Hi,
if you don't really know where to start check this:

http://www.hth.com/snap/

I think this would meet your criteria perfectly, if not
is a very good starting point for building your own.
I.e. dest and source adress, variable payload, optional checksum etc.

/Tony




Tony K=FCbek, Flintab AB            =

=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=
=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=
=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2
E-mail: tony.kubek@flintab.com
=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=
=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2=
=B2=B2=B2=B2=B2=B2=B2=B2=B2=B2

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu