Xref: utzoo comp.unix.questions:16093 comp.sys.ibm.pc:34042 unix-pc.general:3665
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!rutgers!dptg!mtunb!jcm
From: jcm@mtunb.ATT.COM (was-John McMillan)
Newsgroups: comp.unix.questions,comp.sys.ibm.pc,unix-pc.general
Subject: Re: Convergent MiniFrame Diskettes
Summary: Maybe not...
Keywords: MiniFrame Diskettes Format
Message-ID: <1647@mtunb.ATT.COM>
Date: 1 Sep 89 14:43:25 GMT
References: <1210@mitisft.Convergent.COM>
Reply-To: jcm@mtunb.UUCP (John McMillan)
Organization: AT&T ISL Middletown NJ USA
Lines: 27

In article <1210@mitisft.Convergent.COM> dold@mitisft.Convergent.COM (Clarence Dold) writes:
:
>There is a donated Convergent MiniFrame running SysV 2.0, or something
>close to it.   ...
>The Convergent has a 5 1/4" diskette, driven by a WD2797 that I know is
>physically capable of read-write of MSDOS 360K diskettes, since the same 
>diskette hardware under the Convergent CTOS has an MSWRITE and MSREAD utility.
>Not for UNIX however.
>I need either a program or some portion of 'c' source that might get me 
>started in that direction.
>The drive is normally 720K, 96TPI but only double density (unlike the 3B1).
:

The game is, ya gotta use only every other track.

When we had a few MF's around, the driver permitted READING UnixPC
floppies on the MF.  I seem to recall the driver we had was a hack
from CT and I don't know it was ever "released".
(CT should have SOME record of the earlier driver.)

Writing SINGLE DENSITY floppies is a more questionable game:
start with a virgin floppy and MAYBE one properly written on
a double density drive can be read by SINGLE DENSITY systems.

I think Pete Fales has more to add here.

john mcmillan	-- att!mtunb!jcm