The official starting point for H3 firmware is Allwinner Technology and its partners. While direct access to original Allwinner BSPs can be challenging, they often surface through the support channels of board manufacturers:
Look for text printed on the circuit board, such as MXQ_H3_V2.0 , OrangePi_PC , or similar identifiers. Allwinner H3 Firmware
Because the H3 utilizes standard ARM boot workflows, the firmware generally splits into two distinct ecosystems: and Linux-based (Open Source) . 2. Types of Allwinner H3 Firmware The official starting point for H3 firmware is