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Author Topic: Writing Bios Directly To Ram  (Read 29 times)

heinrich

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Writing Bios Directly To Ram
« on: November 11, 2004, 02:29:00 PM »
PBL and variants can load a bios into ram.
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BCfosheezy

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Writing Bios Directly To Ram
« Reply #1 on: November 12, 2004, 11:36:00 AM »
QUOTE (FreakInvasion @ Nov 11 2004, 01:28 PM)
When the xbox loads, it writes the image from the bios chip to its RAM. Whenever it signs onto xbox live, it hashes this image from ram and lets MS know whether the bios in memory is MS's or a hacked bios. What if one where to read the RAM and find the location in the memory that the bios image is written and after the xbox is loaded, the new bios (most likely the original MS bios) is written to the RAM. That way, when the xbox tries to log onto live, the xbox will hash the legal bios in memory, and the xbox running the modchip will not be banned.

Sound feasible?

I don't think this is as easy as you make it sound. The bios is not just "written" to ram. It is decompressed and decrypted. So it extracts it to ram. That would not make your idea bad though since that would change nothing. The problem is that the xbox puts the extracted image in this location and then reads from it when it needs. If you let your hacked bios load and then overwrite it with a retail bios then you've just unmodded your xbox. You would have to figure out exactly what live checks for and make sure that you meet all of it's parameters and put a hook so that the xbox reads the hacked bios instead of reading from the rewritten retail bios. I don't know exactly how M$ checks but my guess is it's not this simple. Also, this task we're talking about is not very simple. It would take quite a lot of hard work and it might not even be possible.

I forgot to add. Nobody wants to hack live. It's the one place xbox gamers can go to have a pure gaming experience where sheer skill gives them an advantage over others. If you want to cheat or use pirated games then simply don't use live. Get on XBConnect and fire up your glasshacks and play some original Halo. I think the majority of us like live pure. Put your mind to more productive things than trying to hack live. Also let's say you did change memory locations and got this to work. How hard do you think it would be for m$ to fix that?
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