Re: Did Commodore cheat with the quad density floppies?

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Thu, 3 Jan 2019 15:20:10 +0100
Message-ID: <CAESs-_x9WyjYNJPt1j2tc94YT5k6DHRS41wLbU8=j=P+s70FeQ@mail.gmail.com>
On Thu, Jan 3, 2019 at 3:13 PM Gerrit Heitsch <gerrit@laosinh.s.bawue.de> wrote:
>
> the (german) user manual that came with my 8050 back then mentioned
> 'single density' as the disks required. Not that I ever tried that,
> always used DD.
>
Also SD didks don't really "exists", in the sense they are the same
original 300 oersted media. If you record it with FM at 125 Kbps, you
get
the so called "single density". Densities rather refer to the
modulation scheme used, rather than the actual media used.
SD/DD/QD is the same media, with different mechanisms (the 48TPI vs
96TPI vs 100TPI mechanics/heads) and with different modulations.
Again, I suggest reading the fine informations contained here:
http://www.retrotechnology.com/herbs_stuff/drive.html

Frank
Received on 2019-01-03 16:01:56

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