Set information in the vf like ! - possible?

[Marsu42]

Are there any hooks at all to set information in the viewfinder, line the ! symbol next to the battery that the 6D has?

If so, it would be very useful for other purposes than Canon intended but as a signal from ml w/o needing to take the eye off the vf.

[a1ex]

I believe this display is controlled by Tx19A (a smaller CPU; we don't know much about it).

http://magiclantern.wikia.com/wiki/Tx19a

[Marsu42]

I believe this display is controlled by Tx19A (a smaller CPU; we don't know much about it).

Oh my, there goes the neighborhood :-( ... But thanks for the answer, I already read about this I guess, just wanted to double-check now that I'm producing some actually useful ml code.

Aren't you clever people able to disassemble what the Canon fw does when they put ! into the vf and call the same routine? I really don't know if ml is just able to use exposed Canon dryos hooks, or if you can also hook into or call more hidden fw functions.