bootloader-dat

• xboot-dat - xfel-dat - uboot-dat - sunxi-fel-dat

• buildroot-dat

• TINA-dat - allwinner-SDK-dat

On Allwinner/Sunxi boards, the bootloader (often U-Boot) loads:

• Kernel image (zImage, uImage, etc.)
• Device Tree Blob (*.dtb)
• Boot script (boot.scr or boot.cmd)
• Root filesystem (from SD card/eMMC partition)

ref

• F133-dat