Important Note!!!

Tip:

The original system cannot be upgraded to a 64-bit low power sleep system through the upgrade package. It can only be upgraded by flashing some image files to TF1.
The RG35xx SP system is an unofficial release and is a modified version. After entering sleep mode, the Hall element will power off, so there is an imperfection: when the cover is closed to enter sleep mode, the system will not automatically wake up when the cover is opened, and the power button needs to be pressed. Players who mind can choose to continue using the original system
When using balenaEtcher flash TF under MacOS system, automatic partitioning will fail. It is recommended to use rufus flash TF under windows.
The system needs to install data on the first boot, Please be patient and do not manually shut down or restart.
Upgrading the upgrade package may cause problems with some functions. If you encounter this situation, please use a new image to flash TF.

Added NDS Pinyin cheat code (due to drastic limitations, Chinese characters are displayed as Hanyu Pinyin)
Added 512MB swap space
Modified ports game cross key analog joystick function switching vibration prompt (enable vibration once, disable vibration twice)

Used to create a brand new system for TF1, After flashing, all the original data of TF1 will be lost. Please make a backup in advance.

Download the corresponding OS_image file according to the model
Decompress the image
Write the image to an SDCARD using an imaging tool. Common imaging tools include Rufus, Balena Etcher, Raspberry Pi Imager, and Win32 Disk Imager. If you're skilled with the command line, dd works fine too.

Go up a directory and download the folder. Google Drive will make a zip of this folder and allow you to download that instead.