On Mon, Feb 12, 2018 at 9:58 AM, Al Kossow via cctalk <firstname.lastname@example.org> wrote: > >> Any technical reason you used Teledisk instead of ImageDisk? Can >> Teledisk do something with these disks that ImageDisk cannot? >> > > Imagedisk can't handle mixed sector sizes on a track.
I had forgotten about that. I vaguely remember running into that issue working with some other HP disks, or .TDO images of HP disks. I rebuilt a modified version of one of the ImageDisk tools from the source code to work around the issue at the time. I don't remember the details now. Just found some notes on this from 5 years ago. At the time it was an issue with TD02IMD.COM. For example TD02IMD.COM chokes on this disk image with the "Cannot do mixed sector size within track" error: http://www.hpmuseum.net/software/WORDSR80.TD0 I solved that at the time by modifying TD02IMD.COM to allow it to simply discard the other sized sectors, which after taking a look didn't appear to be necessary.