Archiving otrona attache disks

[Fred Cisin]

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