gnaghi / safesysupdater

3DS sysupdater mod

Official GBAtemp thread

This is a fork of SysUpdater who permit 3DS user on firmware between 9.3 and 10.3 to downgrade.

This app is an improvement of TuxSH memchunkhax2 implementation (who was been,infortunately,deleted of github) and can:

• automatically load update information (needed files, md5) based on your 3ds model and region
• md5 check all the cia update files before downgrading
• can check your update files without actually downgrading

To use it you have to :

• Put SafeSysUpdater.3dsx somewhere you can launch it...

• Put your downgrade pack as usual ("/updates/*.cia")

• Launch it multiple times until it pass the black screen (hax)...

• Pray

  PLEASE NOTE THAT THIS HAVE THE SAME DOWNGRADE CODE THAN ORIGINAL SYSUPDATER DOWNGRADE PROCESS IS NEVER 100% SAFE BE SURE TO BE ON 10.3 BEFORE DOWNGRADING, SEEMS TO PREVENT SOME SOFT BRICK SOME TIPS TO PREVENT A BRICK : HERE

Notes:

• If it freeze just after you press (Y) to downgrade or "init ->" more than 1 second, restart..
• The 9.2 JPN package is in fact a 9.1 package, no problem with this..

Changes :

• v09: add downgrade logs ("/SafeSys.log")
• v08: fix JPN files path..
• v07: finally fixed the input freeze... by removing this second confirmation screen.
• v06: try to fix input freeze... again
• v05: minor input fix
• v04: added japan support (with bad title skipping)
• v03: big improvement in hax success rate
• v02: Add simulation mode to check your update files without actually downgrading
• v01: Removed the config files, just put the ".3dsx" file somewhere and downgrade... and pray.
• v01: Added a CIA version to downgrade from emunand so you don't need to try hard to get the hax to succeed (so it's just for testing/reporting bugs). Testing this will ensure the MD5 for each regions/models (only o3DS/n3DS USA/EUR for now) and downgrade process is correct/working. Thanks for reports !

Credits:

• derrek for the initial memchunkhax2 flaw discovery
• Steveice10 and all people who worked on memchunkhax2
• TuxSH for the downgrade code (memchunkhax2 implementation)
• This app was totally rewritted,but thank profi200 for the original app

Screenshot: