On Sun, 10 Sep 2023, Chuck Guzis via cctalk wrote:
Can't say, but probably. I've got an 8" disk here written by an Apple II. Encoding is weird--basically the Apple RWTS encoded as 8 bit FM (3740) bytes. Haven't bothered to see from whence it came.
Sorrento Valley Associates sold an FDC for Apple2. At Comdex, they had it wired to an 8" drive. So, perhaps they supported an FM version of the Apple2 GCR format?