Archiving otrona attache disks

Bill Degnan billdegnan at
Thu Sep 2 10:52:45 CDT 2021

I have an Otrona Attache disk, I've imaged using Dunfield's Image Disk
If there is interest, please download and create a disk and try to use the
disk on your Attache or MAME emulating an Otrona Attache.  Let me know if
you run into any problems.  I am not sure if this particular disk image
results in a bootable disk or if it's a data disk (WordStar files).

On Fri, Aug 20, 2021 at 9:09 PM Fred Cisin via cctech <cctech at>

> On Fri, 20 Aug 2021, Bill Degnan via cctech wrote:
> > Is there a simh for the otrona attache?  I have some.disk images created
> > with Dunfield's utility..if not I will try to read them by using the
> Zorba
> > portable, which is pretty good with varied formats.
> > Bill
> Otrona is fairly straightforward for format conversion.
> CP/M and MS-DOS.  There might have been other operating systems for them,
> but I didn't run into any.
> They had 40 track and 80 track drives.
> 512 bytes per sector, so they can be done using Int13h, without even
> needing Int1Eh.
> 10 sectors per track;  inter-sector gaps were tight but not unreasonable.
> I don't remember whether they were numbered 0 - 9 or 1 - 10

More information about the cctalk mailing list