Rockbox Development > New Ports
Ingenic Jz4740/Jz4732 players
ocean:
i've just bought a 747+ (if it is of use is DXT VX747+ fw version 1.0) clone that is for sure chinachip/jz47**, though there isn't a firmware backup in the cd included with player, wanted to experiment with rockbox/firmware upgrading, but i don't want to break it so i would like to know if there's a way to backup firmware (have done some search but haven't found anything so far only how to write firmware with 747write tool but not how to backup if it is possible at all).
regards
ocean
mcuelenaere:
--- Quote from: ocean on June 19, 2009, 11:43:10 AM ---i've just bought a 747+ (if it is of use is DXT VX747+ fw version 1.0) clone that is for sure chinachip/jz47**, though there isn't a firmware backup in the cd included with player, wanted to experiment with rockbox/firmware upgrading, but i don't want to break it so i would like to know if there's a way to backup firmware (have done some search but haven't found anything so far only how to write firmware with 747write tool but not how to backup if it is possible at all).
regards
ocean
--- End quote ---
The VX747, VX747+ and VX777 firmwares are interchangeable (they're mostly the same hardware); so if you would brick your device it is still reparaible through the OF (Original Firmware) recovery software.
Also, currently Rockbox doesn't require you (and it isn't possible either) to flash it to your device, it is purely run from RAM and gets it data from an SD card.
edit:
To all people who are having trouble with SD(HC) cards: I finally got myself an 8GB SDHC card which triggers the ATA -1 or ATA 18 behaviour; expect a fix soon.
ocean:
--- Quote from: mcuelenaere on June 19, 2009, 12:09:34 PM ---The VX747, VX747+ and VX777 firmwares are interchangeable (they're mostly the same hardware); so if you would brick your device it is still reparaible through the OF (Original Firmware) recovery software.
Also, currently Rockbox doesn't require you (and it isn't possible either) to flash it to your device, it is purely run from RAM and gets it data from an SD card.
--- End quote ---
i already read about 747write (that's the OF recovery software linked in the wiki) but it needs the original firmware (or am i wrong?), i don't have access to the original firmware (that clone produced by DXT don't include it in the cd), so it would be nice if there's a way to access (rebuild?) the original hxf (to avoid losing possible customization to the firmware done from the clone factory), maybe usb/jz4740 tools can be used somehow?
mcuelenaere:
--- Quote from: ocean on June 19, 2009, 12:39:43 PM ---i already read about 747write but it needs the original firmware (or am i wrong?), i don't have access to the original firmware (that clone produced by DXT don't include it in the cd), so it would be nice if there's a way to access (rebuild?) the original hxf (to avoid losing possible customization to the firmware done from the clone factory), maybe usb/jz4740 tools can be used somehow?
--- End quote ---
Hmm yes, well you can't access the OF as the NAND FTL isn't figured out.. And the OF HXF is stored somewhere before/after the FAT partition on the NAND..
There is access to raw NAND though, but unless you have access to what FTL Chinachip used I don't think it's of any good to you..
But like I said, currently Rockbox doesn't require any changes to the NAND (in fact, NAND write access is disabled in the Rockbox driver) and it's purely run from RAM over USB (+ SD for storage).
(edit by funman : replace FLT by FTL -Flash Translation Layer-)
ocean:
i'll try running latest rockbox build on ram.
btw, since it's stored on the nand, couldn't it be possible to read "behind the fat partition" with a raw read, for example from linux /dev/ (i don't know why but my linux 2.6.30 doesn't recognize the fat partition, while recognizes the sd card partition, windows recognizes the fat partition so maybe "the answer" is in the windows driver?).
thanks for being so patient replying to my questions.
regards
ocean
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version