STS 6100 autopilot plus furuno gp-30

[lookingglass1970]

Someone stole my fluxgate compass off my boat, cut the wire and unbolted it go figure. Of course my auto pilot doesnt work without a compass anymore.
My question is when I hook up my furuno GP-30 to the 6100 on NMEA m -+
I still get "no comp" on the control unit.
Doesn't the 6100 take the RS232 output from my furuno Yellow and Blue
wires?
I think I need to reprogram the 6100 to take input from the NMEA side but don't know how.


Alternatively I could use a PC to output GPS to the 6100 but that still would
mean (I think ) I need to re program the inputs for the 6100.
Any help would be great thank you.