I'm not sure anyone bothered, as these robots were fairly unimpressive
when it came to their programmed play. It would probably be easier to
stick in a small PIC or AVR. I've seen some Rumble Robots "autopsy"
sites here and there, but it's been a while.
I once looked at the barcode for these and felt there were too few data
for actual coding. I think the only information contained on them is an
identification of the invidual robot, a "level" of some type (like
power), and an action. The programming is already in the little blob
micro on the main board, so at best all you can do is input different
combinations of what's already there. I seriously would doubt you can
add anything new.
Not that trying to hack the code isn't interesting in itself, just that
once you do I'm not sure what the prize will be when you get there! The
mechanicals of these things are great, though.
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