3ds_essential_dumper

Tiny program for dumping essential files from 3DS console, which hopefully work on consoles that have dead FCRAM / NAND and broken screen.

General Info

This program runs solely on ARM9 processor and only use ITCM/DTCM, thus should hopefully work on consoles that have dead FCRAM (and maybe even VRAM/ARM9 Memory¹?)

It'll try to dump all these files whenever possible:

• OTP
• NAND CID
• NAND NCSD Header
• Embed GodMode9 Essential Backup
• If CTRNAND is mountable
  • HWCAL0/1
  • LocalFriendCodeSeed
  • SecureInfo
  • movable.sed
• Full NAND

Before dumping full NAND, it'll blink red power led (the same as low power indicator), you can press Y/B to cancel it, or any other button to continue dumping.

To-Do List / Roadmap

• setupKeyslots on init
  • seems to be required if booting directly from ntrboot?

How to Build This

Building requires firmtool, and either arm-none-eabi-gcc and arm-none-eabi-objcopy in path or DevkitARM installed. Then, just run make.

License

You may use this under the terms of the GNU General Public License GPL v2 or under the terms of any later revisions of the GPL. Refer to the provided license.txt file for further information.

Credits

• aspargas2, this whole repo is heavily based on 3ds_hw_test
• LumaTeam, for crypto.c / diskio.c / sdmmc.c / mcuSetInfoLedPattern code, from (old) boot9strap code
• The Chromium OS Authors, for thumb_case.S (__gnu_thumb1_case_uqi) code
• Jörg Mische, for uidiv.S (__aeabi_uidiv) code
• Cha(N), Kane49, and all other FatFS contributors for FatFS
• All 3dbrew.org editors

Footnotes

1. Actually, bootrom won't be happy about bad ARM9 Memory, at least probably the first ~0x40 need to be working. ↩