>         I once read on the list that the internal osc won't vary more
> then 3%.  I've communicated with modems using the intrc and never seen a
> problem.  However I use my own code and not the usart.
>
> It would depend on what you are trying to communicate with and how picky
> it was. i.e. a 57.6K modem would most likely have problems but a 2400
> would work with no problems.

This makes no sense because it is the percentage error that counts.  3%
clock error should work if the other end has very little error, but is
uncofortably close to the margin.  This is true at 300baud or 57.6Kbaud.


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