Looking to make up a spare GPS-laptop cable - don't want to pay the
$30-35 that the official factory cable with connector and pigtails
costs just for a backup spare. Furuno says it's proprietary and no
other sources.

The connector is 6 pins, looks like a 7 pin DIN without a center pin.
Anybody know if that works - or something else?

BTW - for my old Furuno to laptop serial port - the cable connections
are Furuno black (ground) goes to pin 5 on the DB9 serial female
connector and Furuno white (signal) goes to pin 2. The serial port
specs are 4800, 1, par=No, 1, Xon/Xoff.