You could have tried www.google.com ......
After 1 minute of searching (Ok, I knew that this document existed which
makes it easier):
http://pauillac.inria.fr/~doligez/zmodem/ymodem.txt
Don't be put off by the title, it explains both x,y and z modem and contains
the original x-m spec
Wouter

> I'm attempting to write some datalogging code using the Xmodem protocol.
> Unfortunately, i've not been too successful in finding good info on the
> protocol. can anyone point in the right direction?

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