The ECC is the protection that keeps the PS3 from booting with a custom flashed rom. These folks managed to reverse the code. This means that they can now generate custom ones to allow the rom to boot. They haven’t gotten very far with that side of it yet, but they did manage to rescue a broken PS3 with it. They had one that had a bad flash, they were able to re write the code in it and it booted right up.