Subject: Re: [stella] Perfect BIN copy protection From: Thomas Jentzsch <tjentzsch@xxxxxx> Date: Sun, 3 Feb 2002 17:15:37 +0100 |
At 03.02.2002, 16:08, Eckhard Stolberg wrote: >> Yes, we would have to rely on certain values of some 2600 registers >> after the game starts. Sure that could be changed by clever people too. > As Chad has already hinted, there is a rather simple (well, simple > for the people on this list, that is ;-) ) way to put the Cuttle > Cart in any state you want before you hand over control to the game. > (OK, not any state, but more different states than you would want > to check for in your game. ;-) ) All you have to do is to chose a > contol byte value that leaves the Cuttle Cart in Cuttle Cart mode, > and to add some code to the game that sets the VCS in the correct > state and then locks-in the right bankswitching type. I knew that you're one of the clever ones. ;-) > I'm not offended by your question, but I don't own a Thrust > cartridge either. But that's because I really stink at that > game and not because I can play it for free on my Cuttle Cart. > In fact I usually only load it into my Cuttle Cart, when you > ask me to. ;-) I hope my questions didn't cause you to much pain. ;-) > But I must shamefully admit, that ever since I started programming > for the VCS and VCS emulators, most of my interest in (homebrew) VCS > games is in the technigal aspects rather than the gameplay. For most > games I just want to know how it was done and if the emulator supports > is properly. One game I was seriously interested in buying was Jammed. > But I decided that I liked my multi-colour version of the game better, > and as long as I'm still not finished playing the original board game > levels on that one, I'm probably going to wait before I'll order Jammed. ;-) Don't hurry, Jammed will wait for you! :-) > I think the CC lock out was just a side effect of the hacking > protection code that Manuel added to Gunfight. When people > reported to him that the game wouldn't work on the CC and > I explained to him why that was, he thought that limiting > the freely available binary to the emulators was a good idea. > So I guess it's partly my own fault. ;-) And IIRC, I started that hacking protection idea, when I discovered that in some Video Gems games while converting them from PAL into NTSC format for CC use. That closes the circle, doesn't it. :-) > I think that a simple hack protection, like th one in Gunfight > are a reasonable idea, even if only to force the hackers to > learn VCS programming. ;-) I don't expect that will happen, but who knows? > But I think once someone knows how > to program the VCS, he will appreciate the work that went into > the game and most probably will respect the wishes of the author. > So I don't think you should scramble your code too much. After > all Manuel and you have disassebled many VCS games yourself and > learned quite alot through it. Therefore it would be nice, if > you'd give the chance to learn from your code to new generations > of VCS homebrew programmers as well. Sure, that's why I'm releasing my own source codes and all the disassemblings it did. > I think Simon's plan is to release the binary after the first > linited edition run of cartridges has sold out. He just wants > those customers to be the first to play the game (execept for > him and his beta testers of course). That's my idea behind Jammed too. I will wait some time after the Hozer release of the cart and then release the non-demo binaray and the complete source code to the public. > As for the EbiVision games, I'm sure once the games were > released in cartridge form, the ROM completists already had > them in their collection. After all they are even trading > every buggy little test program from this list. ;-) I think, they all are very honest, because (except for Merlin's Walls) I never saw a EbiVision ROM anywhere. Even the latest Good2600 ROM renaming tools doesn't know them. Have fun! Thomas _______________________________________________________ Thomas Jentzsch | *** Every bit is sacred ! *** tjentzsch at web dot de | ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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