BS> Then you are finish with the serial io module, 
 BS> would it then be a big problem to write a VMODEM 
 BS> program?
 
Yup, that would be an *enormous* pain in the rear. Probably a couple of
weeks' time, I'm not doing it. :)  You need to either write a STREAMS
module, or a pseudo-tty-using-program which will remove/recreate its own
block-character device (for multiple connections bound to the
"same" serial port").
 
Why in God's name would you want to do that??
 
Wes

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