|best| - Allwinner+a133+firmware+work

are used for flashing, full support for the A133 in mainline U-Boot is still evolving on platforms like Operating Systems:

: The standard boot flow begins with BOOT0 , which handles the initial chip and DRAM checks before handing off to the main OS. A133 support #207 - linux-sunxi/sunxi-tools - GitHub allwinner+a133+firmware+work

You cannot work with A133 firmware using standard Ubuntu repositories. You need the Allwinner "DragonBoard" or "Tina Linux" SDK, or a mainline build environment. are used for flashing, full support for the

The A133 is designed for power-efficient tablet and smart display applications. are used for flashing