-----Original Message-----
From: cctalk-bounces at
classiccmp.org [mailto:cctalk-bounces at
classiccmp.org]
On Behalf Of Barry Watzman
Sent: Friday, December 22, 2006 9:13 AM
To: cctech at
classiccmp.org
Subject: RE: Cylinders versus tracks...
A Cylinder is not a single point; it's the collection of multiple tracks
that are all under the read/write heads whenever the heads are positioned
over that cylinder. It exists only because there are multiple heads.
However, while a double sided floppy drive does have cylinders, some systems
did not take advantage of them and accessed the floppy drive using all of
one side first, then all of the other side, rather than using cylinders
(rather than tracks) sequentially. Both types of access are possible, and
cylinder based access is clearly "better", but not all systems worked that
way.
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I seem to remember DosPlus on trs80 IIRC, and possible LDos referring to the
format on a TRS80 as Cyl X Head Y (1,2) as it formatted.