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From: Matthias Andree <matthias.andree@gmx.de>
To: linux-kernel@vger.kernel.org
Subject: Re: Copy protection of the floppies
Date: Tue, 25 Nov 2003 11:55:15 +0100	[thread overview]
Message-ID: <20031125105515.GA8887@merlin.emma.line.org> (raw)
In-Reply-To: <yw1xu14sdbwo.fsf@kth.se>

On Tue, 25 Nov 2003, Måns Rullgård wrote:

> YOSHIFUJI Hideaki / .$B5HF#1QL@.(B <yoshfuji@linux-ipv6.org> writes:
> 
> > Basically, it depends on what kind of equipment you and the enemy
> > have.  If you have special equipment and technique to write a
> > floppy, you can make a floppy which is not copiable by normal PCs.
> > But, if the enemy has similar equipment, he can do it.
> >
> > About 15 years ago, there were many gaming softwares which were procected,
> > for example, by checking "gap" between sectors.
> 
> Can't that be done with a regular floppy drive and some special
> software?

It depends. Checking gap length (exactly) and location of one track
relative to the next would require drives with synchronized spindles to
copy the data iff the gap information is used as encryption key. Whether
Linux is up to the task, is something different. Last time I tried such
a thing was in the good old Commodore 1541 days which also supported
half-steps between tracks and stepping after 1/3rd track or some things.

  reply	other threads:[~2003-11-25 10:55 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-11-25  5:37 Copy protection of the floppies Pravin Nanaware , Gurgaon
2003-11-25  9:07 ` Murray J. Root
2003-11-25  9:12 ` Måns Rullgård
2003-11-25  9:28 ` YOSHIFUJI Hideaki / 吉藤英明
2003-11-25  9:40   ` Måns Rullgård
2003-11-25 10:55     ` Matthias Andree [this message]
2003-11-25 16:07     ` Ricky Beam
2003-11-25 18:37       ` Nick
2003-11-25 20:07         ` Richard B. Johnson
2003-11-25 20:52         ` Ricky Beam
2003-11-26  3:55         ` Gene Heskett
2003-11-25 10:47 ` Helge Hafting
2003-11-25 20:18 ` Antonio Vargas
2003-11-25 20:32   ` Måns Rullgård
2003-11-26  3:58     ` Gene Heskett
2003-11-27  6:07 ` Willy Tarreau

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