A quick update has been released for Polari3DS , a modified (forked) version of the popular Luma3DS custom firmware , designed for the Nintendo 3DS and 2DS handheld consoles (including the New 3DS and New 2DS models ).

This custom firmware allows you to unlock advanced features not available in the official Nintendo firmware , such as running homebrew applications (unauthorized software), removing region restrictions, and other customization and debugging options.

It is described as “Noob/Advanced-proof,” which means that it is intended to be accessible to both novice and more experienced users.

Among the more notable changes addressed in this update are the fix for warnings about uninitialized strings in the loader module , a fix for a function-related bug in the arm9loadDeliverArg module , and a major optimization to the bootloader , which now correctly clears the New 3DS adaptive backlighting registers when auto-booting a DSi title.

This fix has non-trivial implications: the original Nintendo firmware incorrectly treated some hardware aspects of the New 3DS as if they were identical to the older models, resulting in abnormal behavior in specific scenarios, such as booting into TWL mode (DSi) or AGB mode (GBA).

The intervention of the programmers thus avoided malfunction situations, known among developers as “rave parties”, caused by backlight LUTs (Look-Up Tables) not initialized correctly.

In addition to these technical fixes, the update included the integration of the latest versions of external libraries such as fatfs and inih , ensuring broader compatibility and an updated code base.

The latest commits also show a general increase in version number (bump), indicating the end of a development cycle and the entry into a new, more stable phase.

Main features

Polari3DS is based on Luma3DS , but includes additional features and specific modifications. Here is a summary of the main features:

Luma3DS Basic Features

Real-time Patching: Modifies the console’s system software to add features like per-game language settings, developer debugging capabilities, and removing restrictions like region locking.
Running homebrew: Allows you to run unofficial applications by removing software signing checks.
In-game menu (Rosalina): Accessible with key combinations (L+Up for the debug version, L+Down+Select for the stable version), offers options such as screenshots, cheats and system management.

Polari3DS Specific Features

Improved Streaming via Rosalina : Integrates a 3DS screen streaming feature to a computer, similar to the old NTR CFW, but more stable (though still in development, with slow framerates). It is compatible with software such as Snickerstream or NTRView for Wii U.
TWL Redirection Patch : Allows you to redirect TWL firmware data (for DS games) to SD card, reducing internal NAND usage. Available in two versions: a stable one with more features and a simpler one for SD redirection only.
Pirate-Launcher : Included in the package, it allows you to launch homebrew applications in a simplified way.
Interface customizations and features :
- Shortcuts to toggle the bottom or top screen (useful for videos or broken buttons).
- Quick reboot with A+B+X+Y+Start (with risk of SD card corruption if used in case of freeze).
- Software volume control, separate brightness adjustment for both displays, and permanent brightness calibration.
- Options to disable automatic updates (by creating a noupdate.txt file in the /luma folder).
- New 3DS-specific configurations, such as enabling enhanced performance for select games.
EmuNAND Support : Allows you to use a copy of your NAND on an SD card, useful for avoiding changes to your system NAND and for those with damaged NAND (with NTRBoot).
Other changes :
- Disabling ARM11 exceptions and reduced Wi-Fi options in Luma’s configuration menu.
- Support for loading custom logos and firmware version spoofing.
- Advanced debugging options, such as those inspired by the Seledreams fork.
Experimental or unsupported features :
- SysNAND Gateway: Not supported at this time, as it may cause issues.
- TWL Patch for EmuNAND: Not tested yet.
- Ignore Hardware Errors: Options to ignore display or hardware errors, but with warnings about the risks to your console.

Requirements

A Nintendo 3DS/2DS console capable of running homebrew software on the ARM9 processor.
An SD card formatted in FAT32.
Boot9Strap or another compatible bootloader installed on your console.
The file boot.firmgenerated by Polari3DS , to be copied to the root of the SD card.

Automatically updated nightly builds are available: https://nightly.link/Alexyo21/Polari3DS/workflows/build/master/Polari3DS-nightly.zip .

Italian version : There is a translated version in Italian, thanks to Simo: https://github.com/Simo3ds/CustomLuma3DS-ITA .

Warnings and risks

Corrupted NAND : If your console’s NAND is corrupted, Polari3DS can be used with NTRBoot and an EmuNAND, but this has not been thoroughly tested yet.
Quick Reboot : Using the quick reboot key combination may corrupt your SD card.
Streaming : The streaming feature is still experimental, with low frame rates, and is not recommended for public use.
Ignore hardware errors : Enabling options like “ignore err disp” may mask hardware problems, but it won’t fix them, leaving your console at risk.
Backup : It is essential to backup your NAND and important data before installing Polari3DS, as a failure during installation could render your console unusable (brick).

Support and community

Discord Server : To support or contribute to the project, you can join the Discord server: https://discord.com/invite/qR2D3dq43b .
Documentation : Further details on setup, usage and functionality can be found in the Luma3DS wiki: https://github.com/LumaTeam/Luma3DS/wiki .

Upcoming updates

Improvements to the fast debugger and chainloader.
New patches, such as using the notification LED for special effects.
Review of the “Nightshift Remake” (not specified what it is).
Chainloader fixes and reformat.

Changelog

The separate file boot.firmis included for debugging purposes, e.g. with GDB. A version of the Rosalina streaming module is also included in the archive (works only on New models).

General

Updated the Luma3DS codebase with specific improvements for compatibility and general stability.
Interface and structure designed to be both “noob-proof” and suitable for advanced users.

Fixes and technical improvements

Loader : Fixed nonstring warnings.
ARM9 : Fixed a critical bug in the loadDeliverArg.
Bootloader : Added zerofill of ABL (Adaptive Backlight) registers on New 3DS when autobooting DSi titles. This fixes:
- Fixes incorrect backlight issues due to O3DS/N3DS hybrid mode in TWL/AGB_FIRM;
- Prevents visual glitches (“rave party” effect) on some N3DS models;
- Ensures more consistent power management in legacy firmware.

Updated libraries

fatfs : Update to the latest available release.
inih : Update to the latest version for better handling of configuration files.

Other

Various intermediate version “bumps” to consolidate the stable state of the current development branch.
Upload new files related to the source code and binary components of the project.

Full Changelog : GitHub – Polari3DS v1.2.0 → v1.2.1

Download: Polari3DS v1.2.1

Download: boot.firm

Download: Source code Polari3DS v1.2.1

Source: github.com

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