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Messages - firexball

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Tutorials and Creative Uses / Re: Firmware Update/Downdate?
« on: April 10, 2020, 11:14:45 AM »
Well, it's more like putting a Bugatti Veyron sticker on a Prius and make someone believe ist a Veyron. That's not impossible.  :P
I don't think the Firmware check is that intelligent...

Tutorials and Creative Uses / Re: Firmware Update/Downdate?
« on: April 09, 2020, 09:22:59 AM »
I now have a 5D3 with 1.3.6 after a repair... >:(

I'm not a programmer (just a bit), but wouldn't it be possible to take a firmware of 1.3.5 and "rename" it to 1.3.7 so that it is possible to run an "update" to this Firmware in the cam?
I tried it by renaming and changing the version in the file with an hex editor... as expected no success. The cam tried to update but then stopped, because there is a checksum somewhere in the file. If there would be a possibility to correct this checksum...

After installing the 1.3.7 Version of the 1.3.5 firmware, there would be the chance to downgrade to 1.2.3.

Any suggestions? I would try...

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