Looks like we hit the jackpot with the M and its firmware dumper.
Thanks to your donations, Bart managed to send the "team" 650D to me to start the new port.
If everything goes according to plans (if the package gets here in time, that is), I'll probably have a 650D hello world by the end of the week
It took more than I expected, but here is the proof of concept:
Welcome to the party, 650D!
May the fun begin...I'll keep you posted