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?