Kodewerx

Which one is this (AR DS) I'm trying to "press" the debug button with it...

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edit : see below post

How do you use this code?

I doubt you'll get very far with that method, as the value is likely to be overwritten before it's read again. Worth a shot, but don't be too disappointed.

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Indeed, this method I posted will get you nowhere because I don't set the debug button "On" but "Off"... (1=off, 0=on).

The "good" way to do it should be :

This will 'enable' the AND code type, use this code :
023FE424 E0033004 // Changes the D4 code type to AND
then use the D4 code type :
DA000000 027FFFA8 // Loads the 16 bits value at 0x027FFFA8
D4000000 0000DFFF // AND it with 0xDFFF
D7000000 027FFFA8 // Writes back the value at 0x027FFFA8

or

927FFFA8 DFFF2000 // If (the 16bits value at 0x027FFFA8 AND 0x2000) == 0x2000
DA000000 027FFFA8 // Loads the 16 bits value at 0x027FFFA8
D4000000 0000E000// ADD 0xE000 to it (= substracts 0x2000 from it)
D7000000 027FFFA8 // Writes back the value at 0x027FFFA8
D0000000 00000000 // Endif


And yes, the value gets overwritten by the ARM9, but what is important is that the code is executed before the value is readen by the ARM7 (which could be always the case with the AR's hook?)... And btw this method (writing directly to 027FFFA8) is what I used for the 'enable debug vcr' code for DQIV.

Hm, so some games do respond to that even when swiIsDebugger() returns false? Could be an interesting hack. Can AR patch ARM7 binaries? Those flags are only accessible by ARM7 and have to be copied somewhere for ARM9 to see, so there's probably only one read of the hardware register you could patch, and not have to worry about anything overwriting it.

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Erm I've mixed up ARM9/ARM7. I meant the data is written by the AR just after ARM7 wrote it, and before ARM9 reads it.

And yes, you can patch ARM7/ARM9 with the AR. Usually the NDS button data is copied at 0x027FFFA8, so setting a bpw on it (or a bpr on 0x04000136?) will be enough to find the ARM7 routine that writes it (and then being able to patch it).

I wanted, some time ago, to test the Debug button code for each and every game, but it sounded like too much work... For DQ I just got lucky : I looked at the ARM9 pad read routine for some reasons while hacking it, and I saw there was a "test" for the debug button value in it.

I still dont get it... Nothing happens...

What do you have to do to press the debug button?

I really want to do it...

Well, like I said, that method might not work in all games, and most games probably just won't respond to it.

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