
Originally Posted by
quzar
There are a few points to be made here. First, it IS possible to have un-crackable security for the PSP. All they would have to do is make it impossible to boot code from the memory stick or usb. THEN you'd have to do some crazy things like use some random game, but if they do it properly it would be possible to simply not allow it at all.
The second thing is that, yes homebrew firmware/bios IS possible, but would require horribly intimate knowledge of hardware and all it's functions. If someone hacked the firmware and modified it (which hasn't been happening) then that would simply be illegal. So far no firmware for the psp has been cracked or hacked, the only thing that has been done is workarounds made to work with the firmware as it already exists on the system (to my knowledge). The main obstacle is finding out how sony does the security on the updates, which would require something along the lines of monitoring data transfer during the update routine and analyzing it. The problem with this is that unlike most things, if data is corrupted or fails to be passed correctly here, it could result in a useless psp.
The best BEST way to do this would be to take the psp firmware, modify it, then pull the chip that holds the firmware inside the psp and replace it with a flash rom. When you have done that you upload your custom bios that has different debugging features and go to initiate an update and track how the update occurs. An alternative would be to try to use the firmware chip already inside the psp, because it would already have to be of the flash variety to be able to update, but there is a chance there is some sort of hardware protection on it against such a thing.
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yea, that's it.
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