This could be referring to the ROM on the AR6K wireless chip:
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- Some 2DS units have the WiFi chip soldered directly to the board (such as the 2DS in this FCC filing: https://fccid.link/BKE/FTR001N), and some do not.
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- The AR6K ROM only acts as an initial loader.
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- Maybe some AR6K-family devices allow signature checks on the firmware? Or maybe some registers weren't write-once but should have been?
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=== What did SVC 0x74 in the ARM11 kernel do before it got stubbed? ===
=== What did SVC 0x74 in the ARM11 kernel do before it got stubbed? ===