I ran
Nobeltec VNS on a XP years ago (dell laptop) connected to a
Garmin handheld.
Was connected thru what I believe would be called a
serial port??
(a trapezoid?? with a number of male/female prongs with a thumbscrew on each side)
Cable (from Garmin) connected to GPS, to computer.
Still have computer in basement and all Nobeltec discs which guess now worthless.
Side note...Above worked great until Nobeltec kindly helped me solve a minor problem
by taking
remote control of computer and from then on Nobeltec and the GPS never talked to each other again.
Although now surely outdated, I did enjoy Nobeltec and think maybe still good for some
planning.
Hope this will help.