• Arduino board - https://mcudude.github.io/MegaCoreX/package_MCUdude_MegaCoreX_index.json

  • MegaCoreX - megaTinyAVR
  • https://mcudude.github.io/MegaCoreX/package_MCUdude_MegaCoreX_index.json
  • https://github.com/MCUdude/MegaCoreX

DxCore - megaTinyCore

  • by Spence Konde
  • https://github.com/SpenceKonde/megaTinyCore
  • https://github.com/SpenceKonde/megaTinyCore/blob/master/Installation.md
  • https://github.com/SpenceKonde/DxCore
  • https://github.com/SpenceKonde/DxCore/blob/master/Installation.md
  • http://drazzy.com/package_drazzy.com_index.json
  • AVR128

Atmega

  • megaCoreX-dat - atmega4808 https://mcudude.github.io/MegaCoreX/package_MCUdude_MegaCoreX_index.json

ref