Ok, I feel stupid, but I switched to #Linux after I no longer had a floppy drive.
How TF do I format a floppy disk in Linux? I need it to work with devices that expect the same standard floppy disk formats used in DOS and Windows. If I remember right, that's FAT12? I don't particularly care if someone gives instructions in GUI or terminal. I've already found out it's /dev/sda... which is not what I was expecting.