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Wiki > Main > SanDisk > SansaE200Port > SansaE200R

---+!! The Rockbox Sansa e200R/Rhapsody Port

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*If the USB options on your player are "MSC" and "MTP" it's non-R, if they're "Rhapsody" and "Plays for Sure" then it's R.*
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---++ Install
There are special instructions for the installation procedure on the R versions of the e200 series [[SansaE200RInstallation][here]].
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Here follows a summary of the facts and knowledge we have gathered so far about the R models and how they differ from the vanilla e200 models:

---++ Bootloader

   * The R model bootloader loads the mi4 and actually verifies that the 160 bit digital signature is fine before proceeding. Thus upgrading to a custom firmware is next to impossible without replacing the bootloader.
   * The bootloader itself does not allow the bootloader to be replaced (using recovery mode).
   * The bootloader is stored in the same place as in the vanilla e200 model, and is the same size.

---++ Firmware

   * The mi4 image is somewhat differently encoded and encrypted than the vanilla e200 mi4, but we have figured that out already.  Users have managed to run the R model firmware on a vanilla e200 (given some manual adjusting).

---++ e200tool

   * We managed to extract the bootloader code/image from the R models using e200tool in manufacture mode, simply due to the fact that it has a copy of the bootloader in RAM at the time, at the same place in memory as the vanilla models have.
   * We can load custom code to the player with e200tool and run it, so we could extract further info and do testing that way.

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r18 - 02 Jun 2008 - 00:18:31 - MarcGuay

Parents: SanDisk > SansaE200Port