DECmate II disk image tooling?

Ray Jewhurst raywjewhurst at
Sat Mar 12 16:55:08 CST 2022

I'm not sure what would be on the "System Disks“ but it's probably OS/78 or 278. As far as the CP/M disks and the 8-bit component of the disks, those are for the Z-80 expansion card which Simh does not emulate.


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From: cctech <cctech-bounces at> on behalf of David Schmidt via cctech <cctech at>
Sent: Saturday, March 12, 2022 3:20:15 PM
To: General Discussion: On-Topic Posts <cctech at>
Subject: DECmate II disk image tooling?

I have some disks that look like they're from a DECmate II computer,
standard RX50K drives.  The disk images all look like they're a mix of
12-bit (OS/78 or OS/278?) and 8-bit all on the same media.  I can't
convince PUTR to make sense of the images, so I'm wondering if there is
anything else out there that is likely to be able to examine the disk
contents?  I'm really looking for PUTR-like functionality to list and copy

Maybe SIMH could be configured to be a DECmate II and be fed the disks?

I have a couple of disk images available in case anyone wants to try them
out - they're purported to be "DECmate II CP/M 2.2 version 2.0" and "System
Disk ver. 2.0 8/24/87":

- David

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