>;================================================
>;        Send byte to PC
>;================================================
>
>         bank0
>         movlw   databyte          ;put data into
>transmit buffer
>         movwf   txreg
>
>;wait here to test for byte gone
>
>         bank1
>         btfss   txsta,trmt   ;byte transmission
>complete
>         goto    $-1
>         bank0

   This reminds me of a question I've been meaning
to ask.  Some UART code I've seen checks TRMT=1,
other code checks TXIF=1, and some code checks both
flags.  Is there a reason why just checking TXIF=1
to verify that TXREG is empty is not sufficient?
Under what circumstances would you need to know that
that the TSR itself is empty before sending another
character?


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