Quote from: fe50 on 15 / October / 2009, 01:37:55Added the following two new firmware dumps to the drop.io - chdkdumps2 backup archive:SX20 1.00F (4MB dump, blinked out by neszt, from this post) http://drop.io/chdkdumps2/asset/sx20-100f-7zThis dump apparently contains unspecified "stuff" left by unspecified tools, and so for all practical purposes is corrupted.If a dump is not a byte for byte copy of the actual ROM, this should be mentioned somewhere.
Added the following two new firmware dumps to the drop.io - chdkdumps2 backup archive:SX20 1.00F (4MB dump, blinked out by neszt, from this post) http://drop.io/chdkdumps2/asset/sx20-100f-7z
Yes, I've been working on getting a firmware dump for the past week. I used the firmware update (PS.FI2) method and a few adjustments to get the program running - started out with the udumper source code:a. added "MOV R11, #0" to entry.S before the branch to mainb. pre-padded the unencrypted diskboot.bin with 1636 NOP instructions - the code didn't seem to execute otherwise, either part of the file is stripped or the executable has to have a certain size.I found the AF_LED at 0xC02380C3 by the usual method, strangely 0x00 must be used to turn it off (instead of 0x44). Originally I scanned 0xC0200000 - 0xC0200100, where I found the flash (that's how I knew the program was working) and proceeded to build an IR receiver (simple enough) and transmit/receive data from the device. You can get the firmware here: http://rapidshare.com/files/325920475/A480_100b_PRIMARY.7z.html (only 10 downloads available?) or here: http://www.easy-share.com/1908828842/A480_100b_PRIMARY.7z
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