I'll add a partially working driver for the disk station soon. Here's a screenshot of it with no disk inserted:
Disks boot too, but the keyboard seems erratic:
It doesn't boot the disk you provided though, this is this one: ftp://ftp.informatik.uni-stuttgart.de/pub/cm/mupid/disks/mcpm.imd
There is also an alternate firmware for it at ftp://ftp.informatik.uni-stuttgart.de/pub/cm/mupid/roms/
This seems to be the Grundig FL100? Screenshot:
Maybe it expects some kind of special terminal?