I have been supporting a system that has been in place since 1985,
that works on a modified DOS on a Corvus OmniDrive.

The kicker, it's not just normal DOS 3.3, it's highly tweaked to get
more than 35 tracks of space per volume.  A modified RWTS uses two
actual volumes as one- instead of accessing 16 sectors, it does 32.
Sectors higher than 16 are mapped the to the next volume.

So a storage space equal to two volumes is available for a single
random access txt file.

The application itself is written in Applesoft BASIC, and doesn't fit
in the ProDOS memory space.

I'm trying to have a failsafe environment to fall back on if I can't
get any more Corvus Omnidrive parts, while they migrate off this onto
something else.

That migration was supposed to happen this week, but it's been put off
due to shenanigans from the software vendor hawking the Windows stuff,
keeping adding more fees to stuff and saying it can't do stuff that
they said it can.

This system as placed in use in 1985, in DOS 3.3, and has been
chugging along ever since.

Ideally, an emulator would be OS X based, though since I know of all
of those.. and none do it.. essentially, Sider emulation.. and heck,
if I needed to I could probably move this guy onto a Sider, I have a
few of those. But that would loose the multiuser bit for the time
being.
--- SBBSecho 2.12-Win32