content: This used to be one of my tricks cracking copy protection on the Atari ST. You'd step through the bootcode until you saw the jmp/bra to the protection routine and find where the routine would return a magic number if it passed the check, and just return it instead. The crafty games would try and make the problem intractable by having multiple checks throughout the game, so it involved quite a bit of slogging through assembly code. Happy days at 14 years old, sitting in the dark so as not to wake my parents in the next room, stepping through assembly with a mug of coffee.