24 Jun
2013
24 Jun
'13
12:04 a.m.
Quoting Cory Smelosky <b4 at gewt.net>:
As I said, it was very dark ;-)
If you download it and run it from RAM, it could be encrypted ...
Just a shot in
the dark, but the cheapest copy protection is to flip some
bits on the data bus. If you read a PROM on a programmer, all you see is
garbage, until you figure out how the data bus was connected.
That's possible, but the image is loaded via MOP or tftp...so that'd
either require instructions to flip the bits or an executable to flip
them, no?
Or....off the flash card.
> Usually, nobody wasted the money to copy the ROM into an expensive SRAM
> to run it ...