I would agree that this problem will not be easily fixed in the secondary
boot program. It's doing SRM callbacks to read and write the ethernet, so
it's going to be very hard to work around an SRM bug by simply doing the
callback with, oh, a delay, a nicely padded frame, or some other random
variation.

And for that matter, the level of inspiration required to do this will make
your problem with the defines look totally trivial.

   --Ross Harvey