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#51
02-18-2006, 11:32 PM
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I think the loader.ini may actually have the CRC checksum, as I found this in dec location 1508209. To set %s to %s with file checking on %s path, type bootmon -ax %s After reading this we might be able to just turn the checksum OFF |
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#53
02-19-2006, 02:12 AM
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I think y'all should put the dilithium crystals in the pseudoscillogism and excommunicate the redundancies in the biosphere as supercalifragilisticexpealadociously as y'all can.
Keep up the good work, everybody. I can barely type, so I'll just stay off to the side here and cheer. JV
__________________
JV What gets us into trouble is not what we don't know...it's what we know for sure that just ain't so |
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#54
02-19-2006, 02:23 AM
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Quote:
__________________
TQ2K '04 N62 - Alpine White/Truffle '03 S62 - Petrol Mica/Champagne '97 S52/4/5 - Alpine White/Dove '91 M42/4/5 - Brilliantrot/Tan |
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#55
02-19-2006, 02:47 AM
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Okay, so I modified the original V26.09a navboot file so that it has the OEM splash logo. I made sure that the original file and the new file were identical. Next, using my hex editor I did a "CRC16/32 of file/block" calculation on the original and modified files and surprisingly they return identical values.
Next step is to slow burn the image using DVD Decrypter (preference thing, I hate Alcohol120%) I'll save that for tomorrow, kinda tired  Keep my fingers crossed. Not quite there yet folks, you gotta hand it to the X5World braintrust 
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#56
02-19-2006, 03:29 AM
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Quote:
Tried the following with no luck (same error) - changed 2 bytes (2 characters) in the middle of the GIF logo file embedded in NAVBOOT - ie. same filesize - ensured that the NAVBOOT datestamp was exactly the same (to the second) The good news is that when it fails, all you have to do is put the 'official' CD of v26.09A into the Navigation Computer and it installs & functions properly. This saves having to go back to v26 and then do the 'update'. If we do find out how to get it to work I would think that we could have virtually any splash screen we like. Clearly file size is not the issue as this 'T 26.09A' image is much smaller than the '==BMW==' image (and the colour table is different too). Paul Martin Australia www.paulnika.com |
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#57
02-19-2006, 03:46 AM
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this suspense is INTENSE!
__________________
2008 E82 135is JB2 Alpine White / Lemon 2008 E90 335i JB2 Monaco Blue/Grey 2007 E85 M Roadster Black/Black 2006 E60 550 w/ M Kit Silver/Black 2003 E46 M3 SMG w/ VMR V715 19's Blue/Black 
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#58
02-19-2006, 08:05 AM
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Hope this helps........
I have been analyzing the files. All the data files (programmes), appear to be derived from C or C++. So I dont think we can simply recode to avoid the checksum...that would be bad! Anyhow ALL the files end 00xx xx xx. ie the last 3 bytes of the file apper to be the check sum. This represent not a 16 bit or 32 bit checksum but a 24 bit checksum! Having a wander around the web I did find a reference to the fact that OS-9 does use 24 bit CRC checking. Therefore to me me it looks like the navboot files checksum is the last 3 bytes of the file itself..... now all I have to do is to find a 24bit CRC calculator! Good huntin' |
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#59
02-19-2006, 09:22 AM
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Altered 'navboot' with corrected CRC-24 uploaded to:
http://rapidshare.de/files/13622411/navboot.rar.html Need to test it. |
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#60
02-19-2006, 09:55 AM
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Is anyone knows a type of processor, used in MK4? I think, it's some kind of MIPS processor. I found a page with a variety of MIPS emulators and debuggers here http://www.linux-mips.org/wiki/Emulators Maybe it can help us?
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