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 2.4.1, and 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.