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WiiRd forum

Wii & Gamecube Hacking => Wii Game hacking help => Topic started by: live2play on February 26, 2012, 02:57:48 AM

Title: Convert WiiRD to ASM
Post by: live2play on February 26, 2012, 02:57:48 AM
Does anyone know what the code below is accomplishing?  I know that C0000000 00000004 indicates that the next four lines of instructions (ASM) are to be executed.  However, I can't get asmwiird to decode lines 2-4 into ASM.  Any help is greatly appreciated.

Code Select
C0000000 00000004
3D600000 3D80808A
398C3641 616B0001
916C101F 4E800020
4E800020 00000000
Title: Re: Convert WiiRD to ASM
Post by: Thomas83Lin on February 26, 2012, 03:35:34 AM
Quote from: live2play on February 26, 2012, 02:57:48 AM
Does anyone know what the code below is accomplishing?  -snip-
lis r11,0
lis r12,-32630
addi r12,r12,13889
ori r11,r11,1
stw r11,4127(r12)
blr
blr- why 2 blr's?

R12 = 808A0000+3641=808A3641
R11 = 00000001

store r11 to r12 +offset 101F

so write 1 to 808A4660

technically the code would be the same as
048A4660 00000001

edit: btw the asmwiird I'm using doesn't decode the C0 codetype either but just changing C0 to C2 in asmwiird allows it to decode it, just don't forget to change it back before applying.lol
Title: Re: Convert WiiRD to ASM
Post by: WiiOs-Ozelot on February 26, 2012, 10:05:48 AM
PyiiASMH append always blr's by C0 ^^
Title: Re: Convert WiiRD to ASM
Post by: Stuff on February 26, 2012, 02:46:28 PM
Someone was thinking too much XD.

The second blr is because "The instructions MUST end with with a blr", so the dude probably thought it had to end with 4E800020 00000000 like how C2 needs the 00s at the end. Again, too much thinking. The code could've been a little more tighter too(besides the 04 which would be best).

C0000000 00000002
li r11,1
lis r12, 0xffff808A
stw r11, 0x4660(r12)
blr

I guess whoever's code that is can learn from this maybe?
Title: Re: Convert WiiRD to ASM
Post by: Bully@Wiiplaza on February 27, 2012, 06:58:04 PM
Quote from: Stuff on February 26, 2012, 02:46:28 PMI guess whoever's code that is can learn from this maybe?
this was made on purpoise and not because it can be shorter. ;)
Title: Re: Convert WiiRD to ASM
Post by: live2play on February 28, 2012, 03:22:02 PM
What was the reason for the double blr?
Title: Re: Convert WiiRD to ASM
Post by: Bully@Wiiplaza on February 28, 2012, 05:07:14 PM
Quote from: live2play on February 28, 2012, 03:22:02 PM
What was the reason for the double blr?
this probably was just a fail :D
It´s not my code though but I´m having a guess whose it was xD
If you know, please send me the name in a PM.
Title: Re: Convert WiiRD to ASM
Post by: Stuff on February 28, 2012, 06:55:26 PM
hmm. Well how come there weren't any credits in the code?
Title: Re: Convert WiiRD to ASM
Post by: live2play on February 28, 2012, 08:43:13 PM
Quote from: Stuff on February 28, 2012, 06:55:26 PM
hmm. Well how come there weren't any credits in the code?

It is a snippet of a much larger code.
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