Rockbox Development > New Ports
SAMSUNG YH-920
pyro_maniac:
--- Quote from: Nichlas on December 23, 2009, 06:55:03 AM ---O sorry forgot to post the rom.
I used the dump rom content in the debugg menu to get to the janus bootloader.
I might be completley off, but the file generated worked to get the key for the firmware.
Here is a link to the rom file:
http://uploaded.to/file/hb0k8t
--- End quote ---
You talk about the OF debug menu? How did you get access to it?
EDIT: Hmm its a pitty but this bootloader looks only for "SYSTEM\F_YH925J.MI4" nothing else unlike the other ones.
Your dump looks like there are 2 bootloader in the file.
EDIT2: I was right. Your dump seem to include the bootloader and its backup. I attached a .tgz file.
kugel.:
--- Quote from: pyro_maniac on December 23, 2009, 08:51:11 AM ---
--- Quote from: Nichlas on December 23, 2009, 06:55:03 AM ---O sorry forgot to post the rom.
I used the dump rom content in the debugg menu to get to the janus bootloader.
I might be completley off, but the file generated worked to get the key for the firmware.
Here is a link to the rom file:
http://uploaded.to/file/hb0k8t
--- End quote ---
You talk about the OF debug menu? How did you get access to it?
EDIT: Hmm its a pitty but this bootloader looks only for "SYSTEM\F_YH925J.MI4" nothing else unlike the other ones.
Your dump looks like there are 2 bootloader in the file.
EDIT2: I was right. Your dump seem to include the bootloader and its backup. I attached a .tgz file.
--- End quote ---
He probably means the dump rom function in the Rockbox debug menu.
pyro_maniac:
Ok, i hoped it was the OF debug menu.
Nichlas:
Sorry to say that i did use the Rockbox debug menu, it had been usefull i imagine to uncover the OFs debug mode.
Anyway i hope the key and ROM dump can be of some use, i dont have the knowledge to analyze it, but i figure that the key at least can bed added to mi4code, and the minor version of it used in rockbox source. Then one could build a bootloader supporting the booting of the Janus firmware also (why one would want that i don't know) and maybe use triple booting, OF-Janus, OF and rockbox.
If a uniform format is required for rbutil, an instruction to update to Janus for all players could be used and thus making a rbutil with only one bootloader per samsung player?
Hope you all had a good Christmas.
AronVanAmmers:
I can confirm the bootloader from Lowlight (http://forums.rockbox.org/index.php?topic=6135.msg158824#msg158824) works on an YH-925GS with the MTP update. The bootloader should be called F_YH925J.mi4.
I've tried booting the different flavours of original firmware:
* Non-MTP firmware (http://www.samsung.com/download/FileView.aspx?cttfileid=246656&type=Digital+Audio+Player&typecode=8&subtype=Yepp&subtypecode=804&model=YH-925GS&filetype=FM&language=) can boot, but gives the error "database corrupt please connect and run repair util" like Nichlas had.
* I tried to use the Samsung Recovery Tool (http://www.samsung.com/download/FileView.aspx?cttfileid=246636&type=Digital+Audio+Player&typecode=8&subtype=Yepp&subtypecode=804&model=YH-925GS&filetype=SW_cm&language=) to rebuild the library. The tool reports success, but after rebooting the error about corruption is still shown.
Nichlas, any chance you could put the system folder for the original non-MTP firmware you found online up for download so I can try if booting the OF works for me?
* Janus MTP firmware (http://www.samsung.com/download/FileView.aspx?cttfileid=543891&type=Digital+Audio+Player&typecode=8&subtype=Yepp&subtypecode=804&model=YH-925GS&filetype=FM&language=) doesn't boot, Rockbox error messages: "Searching for key." "Can't load /System/OF.mi4"
* Decrypted MTP firmware from Nichlas (http://ul.to/ja8s9x) doesn't boot, Rockbox error message: "Bad checksum"
Personally I'm only interested in the non-MTP OF, because it will re-enable the FM radio which was removed by the MTP upgrade.
Rockbox itself works very well. I didn't encounter any serious issues.
Thanks a lot for this from a new happy Rockbox user :)
Cheers,
Aron
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