[howto] Switch boot partitions via micom eeprom C series

[hedak]

OK, thank you! Micom EEPROM has 256 byte (or 2kBit ). Will dump and upload tomorrow

[hedak]

So, here's my micom's EEPROM dump. It's the same in standby and powered on.

[juusso]

heyyy. your eeprom just looks like i have suggested to user to change bytes in eeprom topic.

in your case you have to set it vice versa

[juusso]

77 .... B0 change to CD .... AD

[hedak]

jup, but i want to disable the watchdog first

But i'm failing right now... Executing 'http://IP/read?format=1&device=80&size=32768' works, but adding the address option neccesary for write command (-> 'http://IP/read?format=1&device=80&size=32768&addr=0') fails reading?! I will investigate the sketch

EDIT: my working teensy sketch can be found here: http://wiki.samygo.tv/index.php5/Ethern ... _interface

[juusso]

unplug from wall after change bytes in micom's eeprom

[hedak]

OK, and i will try to write in standby, right? DONE

Please check my dump after changing as supposed. I won't disconnect from wall until you checked and agreed

[juusso]

seem ok. but why don't you change just these bytes instead of full dump?

[juusso]

Summary:

Switch to 1st boot partition set we have to change as follow:

SpoilerShow

00000000 CD 01 FF 01 FF 04 01 01 00 FF 73 70 61 FF AD FF ?.?.?....?spa?.?
00000010 FF FF 00 FF FF FF FF FF FF FF FF FF FF FF FF FF ??.?????????????
00000020 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ????????????????

Code: Select all

>> ONBOOT :: 0x81c60204 0x12821284 

1nd Partition !!!!!!!!!!!!!!!!!

To switch to 2nd boot partition set, have to use:

SpoilerShow

00000000 77 01 FF 01 FF 04 01 01 00 FF 73 70 61 FF B0 FF ?.?.?....?spa?.?
00000010 FF FF 00 FF FF FF FF FF FF FF FF FF FF FF FF FF ??.?????????????
00000020 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ????????????????

Code: Select all

>> ONBOOT :: 0x81c60204 0x12821284 

2nd Partition !!!!!!!!!!!!!!!!!

Case solved. hope this info helps for someone in future.

[hedak]

To complete my case i attached both states (1st active and 2nd active) as dumps of my micom EEPROM. Mind attachement comments.

Just for information: if you compare both that dumps with the one i posted previously (Micom_EEPROM_after_toggle_try.zip) you will figure out that the ascii string 'ger' changed to 'eng'. The reason is that tv was set to german before my tv's brick and after unbricking it let me walk through the setup-up steps where i chose englisch to quickly pass that. juuso' dumps show 'spa' so that dumps will most probably have been made on a tv set to spanish