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Subject: Re: Creating a copy protected floppy
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Date: Thu, 14 Jul 2005 08:32:20 +0300
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To: djgpp AT delorie DOT com
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RetroMIDI wrote:
> It is possible to write EXTRA sectors on a particular track so that the
> sector numbers are within the data sections of lower numbered sectors.

You do not need to mess the sectors up this way, however, if you don't 
want to. An easy way to "hide" some of your data (although not so hard 
to get around with, either) is to format a disk with more than the 
standard number of sectors on tracks (and with more tracks), while 
retaining the standard DPB (disk parameter block), so a "normal" copy 
program only copies the standard sectors and tracks, ignoring the 
nonstandard ones. For those interested, see Ralf Brown's interrupt list,

http://www.ctyme.com/intr/cat.htm

especially the DPB:

http://www.ctyme.com/intr/rb-2445.htm

-atl-
-- 
A multiverse is figments of its own creations