Subject: Aw: Re: Re: [stella] Gunfight 2600: Final Release Version From: cybergoth@xxxxxxxx Date: Wed, 21 Nov 2001 18:24:49 +0100 (CET) |
Hi Eckhard! > > Rats! I knew I should've implemented those tests > > checking if the routine is still intact! > That wouldn't have helped much. Eventually all checksumming > mechanisms go to a point where they have to decide wether to > branch into the main game loop or not. And this code can > always be manipulated by hackers. Well, what I wanted to do was something like that: Replace: RTS With: RoutineIntact RTS and on any point later I'd do something like LDA #<RoutineIntact CMP #RTS BEQ fine bailout fine Again I'm sure that most readers _here_ could detect/remove this or similar. But the casual graphics-hacker stands absolutely no chance. > > Apart from that it's good to know that everything works fine > > beyond that obstacle... :-) > After actually playing the game a bit, it seems that the > background in the PAL version is rather bright. It might just > be my TV, but maybe you could try something a little darker > before releasing the game? Ok, I'll do that. > > As for the "hacking prevention code": That really is exactly what > > it is intended to be. > > > Of course I'm aware that anybody on this list is able to remove > > that code in next to no time, but I'm sure it prevents 99% > > of the editgfx users from turning my cowboys into Bin Ladens... :-) > I don't know, but after you have posted all the almost > finished beta versions here this seems pretty pointless. > Anyone who really wanted to hack your game without your > permission could just use a beta version and get almost > the same result. Well, you're right. But then these 'Kabul' hacks didn't emerge before the WTC desaster... Apart from that, I sure that people _here_ won't missuse any old BINs for hacks. And one needs to have public betas anyway. And then there's always a difference between _any_ beta and _the_ final version :-) > > Do you know where and why the checksum differs? > It seems that both the Cuttle Cart loading routine and the > modified 7800 BIOS start the game with the carry bit being > high. I don't know how it is on a normal 2600/7800 though. > Maybe the 6502 starts up with the carry being low, but at > least on the 7800 with it's BIOS, it might get changed to > high as well. Aha. Good to know. Greetings, Manuel ----------------------------------------------------------------------- 70 Cent und keinen Pfennig mehr - Handyklingeltöne bei Arcor! http://www.arcor.de/pc/05_03_pc_handy.php ----------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: [stella] Gunfight Label Contest, Clay Halliwell | Thread | Re: [stella] Copy Protection, Manuel Polik |
[stella] Copy Protection, Glenn Saunders | Date | Re: [stella] Copy Protection, Manuel Polik |
Month |