Date   : Sat, 26 Aug 2006 22:55:22
From   : Pete Turnbull <pete@...>
Subject: Re: writing and reading on 3.5 floppy

Hi, Jonathan.

On Aug 26 2006,  1:44, Jonathan Graham Harston wrote:

> Is there an actual correct explanation for why using 3.5" disk
> drives with DFS 1.20 gives "Disk Error 10"? I've given up and just
> say "DFS 1.21 works with 3.5" drives by ignores Disk Error 10".

You'll have seen my response to the list, and perhaps even ploughed
through the webpage I set up, if you're sufficiently determined.  What
I've not said, though, is that the drives I know of that suppress the
INDEX pulse are TEAC FD235-HF.  It may be that others do as well, but
that series is the only one for which I have full data sheets and which
do the suppression.

On those TEAC drives, the suppression option, or masking as TEAC
sometimes call it, can be disabled by inserting a jumper for HMK (half
mask) or NMK (no mask).  Not only that, but normally the masking is
gated with the write line, so it doesn't affect reading.

I wondered if the above matches your experience?


--
Pete                                            Peter Turnbull
                                                Network Manager
                                                University of York