I don't understand the direction this discussion is taking.
Either you are trying to output the panic information with minimal
hardware, and in a form a human might be able to decode, in which case
the Morse option seems to me to be the best, or you are trying to panic
in a machine readable format - in which case just dump the data out
/dev/ttyS0 and be done with it!
To my way of thinking, the idea of the Morse option is that if an oops
happens when you are not expecting it, and you haven't set up any
equipment to help you, you still have a shot at getting the data.
Trying to dump the oops data out by some form of FSK in most cases seems
silly - if you have taken the time to set up a microphone and decoder,
why not just set up a serial terminal?
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