On Fri, 13 Dec 2019, Chuck Guzis via cctalk wrote:
MDS was my guess also. The MDS boxes ran the standard CP/M distro from
DRI--no customization needed. (The same was true for MP/M--a second
console was provided via the current-loop interface).
At any rate, it all fits. I wouldn't be surprised if all the floppies
were SS FM ones.
The 2 sided ones could be a different system, or the user added a drive
that could use them (or modified a drive - they look like they were used
in hardware development), or he had a hole punch (a glimpse of one of
those outisde of its sleeve would confirm)
