Cowon S9

[apoelstra]

As near as I can tell there a port for the S9 has not been started yet.

The basics:
Processor: TCC7901 (tcctool works)
RAM: Hynix HY5S7B2ALF 512Mb
Flash: K9HCG08U1M 8Gb
Power: PCF-50633
Codec: WM8750L
Bluetooth: CSR-41814

To brick/unbrick it use tcctool. Setting the SDCFG to 0xa1102800 and flashing the Cowon firmware let me get the player back but I made some mistakes calcuating it so I'm not super confident in it.

Edit:
I have setup a wiki page:
http://www.rockbox.org/wiki/CowonS9Info

[apoelstra]

I have successfully compiled a S9 bootloader and can program the S9 with tcctool. Right now I simply have a copy of the D2 firmware with SD support disabled. I am using the arm-eabi toolchain.

Using mktccboot to create a "dual-boot", I find that the S9 is completely dead - it will not show up in lsusb and doesn't read the lock status correctly to boot into the manufacturer firmware.

Writing the bootloader directly to the S9 with tcctool is interesting: it locks up my USB driver, so that if the player is plugged in, lsusb (and usbmon, and usbdev, and ...) will simply hang until I unplug the player.

There is a thread on iaudiophile about this (I am posting as joeyg). It looks like nobody else has gotten this far - others have bricked players that they cannot get back. If you have any information about bricking and unbricking S9's, please let me know.

Thanks
Andrew