23 Sep
2014
23 Sep
'14
12:10 p.m.
On Tue, 23 Sep 2014, Patrik D'haeseleer wrote:
On Tue, Sep 23, 2014 at 11:43 AM, Jake
<jake(a)spaz.org> wrote:
disk: \x02\x13\x00LST0001123.JBI \x00\xfc
disk: \x02\x13\x00LST0001124.JBI \xff\xfb
yasnac: \x02\x0f\x00FRD123.JBI \xdc\xfc
yasnac: \x02\x0f\x00FRD124.JBI \xdb\xfc
perhaps it's a 16-bit checksum?
Yeah, looks like some sort of 16-bit checksum, with the first hex code being the lowest
byte. If you read them this way, you see they're exactly 1 bit
different:
\x00\xfc -> #FC00
\xff\xfb -> #FBFF
\xdc\xfc -> #FCDC
\xdb\xfc -> #FCDB
I'd say try again with 113 or 133 in the filename, instead of 123 - need a bit more
evidence.
write a test in python to see if you're right! i will gather more
evidence tonight though.
-jake