I just can imagine :-) I also learned after that some protections used undocumented processor instructions or edge cases of some... But back in the days, you had no internet, access to documentation was not easy esp. if you were young... So although I regret the lack of friends-like-me by that time, I also appreciate the various tricks of the trades that I've learnt then... Now I write python... That's much easier but it makes programming so much more mundane. Bah, another time, another story :-)

stF