On Mon, 5 Jul 1999 09:23:39 +1000, you wrote:

>Dave VanHorn wrote:
>
>> I've done this on an 84, with ints AT the bitrate.
>> The trick is to catch the edge of the start bit, and sync the ints up
>> half a bit-time late.
>
>  Yes, but that's the hybrid technique; you still need to poll for the
>start bit and synchronize the interrupts.  Only *thereafter* it has low
>overhead.
Not necessarily - you can either sample at 2x baud rate, or generate
an edge interrupt on the startbit.