I have this old card, a Future Domain TMC-1680 ISA SCSI card that has a 34-pin floppy disk connector on it. I am trying to research that to see if I can make it work (before anyone asks - just for the hell of it!).
I don't even know if it's a "standard" floppy interface. It certainly looks like one, and a standard floppy cable fits. But I've heard about SCSI floppies, so am not sure. And without any documentation I've had little success making the card do anything at all.
One thing that I have discovered about this card is that its driver has been removed from the Linux kernel (after 4.16, so it's only recently happened). So I'll have to use a pre-4.17 kernel if I want to use this card.
I have been unable to find any documentation for the card. If there is a source of documentation or other information that would be very welcome.