TS-7840 U-Boot
From embeddedTS Manuals
U-boot is a bootloader and comes preinstalled on this board. This is loaded in the eMMC hardware boot partitions in /dev/mmcblk0boot0. U-boot sets up the hardware, initializes ECC by scrubbing RAM, and then loads the OS from the available storage devices. Most users will not need to customize u-boot further, and can proceed to the #Debian sections for information on application development.