Re: [Bitpim-devel] VX4500 on Mac problem

[Peter D. <du...@hd...>]

On May 4, 2004, at 4:32 PM, Roger Binns wrote:

> For the 4400/6000 the field named unknown20c is beyond the end
> of the entrysize.  On the 4400 it is always a sequence of 5 nulls.
> For the 6000 it is a 5 nulls followed by a two byte number.
> The 4500 seems to be doing the same as the 6000.  If you can
> figure out what those last two bytes are I would be very
> interested.
>

Maybe this is just numerology, but:

unknown20c is at position 9 in the block, and if you add that position 
with the value (0x222 = 546 decimal) you wind up with 555, which is the 
position of the sequence of 5 nulls.

Those final two bytes have the value 0x231 (561), which happens to be 
its position in the block.

Maybe this is used internally as some method of skipping over things or 
checking integrity.

Peter Dufault
HD Associates, Inc.