From: Daniel Kahlin (tlr_at_stacken.kth.se)
Date: 2002-07-10 22:58:56
On Wed, 10 Jul 2002, Bryan Pope wrote:
> And thusly Nicolas Welte spake:
> >
> > track drives, not the old 40 track ones (because the 1541 also has 80 tracks,
> > even if it uses the head from a 40 track drive).
> >
>
> So is it possible to move the 1541's head as if there were 80 tracks?
Yes it is. It's called "halftracks" and has been used for copy
protection. Some of the tracks were shifted a halftrack up or down. You
can't use more than 35-40 tracks though. When reading a halftrack as a
normal track, alot of bit errors will appear, and thus not allowing a
copy.
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