Like you, I have a Elph 300 HS (V1.0.1A) that I would like to get ported.
I have some coding and IDA disassembling experience, plus some ASM basics (x86 not Arm). On top of that, I have the feeling that the version done for the Elph 100 HS (the little brother) should be quite close to what we need, considering that the 2 cameras are very, very similar.
However it would really help me to have some advice on where to start. Yes I read the wiki about it, but for example I'm not able to find the source code of the version made for the elph 100HS in the svn.
I already have dumped my own firmware. Now , any suggestion ?