TT Scout 555 interface cable
 

I have done some research but cannot find a schematic for a computer to 555
interface. I would like to use a winkey kit and do some contesting. Has
anyone ever built one of these or at least know which inputs and outputs to
connect etc? Is there some kind of "known" pins to use for the serial port
and then for the mic jack on the rig? Thanks for any replies

G. Doughty