = Right
0004 = Down
0008 = Up
0010 = +
0100 = 2
0200 = 1
0400 = B
0800 = A
1000 = -
2000 = Z
4000 = C
8000 = Home

NTSC-U Rev1
C225A274 00000007
881F005C 2C000001
4182000C 2C000006
40820020 3960XXXX
819F0000 7D805839
41A20010 7D8C5A78
618CYYYY 919F0000
382100C0 00000000

Code creator: Vega

#C2 Hooked Address (instruction right before blr of KPadRead)
#NTSC-U Launch 802596A4
#NTSC-U Rev1 8025A274
#PAL 8025AD70

#Symbols
.set ExtTypeOffset, 0x5C
.set ChuckDumpOffset, 0x0
.set ClassicDumpOffset, 0x60
.set A, 0x10
.set Y, 0x20
.set B, 0x40
.set Chuck, 0x1
.set Classic, 0x2
.set ChuckMPlus, 0x6
.set ClassicMPlus, 0x7

#Make sure classic controller is being used
#If not, SKIP code
#r31 = Ptr to KPADStatus Struct
check_kpad:
lbz r0, ExtTypeOffset (r31)
cmpwi r0, Chuck
beq- set_button_1
cmpwi r0, ChuckMPlus
bne- original_instruction

#Set Button 1
set_button_1:
li r11, 0x0400 #B used for assembling, adjust this to your needs

#Load current buttons
lwz r12, 0 (r31)

#Was Button 1 pressed?
and. r0, r12, r11
beq+ original_instruction

#Button 1 was pressed. Remove Button 1's value.
xor r12, r12, r11

#Place in Button 2's value
ori r12, r12, 0x1000 #Minus used for assembling, adjust this to your needs

#Write new buttons, end code
write_new_buttons:
stw r12, 0 (r31)

#Original Instruction; pop frame of KPadRead
original_instruction:
addi sp, sp, 0x00C0