I'm going to take back this comment: " I myself have passed characters between two m100 at 76800 by manually coding, but It was flakey because of how you have to set up the UART."
For some reason I thought I recalled that the UART stopped using 16x clock for RX sampling at 76800. Wrong! It always uses 16x clock. So the UART should not have any problem with 76800. So, when used with an RS232 system that can support 76800 that's the best option. >
