how to choice fallback or normal image?

[Terry B. Chen]

Dear all:
         I was puzzled by the fallback and normal image in s2722
(e7500), I am sorry to ask so simple question. When shall we use the
fallback image and when shall we use the normal image? How you control
which to run?
         The register DRC (7c) bit 29(Init complete) seem not to be set
after memory initialization complete. am I right?
Thank you!