TCAS, WINDSHEAR and EGPWS warnings donīt come from the FWC according to the following:
FCOM 3.02.31P3 FWS FWC 1+2 FAULT:
Not Avail:
Ecam Warning
Altitude Alert
Status
Altitude Call out
Memo
FCOM 1.31.05P2
The FWC also generate Radio altitude call outs, DH callouts.
Correct me if I missed something
As for the DDRMI, I understand that the tunned radios are the same that are set on the Radio Nav Page. If you use the RMP to set the Nav Radios because of FMGC failure, then you are also tunning the DDRMI.