This is Memory Map version 2.54, it also has Map Update 2.53 (with a
date of February 27, 1988). The disk has a date of 1986 on it and the
name of Paul Cozza.
This software is available to download in a few formats:
Memory Map V2.54.dc42.mac is a DiskCopy 4.2 image file encoded in a
MAR (.mar/.mac) file.
Memory Map V2.54.dc42.sit.hqx is a DiskCopy 4.2 image compressed in a
StuffIt v5.5 archive.
Memory Map V2.54 f.mar is a copy of the disk to a folder and encoded
in a MAR (.mar/.mac) file.
Memory Map V2.54 f.sit.hqx is a copy of the disk to a folder and
compressed in a StuffIt v5.5 archive.
Memory Map V2.54.dc42.zip is Zip archive of the dc42 disk image file.
This will work well for emulators but will not mount within the Mac OS
because it lacks a resource fork/file information.