ac100.nvflash $ ./nvflash --bl ../ac100.sosboot/sosboot-r4.img --sync
Nvflash v1.13.87205 started
chip uid from BR is: 0x00000000000000001700618041410457
rcm version 0X20001
System Information:
   chip name: t20
   chip id: 0x20 major: 1 minor: 2
   chip sku: 0x8
   chip uid: 0x00000000000000001700618041410457
   macrovision: disabled
   hdcp: enabled
   jtag: enabled
   sbk burned: false
   dk burned: false
   boot device: emmc
   operating mode: 3
   device config strap: 1
   device config fuse: 0
   sdram config strap: 0

downloading bootloader -- load address: 0x108000 entry point: 0x108000
sending file: ../ac100.sosboot/sosboot-r4.img
| 4603904/4603904 bytes sent
../ac100.sosboot/sosboot-r4.img sent successfully
waiting for bootloader to initialize