On 9/10/23 12:39, Fred Cisin via cctalk wrote: > On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote: >> There are 40 track derivatives; used for word processing, particularly >> on some Brother models. No big deal; when reading those, one simply >> double-steps a "normal" drive. In any case, as far as I recall, they >> all used Brother's proprietary GCR encoding. I've processed a couple >> hundred of those. > > With the exception, the Epson Geneva PX8 40 track 3.5" was MFM
Got some of those in my rogue's gallery too. The thing that seems to be lost on many is that legacy (i.e. Shugart-interface) floppy drives are very dumb devices. Pretty much don't care what you put on them, so long as it satisfies the bandpass requirements. --Chuck
