AYN

Details on Aya Odin Base/Pro

1. burn a sdcard with batocera on it
2. boot the board on Android
3. download odin2_custom_abl_xxx.7z (original link) or odin2_custom_abl.zip (copy on batocera.org) and extract it at the top of the root of Android internal storage
4. go to Android settings : “Odin settings” → “Run script as Root” to run the “backup_and_flash.sh” script (The original ABL will be backed up to /sdcard/backup)
5. reboot and enjoy

1. Boot your Thor device on Android.
2. Download odin2_custom_abl.zip (this is the same package as the Odin2 above) and extract it into /sdcard/odin2_custom_abl/. It is really important that you extract the zip file in this directory, because some paths are hardcoded in the next step. If you extract it somewhere else, the flash will fail, but you won't necessarily notice it. If you extract somewhere else, you will have to adapt the paths in the following script.
3. Go to Android settings, at the bottom in the Thor settings → Run script as Root and select the backup_and_flash.sh script. The script will run quickly and back up the original boot loader to /sdcard/backup/ directory. Keep this as a backup in case you want to rollback.
4. Download the Batocera Ayn Thor image and burn it on an micro SDCard. Warning: make sure you have a high quality SDcard. In my testings, I failed booting a 256GB no-name card, while a 128GB PNY went flawlessly.
5. Then, if you have your Batocera micro SDCard inserted in your Thor, boot it up and it starts on Batocera. Remove the SDCard, and you'll be back to Android.

Before you flash with the new boot loader, you can access some boot options by keeping pressed the [Vol -] and Power buttons. The old boot loader is in portrait mode and looks like this: If you still have access to this menu after you think you flashed your boot loader, try again (and verify the paths, the install needs to be in the directory specified above).

After you successfully flashed the new boot loader, there is no need to use any key combination to boot Linux and Batocera. If, for whatever reason, the Linux boot process fails, you will have this kind of message on your device (in landscape mode now). After a few seconds, it will automatically boot back on Android.