Before NAND Partition Change ==>  PT Version change method

Previous 1 : tftpd32.chm / tftpd32.exe / eftpd32.ini  directory => copy
             ,boot file & nand file same directory => copy
             execute the tftpd32.exe file

Previous 2 : PC & system direct connect, serial port connect
             PC IP => 10.10.10.xxx set, system default - 10.10.10.2                                  

Previous 2 : Entering boot mode by "CTRL-C" after Reset.

        eMG80-MBU>printenv + enter ==> set up check and show the status       
        eMG80-MBU>setenv serverip 10.10.10.xxx(your PC IP) + enter ==> serverip set up
                  setenv ipaddr 10.10.10.2(System IP Address) + enter 
        eMG80-MBU>saveenv + enter

1) u-boot update (to PT version)

eMG80-MBU>run updateboot + enter

2) Board reset and entering to the boot mode again by command "reset"

3) Kernal/Boot parameter change 

eMG80-MBU>setenv flashargs 'setenv bootargs init=${init_process} root=/dev/mtdblock2 rootfstype=${rootfstype} rw' + enter
eMG80-MBU>setenv bootargs + enter

eMG80-MBU>saveenv + enter

4) eMG80-MBU>nand erase.chip + enter

5) Board reset and entering to the boot mode again by command "reset"


6) eMG80-MBU>nand erase.chip + enter

7) eMG80-MBU>tftpboot 81000000 nand0-emg80-mbu.bin + enter   <== MBU upload

8) eMG80-MBU>nand write.yaffs2 81000000 0 $(filesize) raw + enter <== Nand writing

9) Board Reset