This is a re-posted from the SDM forum.
Re- Porting the EOS M3 Camera
Currently there is no firmware dump available for the EOS M3,
So, dose anyone actually have a EOS M3 camera
And, if so, has been able to do a firmware dump.
There are "TWO" versions of the EOS M3:-
1/ 100d the "Original" Canon release.
2/ 101a the "Up-Graded" Canon release.
The 101a is the version available on CHDK.
The 101a firmware [an encripted.fir file] can be downloaded
from Canon just by entering a valid EOS M3 serial number.
As the minor changes in 101a the "Up-Grade" probably only
relate to Canon EF-? lenses, my guess is that both versions
will boot and run Ok. ??
Also, CHDK, dose not currently support interchangeable lenses. !!!
So, my proposal is to treat the camera as a "Fixed lens" camera but
with several "Options" as below:-
a/ An standard Canon supplied Ef-M Kit Zoom Lens.
b/ The standard Canon supplied Ef-M Prime 22mm Fixed Lense.
c/ Once the firmware for the Ef, Ef-S and Ef-m, communication protocol, is
better understood then support "Additional" Canon Ef-? compatible lenses.
d/ Legacy, but non chipped, Lense "Support" is in my opinion also possible
by simply entering some .....[additional lense] Data.
H-H
Edit #1
With reference to Canons EOS M3 manual and the "Mode" tables.
there are only, four modes ??, that "Support" shooting without a
Lens. These modes could be usefull for the legacy lenses such as the FD series.
H-H
Edit #2 continued in post #54
Edit #3 The 101a version correction (from 101d)
H-H