This guide covers everything you need to know about finding, selecting, and flashing firmware for H3 devices.
The "Mainline" or "Legacy" bootloader responsible for loading the operating system kernel and providing the Device Tree Blob (.dtb) which tells the OS exactly how the H3's hardware is wired on that specific board. Operating System Variations Allwinner H3 Firmware
Once U-Boot is loaded into RAM, the H3 starts to look like a "real" computer. U-Boot initializes the rest of the peripherals (USB, Ethernet, GPIO) and reads the ( boot.scr ). This guide covers everything you need to know
: Custom firmware often includes better "throttling" logic to keep your H3 chip from overheating. specifically on an Allwinner H3 Firmware