0.20.0

**0.20.0** is Atmosphère's fifty-second official release.

fusee-primary was last updated in: **0.20.0**.

With thanks to the @switchbrew team, Atmosphère 0.20.0 is bundled with [hbl](https://github.com/switchbrew/nx-hbloader) 2.4.1, and [hbmenu](https://github.com/switchbrew/nx-hbmenu) 3.4.1.

The following was changed since the last release:

* DRAM training (MTC) was implemented for Mariko hardware, increasing RAM speed from 204MHz to 1600MHz.
  * This significantly optimizes Mariko boot speed, cutting boot time roughly in half.
  * Typical boot time reductions (measured as "select fusee" to "home menu visible"):
    * Normal (Iowa): ~35 seconds -> ~18 seconds.
    * Lite (Hoag): ~65 seconds -> ~30 seconds.
  * NOTE: Work is being started on a re-written `fusee` component, with an eye specifically towards ensuring a good boot speed.
    * With any luck, boot will be much much faster on all units (Mariko and Erista) in an upcoming release.
* Sept was replaced, and deleted from the repository.
  * Erista units now use a custom TSEC firmware to manage key derivation.
    * For more details, contact `SciresM#0524` on discord.
  * This has a number of benefits, including:
    * This greatly simplifies key derivation logic by making it consistent on all firmwares.
      * Fusee no longer accesses/uses keyblobs at all, so units which have accidentally destroyed/lost keyblobs can boot without them.
    * This greatly increases stability (sept was the biggest source of boot failures).
    * This improves boot speed (sept rebooted multiple times, performed hardware init multiple times, and was generally very slow).
    * Atmosphère build process is now much saner.
* A number of improvements were made to the dmnt cheat engine.
  * Cheats which take in a memory region operand may now use types "2" or "3" to perform accesses relative to the alias/aslr regions, respectively.
  * Support was added for an "else" opcode in the cheat engine, to make writing certain conditional logic more natural.
  * Support was added for a cheat orchestrator homebrew (like edizon) to detach from a cheat process/set the master cheat programmatically.
* Daybreak now provides a warning when attempting to install a firmware newer than the highest version atmosphère knows it supports.
  * To facilitate this, exosphere now exposes the supported HOS version via an extension ConfigItem.
* A number of minor issues were fixed, including:
  * Several mesosphere debug SVC implementations were updated to reflect the semantics of the latest kernel.
  * Support was fixed for deriving BIS encryption keys on certain prototype hardware.
* General system stability improvements to enhance the user's experience.

For information on the featureset supported by 0.20, please see [the official release notes](https://github.com/Atmosphere-NX/Atmosphere/releases/tag/0.20.0).