Jose R. Valverde wrote:
>> In article <5gpe92$c4c at acebo.sdi.uam.es>,
>> Wait a second! The ones that keep cksum do
>> finish in the last column! So that may be it, that last ~ Peter was
>> mentioning a while back? Hum...
The checksum is calculated as follows :
Checksum = (Sum for each pos of ((pos%57) * ASC(res[pos]))) % 10000
where pos is position in sequence, and res[pos] is the residue
at position pos (including gaps) and ASC(res[pos]) its ASCII
Since the ASCII value is 46 for '.' and 126 for '~' it's no
wonder why sequences having gaps at the end do not have the
same checksum in GCG 9 (end-gaps '~') as in GCG 8 (end-gaps '.').
GCG 9 checksums are just perfectly normal.