Board. Sadly no labeled UART points. Bunch of unlabeled test pads on the back, mooostly corresponding to connectors. But maybe I could find TX by touching all of them..?
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On the other hand, decompiling LK reveals what exactly it expects from the device tree…
The first problem was that this tablet's LK absolutely needs a signature (`avbtool add_hash_footer` with any random key is […]