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Main - Homebrew projects - braindump prerelease - dump game contents on any system version! New reply


neobrain
Posted on 10-26-15 07:14 PM Link | #578
Hi,

In the past few days, I've been working on a new tool called braindump. I'd hereby like to announce a pre-release of the tool, meant to help people interested in ROM hacking to get set up faster.

WHAT'S BRAINDUMP?
braindump is a 3DS userland homebrew application that can dump decrypted contents (both ExeFS and RomFS) of any 3DS game. This includes cartridge games, but also content obtained from the eShop and even some system applications. Even better yet, braindump runs on any system version since 9.0, including the most recent one.

WHAT IS IT USEFUL FOR?
Currently, it's for the most only useful for dumping game assets: Graphics, sounds, 3D models, etc. In particular, this should be useful for anyone interested in game modding.

braindump's feature set has been covered by uncart and Decrypt9 before, however braindump provides a few major advantages:
  • it runs on any system version newer than 9.0, including the most recent one. uncard and Decrypt9 are limited to system versions 9.2 or below.
  • it dumps cartridge games, eShop content, and (some) system applications in a uniform way. All three of these had to be decrypted with different commands before.
  • it's more convenient, since it can be launched directly from the Homebrew Launcher and only requires one operation step from starting to the decrypted content. uncart and Decrypt9 had to be launched through a separate program, and after dumping a game you had to restart your console and run another chain of commands to actually decrypt things.

DOWNLOAD AND USAGE
Binaries are available on GitHub. Note that I'm releasing the tool earlier than planned to make the HANS application shipping with *hax 2.5 more accessible to the broader masses (see below). For now, I'll keep the source code private, but rest assured it will be published as soon as I get to implementing the full feature set that was planned.

Extract the archive into your SD card's 3ds folder. The full path to the 3dsx should be "sd:/3ds/braindump/braindump.3dsx", and next to that file there should be an xml file. braindump must be launched from 3ds_hb_menu (3dslink or CIAs won't work). Upon launching, you will be asked for a target title - this is the application that will be dumped. Note that the tool will start dumping immediately after selecting the target title, so better make sure you have enough free space on your SD card.

Sorry for the lack of further instructions -- I'd rather get this thing out ASAP to make it useful for the more knowledgeable people. I'm sure we can clear up any confusion in the next few days, though ;)

FREQUENTLY ASKED QUESTIONS
How to ROM hack?!
At this stage, I cannot give you full instructions on how to mod a game, but here are some quick hints:
  • Dump the game contents using braindump on your 3DS. This will place the files exefs.bin and romfs.bin on your SD card (in a subdirectory with a 16-digit number as its name)
  • On your PC, extract the two files using ctrtool. Use "ctrtool --intype=romfs --romfsdir=romfsdir romfs.bin" and "ctrtool --intype=exefs --exefsdir=exefsdir --decompresscode exefs.bin" to unpack the romfs and exefs, respectively
  • Game modders will be interested in the contents extracted to romfsdir. Modify whatever you like, and repack the contents using 3dstool
  • Put the new romfs binary on your SD card. Start HANS on your 3DS and point it to the modded game, and make it replace the romfs with your new image. Note that for HANS to detect the romfs binary, you'll need to remove the first 0x1000 bytes from the romfs binary.

Can I use the dumps with Citra?
Unfortunately, not yet.

I have a question and it isn't answered here!!!11
Give me a break, I wrote the FAQ 5 minutes before publishing this post! ;)

FUTURE PLANS
There's a lot more to come in braindump than just dumping ExeFS and RomFS. Stay tuned, I guess ;)

Yoshi
Posted on 11-01-15 10:04 AM Link | #638
Would be nice if there was some kind of database of all dumped files of every region, although these files are quite big heh....
I can dump a few games of EU region, I'd love to play them in JP if there are any dumped ones. (or does ROM work too in a fancy way?)

I wonder if it's acceptable for speedrunning (ROM hacks are accepted if they're good, should be different though)

____________________
3DS 9.8.0.25E with themehax 2.0
3DS 4.3.0.4E (EmuNAND 10.3.0.28E/OoT3Dhax)

Very active player on Pokémon Shuffle, rip NNID (hello .cia)

Steveice10
Posted on 11-01-15 11:59 AM Link | #643
Posted by Yoshi
Would be nice if there was some kind of database of all dumped files of every region, although these files are quite big heh....
I can dump a few games of EU region, I'd love to play them in JP if there are any dumped ones. (or does ROM work too in a fancy way?)

I wonder if it's acceptable for speedrunning (ROM hacks are accepted if they're good, should be different though)

Pretty sure distributing the dumped files would not be legal.


Main - Homebrew projects - braindump prerelease - dump game contents on any system version! New reply

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