Likes: 
Sorry kunix the part about bricking it was meant as a joke .
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31st May 2013, 10:03 PM #1Member +
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31st May 2013, 10:12 PM #2Navigation software Moderator
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I got the joke. And also I said something useful. No problem.
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31st May 2013, 11:45 PM #3Garmin/GPS Systems GMod.
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@kunix
Maybe i've missed something. HWID 0712 (2009-2010 US) sys.bin is just fw_all.bin only, right? If that alone [w/o boot.bin] is supplied on SD by Garmin, as described in the link below, how the dickens does it get loaded? There must be a boot.bin mustn't there? If it's not on the card, is it on the unit's NV somewhere and invoked somehow? Surely if at sometime the boot.bin needed to be updated it would have been written somewhere on an SD update? Maybe these are 'Village Idiot' questions, if so be kind.
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1st June 2013, 08:29 AM #4Navigation software Moderator
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Yes, that sys.bin serves as fw_all.bin, the only difference is that it's loaded by the bootloader from the filesystem.
boot.bin is not bootloader, it's ramloader, and "boot.bin" is a misnomer. It's only needed for writing data from RGN or GCD to the flash chip. And after that it disappears. It's not saved anywhere on the device.
I don't think that map update contains GCD file with boot.bin.
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1st June 2013, 08:38 AM #5Navigation software Moderator
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We can even run a linux kernel as boot.bin in gupdate.gcd. But it won't start transferring regions from the GCD file to the flash chip as normal boot.bin would do.
If only the GCD flashing functionality is implemented in sys.bin... I'm checking that.
UPD: apparently sys.bin can't flash GCD without boot.binLast edited by kunix; 1st June 2013 at 10:29 AM.
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2nd June 2013, 02:36 AM #6Garmin/GPS Systems GMod.
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Yes, i did know that boot.bin is not bootloader ('coz i remember you telling someone [ddabcd277 maybe?] something like this: "OMG, I didn't think anyone understood all that sh*t i wrote about bootloaders and ramloaders .....").
Originally Posted by kunix
Knowing that doesn't mean understanding it unfortunately. 
Can you 'make' a boot.bin to suit? Originally Posted by kunix
Last edited by Neil; 2nd June 2013 at 02:39 AM.
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2nd June 2013, 09:51 AM #7Navigation software Moderator
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No, it's too hard. Originally Posted by Neil
Can you 'make' a boot.bin to suit?
It would be much easier to flash regions 0x11 and 0x13 over USB. Or if USB is not readily available it would still be much easier to add some region flashing code to sys.bin.
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2nd June 2013, 10:00 AM #8GPSPower Helper
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Just as a matter of interest,
Do these devices use oem.xml ?The difference between stupidity and genius is that genius has its limits.
Albert Einstein.
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2nd June 2013, 10:04 AM #9Navigation software Moderator
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No, they don't. They don't even have "XML" string in their firmwares.
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13th June 2013, 08:05 AM #10Member +
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kunix,
I need to fully restore a v.4.50 USA. Do you still have the original dump of my unit?
The flashed Language + V.2.60 has been tested during a trip of 2200 Km without problems, but when running the map without a route the navi freeze.
For me this is not a real problem but "obviously" someone doesn't want this "imperfection" ad want to roll back to the original.
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