There is an old thread about MDM on CD-ROM.

Wonder if anyone has an .iso image they could make available or would burn a copy of the CD if I sent them a blank CD and a return mailer?

The latest version discussed was: Version 5.0, Release 139

A late version on RX-50's would be OK. Must be late enough to know the RD-30 series disks. I have copied some RX-50 images off the net already, and transcribed them with PUTR, but they are a very early version of MDM and don't know the RD-30 series disks.

Regards -- Dean