Nav system update - Page 3

krullshards · 19th August 2002, 23:43

I used Nero as was suggested elsewhere. It might have something "extra" in the iso image and you may NEED to use Nero. You can get that from www.ahead.com.

Digi · 20th August 2002, 00:16

Lasseoe, you probably just copied the files onto the CD, or you are using a CD-RW instead of CD-R media. Use a CD-R media, and use the "create the CD from an image file" option. The .nrg or .iso image file has formatting and other properties and hidden files that must be properly reconstructed. It is a copy (image) of the orginal CD that was copied. The files will be extracted into the exact same place on the new CD when you create the new image from the file This is why just copying these files to the CD-R will create an unusable CD.

JFB · 20th August 2002, 00:50

X5Boston posted this helpful Tutorial Thread on using Nero to burn an image. I found that the process did not work well on Nero's default settings. You have to make sure that the application is set up as explained in the tutorial. I also found it worked when I burned the image with the slowest setting, but not necessarily at the faster settings.

See also this BMW Nav Software FAQs Page

I apologize for being unable to e-mail the file. It seems to be too large for the e-mail servers.

raland9 · 20th August 2002, 05:50

While you guys are doing what BMW engineers or NAV engineers don't seem to be able to do properly, it would be great if some of the flaws could be eliminated. Also, in the split image, it would be great to also show the FM station, CD track, etc. and not the longitude and latitude. I have a bunch of other issues and wish that I had the expertise some of you had. I would have made some improvements.

Rick

xilly · 20th August 2002, 11:47

Hello,

what is the size of the new version ?

I wonder if anybody can send me the new version by email ?

Sincerely

william

lasseoe · 20th August 2002, 12:04

Digi,

I burned the ISO like I've burned lots of other ISOs using cdrecord, never had any problems... I do know what I am doing :-)
Anyway, I'll try Nero on Windows to see if that helps.

Thanks.

- Lasse

Quote:

Originally posted by Digi
Lasseoe, you probably just copied the files onto the CD, or you are using a CD-RW instead of CD-R media. Use a CD-R media, and use the "create the CD from an image file" option. The .nrg or .iso image file has formatting and other properties and hidden files that must be properly reconstructed. It is a copy (image) of the orginal CD that was copied. The files will be extracted into the exact same place on the new CD when you create the new image from the file This is why just copying these files to the CD-R will create an unusable CD.

Digi · 20th August 2002, 14:00

Quote:

Originally posted by xilly
Hello,

what is the size of the new version ?

I wonder if anybody can send me the new version by email ?

Sincerely

william

The image is just under 200MB, as I recall. Not easily mailed.

sysvr4 · 20th August 2002, 14:29

raland9 brings up an interesting point, and one I think needs addressing sooner rather than later...

I agree that changing things such as those you mentioned would be a nice touch. The unfortunate truth is that reversing code is somewhat limited in what you can change. You see, we'll have to affect changes in the opcodes of the executable such that:

a) the executable remains exactly the same size
b) the order of the execution doesn't change (dramatically)

So essentially, taking out the Accept should be possible because it'll amount to only *removing* a particular loop or condition using noops (no operation opcodes). This meets both of the criteria above.

The addition of features is virtually impossible without the source code because of those criteria, and because programming straight opcodes just isn't human :-) So I just don't think things such as those will be possible...good thought though :-)

In fact, there is still one thing that worries me about this process. I've heard reference to a 'key' that pairs with the update CDs. That may not be a program, but if for some reason this key is tied to (for example) an md5 checksum of the binaries on the update CD, it'll bag out the install if it notes we changed a binary. But there's nothing we can do about that if it's there, so I'm willing to give it a shot in case it isn't... (cross your fingers)

Jeff

Digi · 20th August 2002, 15:11

I think the key CD is just a "license" CD, and doesn't involve any encryption or checksum features. I think this is true because you can upgrade without it unless going from version 17 to 18 or 19. Key CDs as you describe would be needed for ANY upgrade or installation.

sysvr4 · 20th August 2002, 16:24

Digi,

I think you're right. I know that for the later versions on MK III systems you don't even need the key CD. But that made me think that perhaps they placed a private key into the hardware and integrated a corresponding key into the update itself based on the software as an integrity check. 90% unlikely, but hey, I'm paranoid :-) Like I said, if it's there, we can't do anything about it anyway, so there's no use worrying, but I, like you, sorta doubt it....

Jeff