Possible to disable autoboot of DSOne cart?

[FR0ZN]

Hi all,
title says it all.
Does anyone know if you can disable DSOne's autoboot feature?
I have a EZ-Flash Omega in my DSLite at the same time but I can't use it without ejecting the DSOne first all the time.
Or is there a way to boot the GBA cart from the DSOne menu?

 

[4d1xlaan]

Sounds like the one time where fwnitro might actually be useful

https://fwnitro.caitsith2.net/

I have not tested it (I don't have any ds cards that autoboot anymore), but holding start + select on power on should cancel the autoboot and allow you to boot the gba cart

It's probably recommended you have a second ds lite on hand you could use to unbrick if the flashing process goes wrong

For a less potentially destructive option: http://eng.supercard.sc/manual/dstwo/plugin/slot2_gba.htm

 

[boots_n_cats]

Hi all,
title says it all.
Does anyone know if you can disable DSOne's autoboot feature?
I have a EZ-Flash Omega in my DSLite at the same time but I can't use it without ejecting the DSOne first all the time.
Or is there a way to boot the GBA cart from the DSOne menu?

There is homebrew that lets you boot to slot-2: https://www.gamebrew.org/wiki/Simple_GBA_Mode_Switcher

 

[moon_rabbit]

https://problemkaputt.de/gbatek-ds-cartridge-header.htm

According to the DSONE SDHC firmware I dumped, there is an 04 at 0x1F.
After modifying the firmware with 0x1F to 00, autoboot should be turned off.

-------
You need to change the crc-16 header checksum of 2 bytes present at 0x15E.
For the dsone firmware I dumped, it is B6, 51.

 

[Apache Thunder]

Yeah that's the autoboot flag. bit 2 specifically. The OP can refer to this thread for if/when DS one becomes updatable:

https://gbatemp.net/threads/it-might-be-possible-to-add-dsone-to-ntrboot_flasher.656805

If it can then yes you can disable autoboot by replacing rom with modified one with the autoboot bit disabled.

 

[4d1xlaan]

Does dsone have a banner? I recall original r4 didnt have one so it would cause problems to manually boot it or something like that (reason why you needed your ntr launcher)

but if the firmware is replaceable and that is a problem, then a banner could be added to fix that problem

 

[FR0ZN]

Does dsone have a banner? I recall original r4 didnt have one so it would cause problems to manually boot it or something like that (reason why you needed your ntr launcher)

but if the firmware is replaceable and that is a problem, then a banner could be added to fix that problem

I coul've sworn I saw one once.
But I don't know where, I can't find it anymore.
Could've been Twilight but I'm not sure.

 

[4d1xlaan]

I coul've sworn I saw one once.
But I don't know where, I can't find it anymore.
Could've been Twilight but I'm not sure.

If you have a dsi or 3ds, you could probably put it in there and see

If unmodded dsi/3ds cant show unofficial/unsigned banners like older flashcarts have, then modded with unlaunch or luma should have no issue at least

Edit: seems I remember wrong, even with no banner it should work, it would just be blank (although maybe it's different on ds/lite?)

https://gbatemp.net/threads/ntr-lau...or-your-ds-games.440110/page-25#post-10309763

 

[moon_rabbit]

Both banners and icons exist.
You can see this when you put them in a hacked 3DS.

There is something to add from the disable autoboot fix.
You need to change the crc-16 header checksum of 2 bytes present at 0x15E.
For the dsone firmware I dumped, it is B6, 51.

 

[FR0ZN]

Just checked on my 3DS

 

[4d1xlaan]

You need to change the crc-16 header checksum of 2 bytes present at 0x15E.
For the dsone firmware I dumped, it is B6, 51.

CRC-16/MODBUS to be more specific

anyway I can at least confirm that this works

 

[Technicmaster0]

You can also use the .nds file from the dstwo slot-2 gba plugin to launch gba cards with a slot-1 flashcard.