Hacking Question/Idea? 4.5 Emunand on N3ds to allow for MT-card/DStwo+?

[Timburpton]

NOTE: I'm referring to 3DS mode not the DS cart mode

The MT-Card and DSTWO plus does not work on the N3ds because it default comes on firmware>9.2.

However, if the sysnand of N3ds were to be downgraded to 4.5, I'm fairly certain it will work.

Given this, would it be possible to boot straight into emunand 4.5 (via a9lh) in order to facilitate the usage of emunand with MT-card/DSTwo+?

Premise

1. Gateway A9LH.bin serves to launch the launcher.dat (this means we have a way to start launcher.dat)
   
2. MT-card and DStwo+ launcher.dat is launched but fails to work. I have tested this with 2.3 MT-card launcher.dat and it black screens. This situation is the same as when emunand version is too high and not supported
3. Hypothesis is that in the link below

For instance
https://gbatemp.net/threads/how-to-...latest-10-1-emunand-with-eshop-access.398117/

This allows the usage of latest emunand on MT-card via hex editing. It stands to reason that some of the titles are not working on >9.2 hence resulting in MT-card/dstwo+ not booting.

Solution?

1. Either create a emunand with 4.5 and use the above link to install the 4 system titles after hex editing
   
2. Or install the 4 system titles after hex editing directly onto sysnand allow for MT-card/DStwo+ support.

What I need from you guys in terms of advice and help

1. With N3DS A9LH, can I swap SD card to prepare for emunand etc etc and when its all done can I just swap back to my original SD card and have my 3ds back to its original state before this experiment?
2. Solved
   Spoiler

   How can I downgrade emunand to 4.5 on N3DS? (On a side note, since supposedly MT-card can boot into 9.2 emunand, wouldn't it be possible for me to to emunand 9.2 as well? perhaps I will try this first)
   
   

   Find the 4.5 fw on that iso site and use sysupdater in emuNAND to downgrade it to that version.
   Remember that N3DS doesnt officially support 4.x, And 4.x doesn't have a softkey to toggle WiFi

   
   

 

[ShadowOne333]

Why not simply install the DS Flashcart Whitelist CIA?
I did that for both my N3DS w/Blue GW cart and my O3DS w/R4itt cart, both systems with 11.0 A9LH sysnand and both flashcarts work wonderfully.

 

[satan89]

How can I downgrade emunand to 4.5 on N3DS

I can help you with this at least.
Find the 4.5 fw on that iso site and use sysupdater in emuNAND to downgrade it to that version.
Remember that N3DS doesnt officially support 4.x, And 4.x doesn't have a softkey to toggle WiFi

 

[Timburpton]

Why not simply install the DS Flashcart Whitelist CIA?
I did that for both my N3DS w/Blue GW cart and my O3DS w/R4itt cart, both systems with 11.0 A9LH sysnand and both flashcarts work wonderfully.

My bad, I wasn't clear. Was referring to the 3ds cart.

I can help you with this at least.
Find the 4.5 fw on that iso site and use sysupdater in emuNAND to downgrade it to that version.
Remember that N3DS doesnt officially support 4.x, And 4.x doesn't have a softkey to toggle WiFi

Yeah but would 4.5 work natively? I remember while installing a9lh, 2.1 needed to be unbricked to work. Would 4.5 need to be unbricked to work or does it work straight away?

 

[ShadowOne333]

My bad, I wasn't clear. Was referring to the 3ds cart.



Yeah but would 4.5 work natively? I remember while installing a9lh, 2.1 needed to be unbricked to work. Would 4.5 need to be unbricked to work or does it work straight away?

You need to unbrick it too since 4.5 is only available for O3DS, N3DS needs unbricking for that FW to load.

 

[Timburpton]

You need to unbrick it too since 4.5 is only available for O3DS, N3DS needs unbricking for that FW to load.

How can I unbrick it though?

 

[satan89]

My bad, I wasn't clear. Was referring to the 3ds cart.



Yeah but would 4.5 work natively? I remember while installing a9lh, 2.1 needed to be unbricked to work. Would 4.5 need to be unbricked to work or does it work straight away?

I Don't know that.
Why exactly are you trying to use MT/DSTWO?

 

[Timburpton]

I Don't know that.
Why exactly are you trying to use MT/DSTWO?

Because I own a MT and am considering getting a DSTWO+ for my DS+3DS needs. I mainly use CIAs now but would like to tinker around. That's why the homebrew/cfw scene exists. People work to do shit that can't be done before.

 

[Ryccardo]

How can I unbrick it though?

With otphelper!
Not one click setup, of course, but the "unbrick" only option... assuming it doesn't verify that your titles are the 2.1 ones...

 

[Timburpton]

With otphelper!
Not one click setup, of course, but the "unbrick" only option... assuming it doesn't verify that your titles are the 2.1 ones...

Interesting. Now all that is left is to confirm if I can perform such things by using a new SD card and then getting my 3ds back to the way it was by replacing my original sd card.

 

[Ryccardo]

Interesting. Now all that is left is to confirm if I can perform such things by using a new SD card and then getting my 3ds back to the way it was by replacing my original sd card.

Yes, it's perfectly possible to have multiple emunands by putting each on a different card (and in fact has much better compatibility than the various multi-emunand solutions).
I don't know though if the MT cfw will like a n3ds partition table...

 

[Timburpton]

Yes, it's perfectly possible to have multiple emunands by putting each on a different card (and in fact has much better compatibility than the various multi-emunand solutions).
I don't know though if the MT cfw will like a n3ds partition table...

Interesting. I guess I'll be extra careful about this then. I'll perform a NAND backup first etc etc.

Since A9LH means I'm brick proof so long as I don't mess with A9LH itself.