[Coco] DYSAN Digital Diagnostic Disk..........

[Arthur Flexser]

I'd imagine that what is in the archive is the CoCo software that goes with
the non-copyable Dysan alignment disk.  The program was called J&M Memory
Minder, from the folks that sold JDOS and J&M controllers.

http://www.vcfed.org/forum/archive/index.php/t-50774.html

Art

On Wed, Dec 20, 2017 at 11:00 AM, Gene Heskett <gheskett at shentel.net> wrote:

> On Wednesday 20 December 2017 10:25:16 Bill Pierce via Coco wrote:
>
> > It looks like that has the reference disk, which is rare. The
> > alignment disk itself is in the archives.
> >
> And the archive data copy is no good. Those disks are made individually,
> each track made on a series of purposely miss-adjusted drives, and to
> copy them from a 'normal' drive to a normal drive destroys the errors
> except for the loss of amplitude the errors cause on a supposedly well
> adjusted drive. Doing the copying from a somewhat maladjusted drive is
> even worse.  So a copy is about as usefull as the appendages on the
> belly of a boar hog when it comes to diagnosing a maladjusted drive.
>
> Since they can't be accurately copied, thats the reason for the to us,
> outrageous price if indeed its a genuine Dyson drive test disk. Thats
> several times the cost from Dyson when Dyson had them for sale. I
> faintly recall a price of around $25 all those yeares ago.
>
> If you really, really need  one, check with whats left of Dyson and see
> if they have any left.  Or pay the ebay price if the seller can certify
> it is an original, money back, no argument if not. And even then you
> take your chances at such as center hole edge damage. That disk may be
> 25 years old, and shoved into many many unknown drives, with perhaps
> magnetized heads which could do a partial erasure.
>
> > Bill Pierce
> > "Charlie stole the handle, and the train it won't stop going, no way
> > to slow down!" - Ian Anderson - Jethro Tull
> >
> > My Music from the Tandy/Radio Shack Color Computer 2 & 3
> > https://sites.google.com/site/dabarnstudio/
> > Co-Contributor, Co-Editor for CocoPedia
> > http://www.cocopedia.com/wiki/index.php/Main_Page
> >
> > E-Mail: ooogalapasooo at aol.com
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: Joe Schutts via Coco <coco at maltedmedia.com>
> > To: coco <coco at maltedmedia.com>
> > Cc: Joe Schutts <j_schutts at yahoo.com>
> > Sent: Wed, Dec 20, 2017 7:43 am
> > Subject: [Coco] DYSAN Digital Diagnostic Disk..........
> >
> > Hi Everyone,I came across something today that SOME people might find
> > interesting (OR need). A DYSAN Digital Diagnostics disk on sale on
> > E-Bay for $100.00 US. I'm sure that there are some of you out there
> > that need to re-adjust your Floppy Disk Drives and this would be an
> > excellent addition. Who knows, you just might start up a new
> > profession fixing disk drives...Anyway, here's the link and good luck
> > fixing disk
> > drives...www.ebay.ca/itm/VINTAGE-DYSAN-3-1-2-ALIGNMENT-AND-DIAGNOSTIC-
> >CE-DISKETTES-/112575319782?hash=item1a36030ee6:g:IlwAAOSwxTlZxuZcJoe...
> >| | | | $100.00 |  | | || |  | VINTAGE DYSAN 3 1/2 ALIGNMENT AND
> > DIAGNOSTIC CE DISKETTES | eBayVINTAGE DYSAN 3 1/2 ALIGNMENT AND
> > DIAGNOSTIC CE DISKETTES | Computers/Tablets & Networking, Vintage
> > Computing, V... | | |-- Coco mailing
> > listCoco at maltedmedia.comhttps://pairlist5.pair.net/mailman/listinfo/co
> >co
>
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
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>
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