Tried ImageDisk on some Kaypro disks this morning... Buggers recorded side1 as additional sectors of side0. The different set of sector numbers didn't bother ImageDisk, but it had a bit of a tantrum with the Head ids which didn't match the physical head selection. I can imagine that someone somewhere does weird things with the Cylinder ids on a track as well ... So .. as of a few minutes ago, ImageDisk can handle non- standard Cylinder and Head ids on individual sectors. I added this in a way which is backward compatible with the existing image file format - basically, I used two unused bits at the top of the track Head indicator to indicate the presence of a "sector Cylinder map", and/or a "sector Head map" - these maps will be present when the track contains cylinder/head values which do not match the physical location of the track. I'll post the updated version later today after I have done some further testing. 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