Some questions: XGD3 and iHas and LT+2.0

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deana

Junior Member
Jun 9, 2004
10
0
Hi,

I am a beginner to flashing and I've been trying to figure out this stuff about XGD3 and LT+2.0 but I am still confused. I have a Hitachi 79 and will soon be flashing to LT+2.0.

1. If I use an iHas burner with overburn, is there any problem playing XGD3 backups on LT+2.0? If not, why would I want LT+3.0 when it comes out for my Hitachi?

2. If the image of a backup is less than the maximum 8.5GB, do I still need to use an iHas burner? (since I won't need to truncate on a regular burner)

3. It seems as though all the basic info about AP2.5 and XGD3 and other technical stuff is scattered all over the place and its very hard for beginners to figure out whats going on. Flashing your firmware now has a beginners guide that explains whats going on and introduces you to all the relevant things. Is there any such guide or FAQ that does this for the differences between LT+2.0 and LT+3.0, what AP2.5 is, XGD3, XGD2 are, etc?

Thanks in advance.
 
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t0il3t

Console Guru
Dec 12, 2003
823
0
you drew the short straw with the Hitachi 79. Hitachi 79 only has LT 2.0 and lacks topology support so you cannot play XGD3 backups or XGD2 games with AP 2.5 protection

1. with the iHAS burner you do not overburn, you flash the LT Max firmware to the drive then you can burn the whole game

2. XGD2 games can be burnt with any burner

3. I don't know of any beginners guide so I will try to explain it the best I can

LT 2.0 was the first firmware that supported XGD3 backups, LT 3.0 introduced topology data for AP 2.5 games, back in the LT 2.0 days when the AP 2.5 table was altered in the xboxs NAND you would have to re-read the AP 2.5 sectors re-patch your ISO and burn a new disc. With topology data the firmware can calculate any requested sector to no more re-patching and re-burning

When the 360 first came out the games were on the XGD2 format (Xbox Game Disc) around September last year MS introduced XGD3 these discs can hold more data and all use AP 2.5
 
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deana

Junior Member
Jun 9, 2004
10
0
Thanks for your reply.

To play XGD3 games isn't there that AP2.5 replay sector stuff for LT+2.0b? Practically speaking how's it different from the AP2.5 topology data used in LT+3.0? I mean don't they both play XGD3 games, so how are they different?

From what you have written I inferred that with LT+2.0 I would have to patch the backups ISO with AP2.5 replay sector data but with LT3.0 the firmware would be able to read the calculate the topology data or something so I would not have to patch each backup with the specific replay sector data. Is this correct?

Secondly I have come across the word dae.bin, could you please tell me what that is, where its used and any other information that could help me get a better idea of whats going on?

Thanks again for your reply. :D
 
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t0il3t

Console Guru
Dec 12, 2003
823
0
DAE.bin is the files that holds the AP2.5 challenge table, the way LT 2.0 works is you decrypt DAE.bin and capture the responses from the disc

After a certain dash update MS started randomizing the DAE.bin for each console rendering the LT 2.0 method useless.

Once the randomized tables came into play LT 3.0 was created utilizing topology data, the topology data takes measurements from the whole disc and is used to provide proper responses to any AP2.5 challenges

DAE.bin is stored on the xbox NAND
 
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deana

Junior Member
Jun 9, 2004
10
0
Right, that makes sense now. Is there anyway to figure out which DAE.bin file my Xbox has and then patch backups with it? Why does the c4eva website make it seem as though flashing with LT+2.0b will let me play successfully?

Or could I spoof my drive to Hitachi pre 59, then AP2.5 wouldn't be supported so it wouldn't look odd to the system that my drive isn't doing any AP2.5 checks?
 
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t0il3t

Console Guru
Dec 12, 2003
823
0
I think getting and decrypting would require either JTAG or RGH.

Spoofing will not work because the xboxs NAND still says 79 so the console will still attempt AP 2.5 challenges

I am not sure but you may be able to change what drive your xbox is looking for by using the RGH, I am not sure if you can create a retail NAND image with changing the type of DVD ROM, but it is worth looking into
 
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