1.9.1

**1.9.1** is Atmosphère's eighty-second official release.

**Please be sure to update fusee when upgrading to 1.9.1**. fusee-primary no longer exists, and will not work any more.

With thanks to the @switchbrew team, Atmosphère 1.9.1 is bundled with [hbl](https://github.com/switchbrew/nx-hbloader) 2.4.4, and [hbmenu](https://github.com/switchbrew/nx-hbmenu) 3.6.0.

The following was changed since the last release:

* Basic support was added for 20.1.0.
* General system stability improvements to enhance the user's experience.

And the following was changed in 1.9.0:

* Basic support was added for 20.0.0.
  * The console should boot and atmosphère should be fully functional. However, not all modules have been fully updated to reflect the latest changes.
    * There shouldn't be anything user visible resulting from this, but it will be addressed in a future atmosphère update.
    * The same action item from 18.0.0 remains, and I believe in my heart of hearts that it will be addressed eventually. Someone has told me they're working on it.
    * There aren't (to my knowledge) outstanding 19.0.0 items any more.
  * **Please note**: As a result of changes made to nintendo's software in 20.0.0, there is roughly 10MB less memory available for custom system modules.
    * We can only steal a maximum of 14MB from the applet pool, down from 40MB.
    * To compensate for this, `ams.mitm`'s heap usage has been reduced by 20MB.
      * To facilitate this, a new helper module (`memlet`) was added, so that memory may be temporarily stolen during the romfs building process.
      * Hopefully, this results in relatively little breakage, however it is possible that user mods which replace extremely large numbers of files in The Legend of Zelda: Tears of the Kingdom may no longer function.
        * If you are affected by this, you will see "Data abort (0x101)" when trying to launch the game with mods.
        * Please reach out to `sciresm` on discord if this occurs to share your error report binary. However, some issues may be impossible to fix.
        * I apologize sincerely if the issue is impossible to resolve, but I have been forced unavoidably to make compromises here, and I think this is the best balance to be struck.
  * `exosphère` was updated to reflect the latest official secure monitor behavior.
  * `mesosphère` was updated to reflect the latest official kernel behavior.
  * `loader` was updated to reflect the latest official behavior.
  * `pm` was updated to reflect the latest official behavior.
  * `ncm` was partially updated to reflect the latest official behavior.
  * `erpt` was updated to reflect the latest official behavior.
* Atmosphère was updated to use GCC 15/newlib (latest devkitA64/devkitARM releases).
* A number of improvements were made to the dmnt cheat engine.
  * New instructions were added, and instructions were updated for improved/new functionality.
  * Please see the documents for details -- thanks @tomvita!
* General system stability improvements to enhance the user's experience.




For information on the featureset supported by 1.9, please see [the official release notes](https://github.com/Atmosphere-NX/Atmosphere/releases/tag/1.9.0-prerelease).