Archiving CP/M 2.2 Source Code Programs to a PC (Fat or NTFS media)

Robo58 robo58 at
Fri Jan 15 09:32:12 CST 2016

Hi Fred,

Thanks for the reply.  The 8" SD diskettes are standard IBM format (I
believe 3740 physical format) 26 sectors.  I believe the  8" DD follows the
same 3740 physical format but has 1024 byte sectors and that they could vary
as to either 8 or 9 sectors/track.

Regarding the 5.25" HD diskettes.  I believe they are duplicates of the 8"DD
just using the smaller media.

The hardware is custom so there is no unique base of users or other software
to leverage.  There are two different platforms, both Z80 one platform uses
the Western Digital 1771 floppy controller, the second platform was newer at
the time and is Z80 with WD 1791 floppy controller.  

Thanks Robo

-----Original Message-----
From: cctalk [mailto:cctalk-bounces at] On Behalf Of Fred Cisin
Sent: Friday, January 15, 2016 10:10 AM
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at>
Subject: Re: Archiving CP/M 2.2 Source Code Programs to a PC (Fat or NTFS

On Fri, 15 Jan 2016, Robo58 wrote:
> Hi Folks,
> I have many diskettes worth of CP/M 2.2 assembler source code and 
> programs that I'd like to archive in the PC environment.  I'm worried 
> that my media is degrading and I want to move it before it's too late.
> The media is mostly 8" SD or DD, there are also some 5.25" HD diskettes

Are the "8" SD" standard 8" SSSD?
What format are the 8" DD?
What format are the 5.25" HD?   Are you SURE that they are HD?

> I have the original hardware and can view the media and run the programs.

What make and model?  There are approximately 2500 mutually incompatible
CP/M disk formats.

> I'm looking for suggestions on how to move it to the PC environment.

More information about the cctalk mailing list