Actually, the 765 handles it fine ... my original software stored only the physical head indicator per track - now I can store a map of indicators for each sector, and it reads/formats/writes Kaypro (and Zorba which does the same thing) disks without issue. You do have to tell the 765 what "head" you are reading in the ID field, but fortunately you can do this imdependantly of the physical head select - I determine all the sector headers in the analysis phase, so I "know" which heads to request now... Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html