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  #81  
Old 02-19-2006, 01:22 PM
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Tino, I believe @RichardP1 is right. There maybe multiple checksums. This V26.09a is indeed a completely different animal compared to the other versions.

I working on a solution and will post back.

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  #82  
Old 02-19-2006, 01:28 PM
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If there are multiple checksums, these are likely to be at logical page boundries, multiples of 4K or 8K or 16K etc.
  #83  
Old 02-19-2006, 02:05 PM
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I think the approach should be to use the v26 code and figure out how to change the options.

There are a lot of options in the code such as OFF Road, Taxi Route, car rental mode, ect.

I have made new installation disks with the V26 code in the following configurations.

None of them loaded the perspective mode

All V26 files, loader.ini from V26.09

All V26 files, bsw2 from v26.09

All v26 files, lowboot from v26.09

All V26 files, navboot from v26.09 This one was odd, as the software said loading 00, then I stil had the v26 ==bmw== logo and 6.0 on the settings menu and no perspecive mode

This makes me think that the navboot file is only loaded if "needed"

I have gone thru the tioarch.tar files and they seem identical

I think the smart option would be to find the switch to turn on perspective mode
  #84  
Old 02-19-2006, 02:13 PM
TJJ TJJ is offline
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Quote:
Originally Posted by ambishop
I have gone thru the tioarch.tar files and they seem identical
They are not identical. You have not yet tried this? http://www.xoutpost.com/102274-post76.html
  #85  
Old 02-19-2006, 02:16 PM
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Quote:
Originally Posted by ambishop
I think the smart option would be to find the switch to turn on perspective mode

This is worth exploring...however there may not be a switch to turn it on, so we could be going down a dead end.


I have been investigating the possibility of multiple CRC checks in the file and I have found evidence for it.

Each section starts :

4DAD 0002 XXXX XXXX.

If you go into the file by XXXX XXXX you find another section beginnig 4DAD 0002 YYYY YYYY.

yet again go into the file by a further YYYY YYYY and you find another 4DAD 002.....and so on.

I guess we need to work out where the header ends and the CRC starts within each section and see if we can replicate the CRC numbers.

This is like a giant game of Sudoko .....but far more fun!
  #86  
Old 02-19-2006, 02:22 PM
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Just tried and no go either.
I have made a stack of coasters, and my CD spindle is almost out
I think this is the right approach, but just not sure how to turn Perspective on with the V26.00 Software disk

Martin

Last edited by ambishop; 02-19-2006 at 02:34 PM.
  #87  
Old 02-19-2006, 02:37 PM
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Yep, definitely multiple checksums for each block within navboot. Need access to OS9 development suite. Microware has an eval copy which they will snail mail. I'm gonna give it a try.

I wish they had a download for it.
  #88  
Old 02-19-2006, 02:37 PM
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It looks like Nomads changing of the checksum works. We just need to find out how he changed it.

I am ok sticking with the V26.09 software, but would prefer to just learn how to turn on the code for Perspective mode with the v26.00 software load. This way you will know how to "turn it back on" with the next software release.

Quote:
Originally Posted by nomad
Altered 'navboot' with corrected CRC-24 uploaded to:
http://rapidshare.de/files/13622411/navboot.rar.html

Need to test it.
  #89  
Old 02-19-2006, 02:39 PM
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Tyre has a copy of the eval software. maybe he can FTP it to you smart guys

Quote:
Originally Posted by tdaniely
Since it seems I was the one that originally started this craze, it's only fair that I answer.

Here are a few notes, speaking from personal trials (yes, I was brave enough to try on my OWN nav computer)

1) No, you cannot "permanently" screw up your nav computer with a corrupt image. If you screw up the checksum with an invalid GIF89a image, the disc will either NOT boot, or will boot and hang during the middle of the install

2) Dont panic, turn the car off. If you have a video module, when you turn the car back on, you'll have a very rudimentary main menu. Eject the disc from the nav computer, and insert a FRESH copy of v26. Give it a few MINUTES (not seconds). It will eventually boot and load the fresh copy of v26 back onto the computer. Then you're free to go back into the house and continue hacking the OS LOL

DISCLAIMER: Just because I've flashed mine about a ZILLION times and not killed it, doesn't mean you'll do the same LOL

Now, for the other news.

I have NOT changed the logo, but I have been able to successfully REMOVE it from the code.

There is indeed a checksum, however, we need a Microware OS-9000 guru to figure out that portion.

I have a copy of IDA PRO if anyone needs it (with the OS-9000 plugin)
  #90  
Old 02-19-2006, 02:42 PM
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Quote:
Originally Posted by ambishop
I think the approach should be to use the v26 code and figure out how to change the options.

There are a lot of options in the code such as OFF Road, Taxi Route, car rental mode, ect.

I have made new installation disks with the V26 code in the following configurations.

None of them loaded the perspective mode

All V26 files, loader.ini from V26.09

All V26 files, bsw2 from v26.09

All v26 files, lowboot from v26.09

All V26 files, navboot from v26.09 This one was odd, as the software said loading 00, then I stil had the v26 ==bmw== logo and 6.0 on the settings menu and no perspecive mode

This makes me think that the navboot file is only loaded if "needed"

I have gone thru the tioarch.tar files and they seem identical

I think the smart option would be to find the switch to turn on perspective mode
I am chasing this approach also and will fwd updates...

Also I have switched to CD-RWs as my spindle was growing low from making coasters... the DVD drive reads them with no problem, but it adds 5 minutes for erasing and ~8 mins for the write. Upside: Have used the same disc for the last five burns.
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