Forbin376
03-21-2008, 02:44 AM
Pin 3 of IC G can supply the correct clock for either (or both) of the 6850 Chips ICs D & E to operate at 19200 baud. I have inserted a 16-pin IC socket into the clock select pads labeled with the baud rates on the left and the CK0 and CK1 on the right. A short stiff wire, say an end clipped from a resistor, is used as a jumper to select the desired baud rates. I have added a wire from from Pin 3 of IC G to what would be pin 16 of this socket for the additional clock rate. For a more "permanent" selection use an IC Header installed into the socket with your baud rate selection(s) soldered onto it.