Originally posted by ExCyber@Thu, 2005-03-24 @ 07:51 PM



I tried this a couple years ago, more or less. I'm not sure exactly what you mean, but it did not lose tracking (= spin up way too fast) as it does with most games, it acts pretty sanely and the pickup kicks around on the outside for a while, presumably trying to read the signature. After a little while it eventually popped up with "Game disc unsuitable for this system"). This is from memory so details may be wrong...



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			so they use these bytes in the sector to draw the image/text whatever.Im sure as a judge on this!
		
		

	

	
	

		
		

			What would be kewl is actaully be able to recreate the sega logo, which is certainly possible
		
		

	

	
	

		
		

			Originally posted by ExCyber@Fri, 2005-03-25 @ 07:07 PM



I've been about 95% sure of this ever since I read the patents, but people keep trying to tell me it's some kind of secondary optical/holographic sensor. Heh.



Also according to the patents, the whole point of the protection scheme is to make pirate/unauthorized manufacturers put a visible Sega logo on the disc so that they can be prosecuted under trademark dilution laws, so I guess Sega thought it was possible too...



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			Originally posted by mal@Fri, 2005-03-25 @ 12:29 AM



What makes you say that?
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			Originally posted by Drenholm@Sat, 2005-03-26 @ 05:09 PM



Are there not two boot discs; one for Sega games and one for third-party games? Sorry if I jumped to conclusions there - I'd appreciate clarification. 



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			Originally posted by Drenholm@Sun, 2005-03-27 @ 12:32 PM



Thanks for the reply, Runik, but if you're right, what would be the point of having two boot discs[question_mark]



Do they insert code into the Saturn's memory which will subsequently check the publisher of the game on the CD-R and only boot it if it meets the necessary requirements[question_mark]  I'm confused!  



On another note, I posted this thread... at CDFreaks asking for any help.  I don't think they quite 'got' what I meant... but what can ya do.  



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			This version adds an additional feature: the ability to specify starting position (expressed in LBA) when writing data to CD. It will allow you to tell the writer to start writing the lead-in at any position you specify. This will allow you to skip a portion of blank space at the beginning of the CDR/W. Example, if you specify -200, then you will end up with a blank gap where the lead-in should normally be - in other words the lead-in and all data following are shifted ahead.
		
		

	

	
	

		
		

			Added a skip sector position file support in the 'Image To CD' area. The file is a text file with a list of starting sector and length to skip for the blank areas you wish to be on the CD (this means no EMF data is written in those areas). The format is as follows:



starting sector in LBA unit,skip length



Example file skip.ssp:



100,150



200,10



300,50



The first line means don't write anything at sector position 100 for 150 sectors. The second line means don't write anything at sector position 200 for 10 sectors.
		
		

	

	
	

		
		

			Originally posted by Quakester2000@Wed, 2005-03-30 @ 12:06 AM



I have no idea if a cdwriter / dvd reader will be able to even read the outside track especially if its non standard in some way. Also im betting finding the position of the track would be hard.



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			Originally posted by Runik@Wed, 2005-03-30 @ 08:09 AM



I've tried Daytona USA with both drives (a Plextor CD writer and a Pioneer DVD writer), and I couldn't access to the supposed track area.



The last readable sector is situated around 177888 IIRC, and nothing past that is readable : it returns a read error up to around 270000 (which is supposed to be the track position, after a quick calculation ...)



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			Hey guys hows it goin'. Well over at www.chanka.org... (the homepage of the Dreamcast Emulator Chankast) there's a topic discussing ripping a GD-rom using an ordinary PC CD-rom drive. I didn't have much luck ripping my GD-Roms (my current swapping drive sucks) but the same method was the key to read all the way out to where that dreaded Saturn ring is. I tried it out and lo and behold i got data off from there (it's gotta be the protection what else could it be?!). Anyways what I did was open up my drive and left the naked tray and everything showing allowing me to physically swap discs. I burned one with an illegal TOC (Table of contents) that shows that it has over 1 gigabyte of Data Mode 2. I chose mode 2 since someone at sega xtreme mentioned something about that data being mode 2. Anyways I used Trumans Tool (amazing tool btw) to get out as far as I could until I could find something and I started getting something at sector 297683. So I made an image with Trumans Tool starting at sector 297683 and it went all the way out until sector 328348 which is exactly 72.9662 minutes (that's where it ends). I tested it on a Mortal Kombat II game. I did the same thing with the game Nights, and also Sonic Jam which gave the same results (always ended at 328348). But now the hard part is figuring it out how to burn it on a cdr. Because when I go to burn image to cd I click on "Specify Start pos (LBA)" and input 297683. I leave all the other options alone which results in the "Lead-in Format" option being at "assume audio CDDA (no scrambling), "Sector Skip method using" no skipping, and write speed max. When it burns on an already burned copy of Nights, it finishes succesfully but I notice the status reading all the way out to sector like 390000 which is way to far (when I extracted the data "protection" it only ends at 328348 so why is it that when I burn it, it's burning all the way out to 390000+? I know it aint that long so whats wrong?). When I do take out the cdr and look at it I notice that there is a ring burned on there and it does seem to be in the same spot as it would be on an original factory saturn game. But when I swap the cdr into my swapping drive and try to extract the ring from the cdr it doesn't read anything at sector 297683 like it would on the original nor will it read anything past that. So what did I do wrong when I tried burning the "protection" onto the cdr?



I forgot to mention that I made a .iso image (using CDRWIN and specifying secstart and end on) and I'm also trying to figure out how I could possibly make a multisession disc burning the game+ the protection where it should be (the protection should start at exactly 66.151777777777777777777777777778 according to the windows calculator). How could I specify the cue sheet to burn the protection at that position? Also how could I edit a .ccd (clone cd cue sheet or whatever you call it) to burn the protection at that position if aint possible with a cue-iso. It might give better results too concerning the fact that you can make a disc with an illegal TOC. Any help would be greatly appreciated
		
		

	

	
	

		
		

			Originally posted by Drenholm@Fri, 2005-04-01 @ 09:44 AM



I saw that already, but didn't get round to quoting it. 



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