> Agreed, however sometimes one needs every single cycle.
> Let's say that the pulses actually are shorther than possible to
> s/w decode on the fly, then it might do the trick to use the isr
> flag as a 'bit-buffer'

Yeah, that's an option - rotate the bits through a buffer and worry
about it later. Sooner or later though high baud rates will mean
moving to a faster/bigger micro or some external h/w

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