*** Booting Zephyr OS build v2.3.0-rc1-ncs1 *** [00:00:00.003,143] mcuboot: Starting bootloader [00:00:00.009,460] mcuboot: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3 [00:00:00.019,714] mcuboot: Boot source: none [00:00:00.025,238] mcuboot: Failed reading image headers; Image=0 [00:00:00.032,775] mcuboot: Unable to find bootable image *** Booting Zephyr OS build v2.3.0-rc1-ncs1 *** [00:00:00.003,204] mcuboot: Starting bootloader [00:00:00.009,613] mcuboot: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3 [00:00:00.019,866] mcuboot: Boot source: none [00:00:00.025,482] mcuboot: Swap type: none [00:00:00.294,433] mcuboot: Bootloader chainload address offset: 0xc000 [00:00:00.302,276] mcuboot: Jumping to the first image slot *** Booting Zephyr OS build v2.3.0-rc1-ncs1 *** uart:~$