I found this program searching for a way to add a ZIP drive as storage to a CMD Hard Drive. There are full docs on the disk but unfortunately I don't have any screenshots of the program in operation because I don't have a CMD HD hooked to my test rig. Here is a blurb from the docs on the disk:
This porgram was written to use another SCSI device (e.g. ZIP,
HD, SyQuest) which is connected to a CMD-HD. There are two seve-
ral programs: One for the C128 (only 80 columns) and one for the
C64. The assembly program is used by both programs und must be
placed on the start drive.
|System|| Commodore 64|