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Originally Posted by Khatiger  I did all 1/2 month ago, but splash screen still blank and vendor stoll showed me -1. I haven't enough time for continue discover. |
Might you have any info that you discovered that you can add to what I enumerated?
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My question is which algorithms of CRC check in VSM file
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Dunno.
BTW, may I ask: are you sure a checksum is used, how do you know this, etc?
I do have a link to a code segment from someone who years ago who hacked the serial communications protocol (i.e. RS-232 data for the RIM 957).
The reason I post this is that 1) it's probably easy for someone to implement this algorithm and see if resource sections (or the whole VSM file) are being checksummed with this algorithm and 2) RIM seems to be rather lazy - by that I mean that in OS 4.1 (IIRC) the little icons on the device (when it was connected to the PC) looked just like the cheesy, pixelated ones on my olde, olde RIM 957 when it was connected to the PC ... which suggests to me that RIM likes to re-use their intellectual property for years and years.
Anyway, here's the link:
http://www.off.net/cassis/protocol-d...ion.html#h-5.0
Maybe someone can do a quick & dirty to see if this is the checksum used by RIM in the VSM files?