release
dev builds
extras
themes manual
wiki
device status forums
mailing lists
IRC bugs
patches
dev guide



Search | Go
Wiki > Main > SanDisk > SansaE200Port > SansaE200R (r18)

The Rockbox Sansa e200R/Rhapsody Port


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.

Install

There are special instructions for the installation procedure on the R versions of the e200 series here.

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.


Edit | Attach | Print version | History: r19 < r18 < r17 < r16 | Backlinks | View wiki text | More topic actions...
r18 - 02 Jun 2008 - 00:18:31 - MarcGuay
Copyright by the contributing authors.