Okay. Many of you know the DSTWO+ flashcart. It is an enhanced flashcart for DS games that has the additional function: it can emulate Gateway to play .3ds roms. Some of you were (un)lucky enough to get this one. There's a problem, however: some of the latest launchers (3.5 and so on) have the detection of counterfeit carts ("brick code", 3.6+ ones don't even allow you to select games) making it seemingly impossible to play games on DSTWO+ with the latest EmuNAND. But there's a way to fix it and to make 3.4.1 launcher work with 11.0 EmuNAND.
Unfortunately, this method only works with Old 3DS/2DS (no new ones, 3.4.1 doesn't support 9.6+ New 3DS EmuNAND)

It is advised to back up EmuNAND before making such modifications.

What do you need:

An EmuNAND set up on your 3DS/2DS (with Gateway CFW or with any other CFW)
FBI ver. 2.0+ installed on your 3DS/2DS in EmuNAND
3.4.1 Launcher.dat (if you own the DSTWO+, you probably know where to find it)
A hex editor of your choice

1. Get the Home Menu title: go to "that iso site" and find the topic with the downgrade packs. Download the 9.9.0 one for your region and then find this one title. It should be
0004003000009802 for EUR,
0004003000008F02 for USA or
0004003000008202 for JPN consoles.
2. Open the hex editor and go to offset 0x2F9C. Change 2 bytes to FF FF (to change version number to 65535). This way you can avoid Home Menu updates. Alternatively, you can change the bytes to 60 00, 64 00 or 6C 00 for EUR, USA and JPN menus respectively to safely update EmuNAND in the future without the fear to screw it up. Save the modifications.
3. Place the 3.4.1 Launcher.dat in the root of your SD card and modified Home Menu somewhere.
4. Launch EmuNAND from CFW of your choice. Make sure that you have FBI installed on your EmuNAND. Go to the system settings and update EmuNAND.
5. Launch FBI and then install the modified Home Menu.
6. And there you have it! Now your DSTWO+ can launch .3ds roms on 11.0 EmuNAND!

(tested on European Old 3DS)
Online play? Works!
A9LH Payload? Stage2? 3dsx? Everything works with 3.4.1!

 

[SEAgreen206]

Correction: pre- DSTwo+ detection. You'd better believe there is still brick code in there.

Thanks for the correction/clarification!

 

[Timburpton]

Would this work with a9lh sysnand n3ds?

 

[Sakitoshi]

Thank you!!!
My dstwo was collecting dusk but now I can use it again and have double space for games.
Combined it with a9lh and works flawlessly, my xl now has dualboot luma3ds and gateway.
To bad didn't work on my new 3ds. Gateway refused to boot there.

 

[SEAgreen206]

Does this require an emuNand or will it work on A9LH Luma updated sysNAND?

Thanks in advance!

 

[Elveman]

Does this require an emuNand or will it work on A9LH Luma updated sysNAND?

Thanks in advance!

I don't really recommend you installing spoofed menu to your sysNAND as this might cause a brick if done wrong (especially if you spoof your menu to 0xFFFF version: the next update can cause a brick as well). So be careful, do the SysNAND backup, spoof menu to the right version and do not update under GW SysNAND if you want to do so

 

[SEAgreen206]

I don't really recommend you installing spoofed menu to your sysNAND as this might cause a brick if done wrong (especially if you spoof your menu to 0xFFFF version: the next update can cause a brick as well). So be careful, do the SysNAND backup, spoof menu to the right version and do not update under GW SysNAND if you want to do so

Thanks for the response. I have several NAND backups. So in theory if done correctly and I only update system through Luma w/ firm protection, this should work and no brick?

Edit: Is the spoofed home menu required to get the DSTwo+ working with the gateway A9LH payload? It's not required on my n3ds running A9LH Luma updated sysNAND using a gateway card.

 

[glenwithonen]

Ugh I have a dumb question...

I'm stuck at finding the 0x2F9C offset.
I have the 9.9.0-26U 0004003000008F02.cia file.
I have basic experience with HEX editors, but cannot for the life of me find the 0x2F9C offset inside it.

Help? Thank you :-)
Glen

(PS I'm planning to use the Mario Maker rom to update emunand to 11.1 afterwards...)