189w ago - Developers at DemonHades have located and mapped the JTag Port on a PS3 Blu-ray drive board today.
To quote, roughly translated: I found the JTag port for the Blu-ray Reader on the PlayStation 3. Last night after finishing the research meeting I went looking for information about BD integrated reader.
In and looking at the information that I found on the back of the plate reader I saw that there is no connector terminals, these terminals belong to a connector which connects 'something' via terminals and through the Internet I found the points used in a JTag, including the TDO, TDI, TMS etc.
Originally developed for printed circuit boards, it is currently used for test of submodules of integrated circuits, and is also useful as a mechanism for debugging embedded applications, as it provides a backdoor to within the system.
When used as a debugging tool, an in-circuit emulator that uses JTag as the transport mechanism allows the programmer to access the debugging module that is integrated into the CPU. The debug module enables the programmer to correct their errors and code logic of their systems.
There are consumer products that have a JTag port integrated, so that the connections are often available on the PCB as part of the prototype phase of the product. These connections can provide a simple way to reverse-engineer.
As you can see we have a door strike to try to get the firmware, decrypted data, and all that is able to control the Blu-ray reader.
The data from this integrated JTag will CXD5063GG-1. CXD5063GG-1 = ASIC / CPU - Video Decryption Device Sony Computer Entertainment Inc., CXD5063GG-1, 2005 SCEI, 120,748 0608HAL.
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jtag ports are access ports to very sensitive data, like the firmware for example. Jtag ports can sometimes read and write that firmware meaning you could actually pull out the firmware of the bluray drive and then reverse engineer and flash a modified firmware capable of running lets say backups?
This is just an idea of what a jtag port could accomplish and dont take my post very serious since im a newbie in the ps3 hacking scene. But jtag ports have been used to do a lot of stuff in a lot of other places and a lot of hardware has been hacked due to jtag ports.
Well, a few reasons - it's not the best to say that you've come across sensitive information - best to keep that kind of quiet.
Furthermore, it makes it a bit easier to purchase hardware when the demand isn't as high to experiment on - after all, this kind of stuff costs a bit of money, the cheaper we can get it - the better!
Just for the record, there is no PS3 hack - trust me, when that happens, I'll scream it from the rooftops. Sure, there is some information (mostly eventually useless, like the fact that the JTAG is disabled) that we have not made public yet, but with good reason. I do and will post on it once we have played with it as much as we can - otherwise, we would just be blowing a possible way in.
I'm not a fan of being a bit on the quiet side, but sometimes its a necessary evil, in order to advance development!
Basically the PS3 Devs here have agreed not to share things like that publically... since it came from the PS3 Service Manual Sony is really the source.
As CJPC mentioned above though, it's of no use so by them making it public now Sony knows there is a Service Manual leak which will only make it more difficult for us to get those for the CECHL0x and the CECH200x.