Is there any way to clear only the SBUF register before serial i/o is initiated ( similar to
flush(port ) in C ) , so that I can debug more precisely, the cause of the problem ?
No, debug on RI. Till RI SBUF is invalid.

<i?2) I have a problem the when I am using a 9600 baud rate , sometimes the characters are geting dropped . There is no problem when i reduce the baud rate to 2400
a) is the serial comm interrupt driven?
b) MAX232 equivalent or funny circuit that "works"?


Erik