% sudo cu -l /dev/cu.usbserial-A50285BI -s 115200
[0000.130] [TegraBoot] (version 00.00.2014.50-mobile-d44d4bf0)
[0000.135] Processing in cold boot mode Bootloader 2
[0000.140] A02 Bootrom Patch rev = 63
[0000.143] Power-up reason: reset button
[0000.147] No Battery Present
[0000.150] RamCode = 0
[0000.152] Platform has Ddr4 type ram
[0000.155] max77620 disabling SD1 Remote Sense
[0000.159] Setting Ddr voltage to 1125mv
[0000.163] Serial Number of Pmic Max77663: 0x2905ae
[0000.171] Entering ramdump check
[0000.174] Get RamDumpCarveOut = 0xff23f000
[0000.178] RamDumpCarveOut=0xff23f000,  RamDumperFlag=0xffffffef
[0000.184] Last reboot was clean, booting normally!
[0000.188] Sdram initialization is successful 
[0000.193] SecureOs Carveout Base=0xff800000 Size=0x00800000
[0000.198] GSC1 Carveout Base=0xff700000 Size=0x00100000
[0000.203] GSC2 Carveout Base=0xff600000 Size=0x00100000
[0000.208] GSC3 Carveout Base=0xff500000 Size=0x00100000
[0000.213] GSC4 Carveout Base=0xff400000 Size=0x00100000
[0000.219] GSC5 Carveout Base=0xff300000 Size=0x00100000
[0000.224] BpmpFw Carveout Base=0xff2c0000 Size=0x00040000
[0000.229] Lp0 Carveout Base=0xff2bf000 Size=0x00001000
[0000.244] RamDump Carveout Base=0xff23f000 Size=0x00080000
[0000.250] Platform-DebugCarveout: 0
[0000.253] Nck Carveout Base=0xff03f000 Size=0x00200000
[0000.258] Non secure mode, and RB not enabled.
[0000.288] Using GPT Primary to query partitions 
[0000.293] Loading Tboot-CPU binary
[0000.342] Verifying bootloader in OdmNonSecureSBK mode
[0000.352] Bootloader load address is 0xa0000000, entry address is 0xa0000258
[0000.359] Bootloader downloaded successfully.
[0000.363] Downloaded Tboot-CPU binary to 0xa0000258
[0000.368] MAX77620_GPIO1 Configured.
[0000.372] MAX77620_GPIO5 Configured.
[0000.375] CPU power rail is up
[0000.378] CPU clock enabled
[0000.382] Performing RAM repair
[0000.385] Updating A64 Warmreset Address to 0xa00002e9
[0000.413] Bootloader DTB Load Address: 0x83000000
[0000.441] Kernel DTB Load Address: 0x83100000
[0000.446] Bootloader is not valid
[0000.449] Error in NvTbootLoadBinary: 0x14 !
[0000.453] GPT: Partition NOT found ! 
[0000.457] Find Partition via GPT Failed
[0000.460] Find Partition via PT Failed
[0000.464] function NvTbootGetBinaryOffsets: 0x1 error
[0000.469] Error in NvTbootLoadBinary: 0x1 !
[0000.472] Error is 1