From what I've read, the first Apple II floppy drive (the Disk II) wasn't invented until about six months after the release of the Apple II - so the computer's ROM code wouldn't have had any support for loading data from a floppy disk. If you owned one of those first Apple II's and later bought a Disk II, how did the computer know how to use it? Did the Disk II also come with a replacement ROM chip for the computer's logic board? Or does the Apple II somehow execute code that's stored in ROM on the Disk II controller card?