NSFW wrote:
Seems to me that anyone who provides a full assembly language listing would be on thin ice, legally speaking.
It's probably safe to post excerpts with commentary - I think that would be covered under "fair use" just like posting an excerpt from a book you're commenting on - but still... I think they key problem is that nobody wants to hire a lawyer.

Nonsense. FHI probably uses a high-level language whose processor generates the machine code directly, which means an assembly file is likely never created. How could you copyright something that doesn't exist? Also, nobody seems to have any qualms or compunction about posting ROM images here, and those DO contain a copyright notice.
In practice, posting large chunks of assembler code isn't the best way to explain how the software works. Pseudo code and/or flowcharts work better.
Tgui wrote:
I'm sure IDA pro would be needed for the easiest hacking, though a listing and howto using free tools would be best. Pipe dream I know.
There are a couple of free disassemblers which claim to support the Hitachi/Renesas SH 2 processors. One is near the bottom of the page at
http://forum.rpc1.org/dl_utility.php. The other is near the middle of the page at
http://www.rockbox.org/tools.html.