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Author Topic: To Jtag Or Not To Jtag  (Read 98 times)

fantom_kode

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« Reply #15 on: January 24, 2010, 12:49:00 AM »
If you can't use LPT, why not shell out the $$$ for a cygnos and do it via usb? I know the cygnos doesn't seem too popular "'round these parts", but if you have no other option, why not? Unless you have the 256 or 512MB Jasper, of course.
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AlexBoiler

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« Reply #16 on: January 24, 2010, 01:07:00 AM »
QUOTE(bmcclint @ Jan 24 2010, 12:13 AM) View Post

Linux server runs the house so offline can be a problem...


Runs the house?  Do you live in the future?  blink.gif
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bmcclint

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« Reply #17 on: January 29, 2010, 08:10:00 PM »
OK...Well surgery is complete and its still alive.  Now I need to wait for a PC with an LPT port to test out.

Sorry...I forgot to take pictures until I was almost done.  Wire inside is about 6" long.  External is about 27" so I hope its not too long.  Anyway...resistors are in the db25 boot along with the dioide on pin 11.  According to the ohm meter everything looks good and had good ohms.  I was very maticulous so we'll see...

IPB Image

Any yes...server runs the house, not in the future and long story...
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bmcclint

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« Reply #18 on: January 31, 2010, 12:15:00 AM »
Well...got a hold of an older laptop with an LPT port.  Got XBR Flasher but edited line for writing...  Ran and got the following error.  Thoughts?

IPB Image

There is nothing read so it seems like there is something else going on?  Soldering?  Diodes?  Resistors?  Wrong wiring?
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bmcclint

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« Reply #19 on: January 31, 2010, 01:00:00 AM »
Solved...needed .NET framework.  You think it would say 'need .NET framework'...duh...

Dumping...
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bmcclint

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« Reply #20 on: January 31, 2010, 02:40:00 AM »
Two good dumps and xbr.bin ready to go.  Stopped at flashing as I would like to understand more before writing.  Anyone have a good place to read about what to expect?  Will a normal dash boot up?  Will I see the blue screen with CPU key?  What to do next?

Also...last line in bat file to write is...

nandpro\nandpro.exe %usblpt%: -w256 xbr.bin

...should it be -w256 or -w16?

Overall process has progressed well and I am looking forward to whats next...

Advice?  Thoughts?
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omega232

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« Reply #21 on: January 31, 2010, 06:03:00 AM »
You'll boot it up to see the NXE dash. XeLL won't load unless you start the console by hitting the dvd eject button.
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xc1234

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« Reply #22 on: January 31, 2010, 06:46:00 AM »
nandpro\nandpro.exe %usblpt%: -w256 xbr.bin

I think the 256 and 16 refer to the type/size of nand that is on ur xbox mainboard.  how big is your nand dump, make that the number in your "w" command.
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GTRagnarok

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« Reply #23 on: January 31, 2010, 11:17:00 PM »
Can anyone clarify something for me? I've been doing some research before I do my own JTAG (I just won a new, sealed May 2009 Xbox 360 arcade - should be exploitable). So after everything's done, you have to manually update the Xbox 360 yourself? Say, if you update it like normal through a game disc or Xbox Live, it would screw everything up?

Also, I've read that with the Arcades 256/512 it can take many, many hours to read using an LPT nand reader and that USB is an alternative. How viable is the USB option? Is it harder/more risky in any way?
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Haruno

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« Reply #24 on: January 31, 2010, 11:43:00 PM »
QUOTE(GTRagnarok @ Feb 1 2010, 07:17 AM) View Post

Can anyone clarify something for me? I've been doing some research before I do my own JTAG (I just won a new, sealed May 2009 Xbox 360 arcade - should be exploitable). So after everything's done, you have to manually update the Xbox 360 yourself? Say, if you update it like normal through a game disc or Xbox Live, it would screw everything up?

Also, I've read that with the Arcades 256/512 it can take many, many hours to read using an LPT nand reader and that USB is an alternative. How viable is the USB option? Is it harder/more risky in any way?


Generally you wont be worrying about updates at all because you can remove system updates from games and play them off the hdd/usb.
In the event of which you would HAVE to upgrade, you would remove the resistor that burns efuses so that updates dont break jtag-ability. I don't think you would WANT to upgrade, ever, because that would essentially remove XBR. The best thing to do in such an event would be to wait for a newer XBR that has the update.

USB is a bit more difficult but if you're good with that kind of stuff, it's a good way to go.
LPT is fine but slow but you do NOT need to dump/write all 256/512mb.
You can write xell to the nand and use that to dump it over ethernet (MUCH faster)

http://docs.google.c...fmv5h_0hbhwdzfv
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GTRagnarok

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« Reply #25 on: January 31, 2010, 11:57:00 PM »
Ah, OK. Makes sense. I remember deleting update files from games on the original Xbox too. Thanks for the help and the link too.
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GTRagnarok

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« Reply #26 on: February 02, 2010, 01:25:00 AM »
Another thing. I'm getting conflicting accounts of where to solder the diodes, either on the J2D2 points or on the other end. Does it matter?
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GTRagnarok

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« Reply #27 on: February 03, 2010, 11:14:00 PM »
QUOTE(AZImmortal @ Feb 2 2010, 08:12 AM) View Post

The side of the diode with the black ring (direction matters) should be soldered directly to the motherboard.


Yeah, but this guide:

http://forums.xbox-s...howtopic=701315

says to not do that but this instead:

http://i12.photobuck...7/jtagwires.jpg




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AZImmortal

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« Reply #28 on: February 04, 2010, 07:17:00 AM »
Distance between the diode and the motherboard on the black ring side seems to matter for some people.  If connecting the diodes that way works for you, then that's fine, but there have been a few people who weren't able to get the hack working unless the diodes were connected the way that I said.  However, for DB1F1, you should probably solder a short, thin wire directly to DB1F1 and then the diode to the wire.
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