Topic: Disassembler For This Ibm Cpu ? (Read 658 times)

TheSpecialist · « **on:** November 23, 2005, 09:27:00 PM »

Here you can download the emulator XEX file:
http://assets.xbox.com/en-us/backwardcompa...ity/default.zip

I'd like to disassemble some instructions from this file, but I don't know which software to use. Does anyone know of some software to use ? Something that at least can translate bytes to opcodes for this type of CPU would be nice (some HIEW-like software for example).

This post has been edited by TheSpecialist: Nov 24 2005, 05:28 AM

superjedi · « **Reply #1 on:** November 24, 2005, 05:51:00 AM »

objdump compiled with multiarch or IDA (Interactive Disassembler).

kris5487 · « **Reply #2 on:** November 24, 2005, 10:16:00 AM »

Link isnt pointing to the correct url, it can be

Found Here

atomiX · « **Reply #3 on:** November 28, 2005, 07:48:00 AM »

The update executable (default.xex) is encrypted. You won't be able to disassemble it unless you can decrypt it. Look at it with a hex editor and you will see what I mean.

Pow_ · « **Reply #4 on:** November 29, 2005, 09:42:00 PM »

QUOTE(atomiX @ Nov 28 2005, 06:48 AM)

The update executable (default.xex) is encrypted.

Or compressed.

InterestedHacker · « **Reply #5 on:** November 30, 2005, 04:23:00 AM »

QUOTE(Pow_ @ Nov 30 2005, 06:49 AM)

Or compressed.

Or both

deadparrot · « **Reply #6 on:** November 30, 2005, 10:03:00 AM »

The guys over at Free60 believe it to be a modified .CAB archive, much like the .XCP.

MGSolidus2 · « **Reply #7 on:** December 04, 2005, 10:59:00 AM »

Tried to dissasemble it with IDA, came up as binary. I looked at it with a hex editor, it's definitely encrypted. I don't know about compressed though.

holydemon · « **Reply #8 on:** December 05, 2005, 09:17:00 AM »

i can probabaly take it through a debugger i made and decompress it and decrypt it but it would take a while

TheSpecialist · « **Reply #9 on:** December 07, 2005, 05:31:00 PM »

QUOTE(holydemon @ Dec 5 2005, 05:17 PM)

i can probabaly take it through a debugger i made and decompress it and decrypt it but it would take a while

And how would you decrypt it ? There's nothing known yet about the encryption technique.

maddy2005 · « **Reply #10 on:** December 08, 2005, 03:08:00 AM »

holydemon im HIGHLY impressed if you can!!!!!!!!!!!!!!!!!!!!!!!

TheSpecialist · « **Reply #11 on:** December 08, 2005, 07:57:00 AM »

QUOTE(maddy2005 @ Dec 8 2005, 11:15 AM)

holydemon im HIGHLY impressed if you can!!!!!!!!!!!!!!!!!!!!!!!

Forget it, nobody can at the moment, there's just not enough info yet.

Darren101 · « **Reply #12 on:** December 10, 2005, 05:41:00 AM »

One way to decrypt it.

Trial and error

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