Hacking (Request) Could someone make a A9LH usable payload that turns off the 3ds when booted into?

[Deleted User]

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[dubbz82]

I don't see the purpose of this, though maybe i'm missing something??

 

[Deleted User]

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[Link.]

I don't see the purpose of this, though maybe i'm missing something??

Perhaps this?


But honestly, if you want to have the 3DS shut down on boot (for prank or other reasons), why don't you just remove the SD card? Arm9LoaderHax will shut the 3DS down upon boot if you do that.

Edited for formatting, but I see that the above suggestion won't work for you.

 

[Deleted User]

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[Zan']

I'm using a N3DS. I'm just trying to make it as safe as possible in case my sister comes around to destroy it

She could just drop it.
But I guess I get the point of this. I guess you could just use a faulty payload for the time being. Should just crash.

 

[zhdarkstar]

Actually, integrating Quick Shutdown into an A9LH boot manager as a way to prevent booting into 3DS Recovery Mode would be a useful feature for childproofing. I would like to see it added, as I plan on modding my cousins' 3DSes the next time I go over there.

 

[Wolfvak]

Could someone make a A9LH usable payload that turns off the 3ds when booted into?

Maybe make this a A9LH usable .bin? https://github.com/thedax/3DS_Quick_Shutdown/

It uses this main code:

#include <3ds.h>
#include <stdio.h>

// http://3dbrew.org/wiki/NSS:ShutdownAsync
void NSS_ShutdownAsync(void)
{
    Handle nssHandle = 0;
    Result result = srvGetServiceHandle(&nssHandle, "ns:s");
    if (result != 0)
        return;

    u32 *commandBuffer = getThreadCommandBuffer();
    commandBuffer[0] = 0x000E0000;

    svcSendSyncRequest(nssHandle);
    svcCloseHandle(nssHandle);
}

int main(int argc, char **argv)
{
    NSS_ShutdownAsync();

    // Hack: the 3ds crashes ("An error has occcurred.") for some reason
    // without one iteration of the APT main loop.
    aptMainLoop();
    return 0;
}

You can't do that, because FIRM doesn't exist yet when using A9LH.
If you give me a second I'll be able to upload a little payload that powers off the 3DS, but the gist of it is

i2cWriteRegister(DEVICE_MCU, 0x20, 1);

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Actually, integrating Quick Shutdown into an A9LH boot manager as a way to prevent booting into 3DS Recovery Mode would be a useful feature for childproofing. I would like to see it added, as I plan on modding my cousins' 3DSes the next time I go over there.

SaltFW does this by default now

 

[daxtsu]

Since the 3DS OS services aren't running during A9LH, it's not possible to adapt my shutdown homebrew. However, it's one line of code to turn the 3DS off (not counting the code that actually implements i2cWriteRegister):

i2cWriteRegister(I2C_DEV_MCU, 0x20, 1);

A bare-bones A9LH payload could easily be written to do it.

Edit: Ninja'd.

 

[Deleted User]

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[Wolfvak]

Thank you!

Done.
shutdown.bin is the main payload (precompiled), includes source.

 

[Deleted User]

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[daxtsu]

I applaud you kind Wolfvak! May I link this in OP? And THANK YOU!

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hmm... wasn't able to get it working. I loaded into it but it just froze

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i2cWriteRegister(DEVICE_MCU, MCU_POWER, 1); // Shutdown

I noticed in main.c you left out
0x20 and put in MCU_POWER. Intentional?

He defined it in the i2c header.

typedef enum {
    MCU_VOLUME = 0x09,
    MCU_BATTERY = 0x0B,
    MCU_POWER = 0x20
} I2CRegister;

 

[Deleted User]

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[daxtsu]

A-ha, I see. Could you try to see if you can use his payload please?

I don't have a 3DS right now.

 

[Deleted User]

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[Wolfvak]

Oh 0.0 Well that's a problem...

Worked fine for me. Try using this start.s and recompile.

 

[Deleted User]

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[Wolfvak]

Wasn't able to compile, can you please? Sorry. Does it depend on the type of 3ds you have?

There you go, hopefully it works. By the way, what's your a9lh version? As in, initial no screen-init, dark-samus with screen-init, delebile's latest, etc.

 

[Deleted User]

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