Rockbox Development > Starting Development and Compiling

Sansa Clip+: How to patch the bootloader to the OF

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gevaerts:

--- Quote from: backhome2017 on August 12, 2015, 09:21:39 AM ---Hmmm, I guess I need to get use to the assembler coding but it seems that just changing the register that is being read would do it. Obviously, I am just starting and don't know the intricacies to this.

--- End quote ---

That will be more or less it, yes, but if you get it wrong you can't boot the OF, which means you can't install new firmware any more, which means game over.

backhome2017:
Hmmm. So before I do something crazy, guide me a bit. If I edit the "dualboot.s" file so that for the clipplus instead of reading the GPIO C3 pin as high, it reads, say the GPIO A6 pin (Vol-), would this be the only change necessary to change the dualboot process?

Also, if I did happen to get it wrong and it cannot locate an OF anymore, could I boot the clipplus into "recovery" mode and use an image writer to flash an image and start all over again?? Or would the recovery mode option be dead also?

saratoga:

--- Quote from: backhome2017 on August 12, 2015, 10:18:49 AM ---Also, if I did happen to get it wrong and it cannot locate an OF anymore, could I boot the clipplus into "recovery" mode and use an image writer to flash an image and start all over again?? Or would the recovery mode option be dead also?

--- End quote ---

There is no real recovery mode on the Clip+, so if you brick the player, the only thing you can try is taking it apart, shorting out the flash memory chip, and trying to coax it into booting to USB. 

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