Rockbox Development > New Ports
iAUDIO U3 (formerly New hardware--scans...)
Llorean:
http://www.rockbox.org/twiki/bin/view/Main/NewPort
Feel free to start an effort.
vitja:
Hi, all!
I found something about original firmware package. it contains: data[1-3].dat and executable, that
actually copies files to player.
data1.dat - is new firmware, it should be copied to the players root as U3_fw.bin
data2.dat - is font upgrade, U3_font.bin
data3.dat - is 1.12 firmware
Now firmwares 1.13, 1.21 could be downloaded from cown site, so we have 3 different firmwares to play with.
I was trying to modify firmware, but I didn't find what kind of checksum is used there.
tcc770 is based on arm946e-s, here is datasheet: http://rtds.cs.tamu.edu/web_462/techdocs/ARM/cores/DVI0022A_946E_S(R1)_po.pdf
One question: is there o-s arm binary disassebmler? I've written the one based on binutils, i guess that is should be already written.
nilux:
Hi there, it's my first post here :D
I'd be *really* interested in an iAudio U3 rockbox port and would like to help make it possible, so if there is anything (not to complicated : i can open my unit, but i'm not that good at electronics; i have no problems typing commands in a terminal but i can't code) i could do, just tell!
You talked about disassembling the firmware, what does it exactly mean?
markun:
http://en.wikipedia.org/wiki/Disassembler
cerr:
I downloaded version 1.21 from http://www.cowonamerica.com/download/iaudio_u3_jsfw.html (even tho my player's been loaded with 1.26 by default) and tried to disassemble it using dasm2 (http://www.lxtreme.nl/index.pl/source/alive/dasm2#download) but all i'm getting is "../cowon/U3_FW_1.21/data1.dat: File format not recognized". Has anyone had any success decompiling it? If anyone came up with a disassembled piece, I would run it thru a decompiler and go from there. I would be ready to contribute some coding...
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