Robert Ammerman wrote:

> In the transmitter:
> 
> (1) Send an additional byte at the end of each 'packet' (in response to 
> TXIF)
> (2) One BIT (not byte!) time later disable the transmitter

(and related to other answers - just my opinion).
I'd avoid sending another "byte", i.e. another start bit etc. I 
preferred just keeping the Bus "high" for some bit-time.

I also find sooo "oldish" :) a method, to use an external 555 or other 
switch to recover from TX mode into RX mode...
Having a MCU should allow for easier handling.

-- 
Ciao, Dario
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