So what FMS interface do you have now ? There are serial to USB converters for use with PIC serial leads and of course you can buy or build a dedicated USB interface. If you have a parallel or old style serial interface I think you'll have to get a new one as there are no USB converters that work with those.
sorry Steve, away for a couple of days
Yes I have FMS serial interface bought from Page Electronics (in Australia) with a female 9 pin plug , at the computer end. Radio is JR
Supplier phone number disconnected and email address no longer exists
R