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Cowon d2 simulator shows 10 "filters" high shelf, low shelf and 8 peak filters.

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Bilgus:
https://github.com/Rockbox/rockbox/blob/master/firmware/drivers/fat.c#L367

Edit:
So looking through the source for error -1 I don't see it returned in the sd write function
https://github.com/Rockbox/rockbox/blob/master/firmware/target/arm/tcc780x/sd-tcc780x.c#L503

I only see it in the NAND function which AFAICT is not used on the D2 you run everything from the sd card

Going back looking for the error I find it here:
https://github.com/Rockbox/rockbox/blob/d64ff86fb6be22875cfae054f8a878dbd8b1472b/firmware/storage.c#L417

What this implies is that the function storage_write_sectors() is not working properly
if you are editing and re compliling yourself try rewriting the storage_write_sectors functions like so..

--- Code: ---int storage_write_sectors(IF_MD(int drive,) unsigned long start, int count,
                          const void* buf)
{
#ifdef CONFIG_STORAGE_MULTI
    int driver=(storage_drivers[drive] & DRIVER_MASK)>>DRIVER_OFFSET;
    int ldrive=(storage_drivers[drive] & DRIVE_MASK)>>DRIVE_OFFSET;

    return sd_write_sectors(IF_MD(ldrive,)start,count,buf);

    //return -1;
#else /* CONFIG_STORAGE_MULTI */
    return STORAGE_FUNCTION(write_sectors)(IF_MD(drive,)start,count,buf);
#endif /* CONFIG_STORAGE_MULTI */
}

--- End code ---

parametrics:
http://forums.rockbox.org/index.php?topic=10164.945
theres info on the the "panic." Its from 2015  is it solved yet????

I tried the 2018 and 2019 RBversion ( the one thatsextracted on SD) on my cowon d2+ with version 2.13

been playing for years with 2012 RB version 2.13 with 128GB all FLAC. No problem, just a very occasianal screen freese once in a week.Quick restart and all ok again. Thats no issue.

Should i try and install 3.13 first? i am very curious why there is so very little info on the problem. When was the 10 band EQ first introduced? would like to try early version.lets say 2013,2014 Can anyone link me to such a version

Cheers

Bilgus:
see above.. I'm pretty sure its an issue of CONFIG_STORAGE_MULTI being defined for the D2
but it isn't actually implemented completely
I can look into it later on in the meantime if the above works for you let me know

parametrics:
sorry Bilgus, just now see your reply (was on page two) i look into it   never done recompiling!!
i would not know where to start!!  How much work would it be for someone used to this stuff

"What this implies is that the function storage_write_sectors() is not working properly
if you are editing and re compliling yourself try rewriting the storage_write_sectors functions like so.."

Bilgus:
I can compile you some test builds this week.

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