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  1. #11
    Important User Garmin firmware Understanding
    Garmin firmware Understanding
    haute's Avatar
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    I'm guessing that can be stored in the IC K5n5629ATA (NOR Flash) 256Mb.
    In theory it should be the NV ram. It is not logical that the region 0xC (boot.bin).
    I guess until you get to read the eMMC Ic not really know this.

    Already Garmin's engineers are not going to go through here, but in this forum there are people with much knowledge. hehe

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  3. #12
    Important User Garmin firmware Understanding
    Garmin firmware Understanding
    haute's Avatar
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    Quote Originally Posted by kunix View Post
    Most probably you can discuss this stuff only with very few Garmin engineers. They don't visit noeman I guess

    UDP: on both devices fw_all.bin is executed directly from flash (as its base address differs from boot.bin's one). As far as I know only NOR flash can be mapped to processor's address space directly (and NAND flash cannot).
    Therefore, device 0 is NOR flash.
    Device 5 is NAND flash, I guess.
    Device 2 has region 12 which is mapped to RAM. So I guess device 2 consists entirely of RAM-mapped virtual regions.
    Device 3 consists if virtual regions, which can be mapped to files.
    Therefore, it looks like SD/MMC card doesn't have a region, which can be read with HWM_read_rgn. And that's logical, as those cards can be huge, but HWM_read_rgn can only read first 4GB (it has 32-bit parameters).
    A Garmin engineer could not explain better.
    I hope someday to thank all this help.

    A greeting

 

 
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