One of the problems in learning the new avionics, i.e ATA 42, 44, 45 and 46 is to get a suitable reference or notes. For that reason, I rely on the internet to get the note from Airbus and Boeing. In most cases, I prefer to search for A380 note.
Here are the example:
A. ATA 42 - Integrated Modular Avionics
a. I will search for "A380 ATA 42 note"
This is what I get....
The information is enough to get me started.