3 ms·
> A single mov.cc instruction can be patched to remove the voltage limit. However, it's in bootmain, which is signed, so we can't just patch bootmain and flash
by MuffinFlavored 2y ago
> A single mov.cc instruction can be patched to remove the voltage limit. However, it's in bootmain, which is signed, so we can't just patch bootmain and flash the eeprom.
>
> However, as a root linux user on Raspberry Pi full access to system memory, including memory used by the videocore. I mmap'd /dev/vc-mem, searched for the instruction and replaced it, but i'll leave that as an exercise to the reader. I don't want people blaming me if their Pi decides to halt and catch fire.
Does this need to be reapplied every time at boot? Guessing yes...
- jonatron 2y agoYes. Maybe it's theoretically possible to add something to a modifiable part of the eeprom, but that's beyond what I can do in my spare time.