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#21
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The most simple would be XOR but there is also CRC etc. I guess without further inside info we are screwed or can just try. My program replaces the images very exactly. So if someone can exchange the image with a smaller one (filesize) and it works, then we know that there is no checksum. With bigger file is always the risk to "disturb" the bytes of the next file. |
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#22
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#23
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@DaRkY
Which bytes did you change? Did you check if the image was still valid? Paint opened it but that doesn't anything since it might repair the file. Best way would be to replace it with a smaller valid file. I uploaded an altered navboot here: www.carmes.de/download/software/navboot Maybe someone can try that. Tino Last edited by 2Wires; 02-18-2006 at 03:28 PM. |
#24
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#25
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If we know where the checksum is and how it is calculated. We just calculate it for the altered navboot.
But that need more inside information or luck finding it |
#26
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I have the same issue, how did you solve it? thanks
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#27
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Why dont we extract the original BMW image used on the MK IV navs and see if that works... and then go from there
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#28
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#29
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XOR is very easy and just used for smaller codes like the IBus/KBus communication. |
#30
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Paul- I along with everyone else here applaud your efforts and your methods!
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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