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Looking into the Nintendo Alarmo
While everyone was waiting on news for the successor of the Nintendo Switch, Nintendo released the Alarmo. A small plastic alarm clock that ...
Unfortunately I couldn't read out the STM's internal flash where the system starts running the firmware from, due to a mechanism called readout protection (RDP). When all three buttons on top of the Alarmo are held during boot, the 2ndloader sets up a USB mass storage device with a FAT32 formatted buffer in external RAM. Since we already have the key, there probably aren't many other interesting things we could gain from dumping it, besides of course getting confirmation on how it works.When this blog post goes public, I'm releasing my testing USB payload which performs display initialization and shows a picture of a cat.
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