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From: djh@neuromancer.metaphor.com (Dallas J. Hodgson)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: copy protection
Message-ID: <1443@metaphor.Metaphor.COM>
Date: 19 Sep 90 21:16:28 GMT
References: <20351@orstcs.CS.ORST.EDU>
Sender: news@metaphor.Metaphor.COM
Reply-To: djh@neuromancer.metaphor.com (Dallas J. Hodgson)
Organization: Metaphor Computer Systems, Mountain View, CA
Lines: 27

In article <20351@orstcs.CS.ORST.EDU> rudolpe@urubu.CS.ORST.EDU (RUDOLPh ERIC) writes:
>I was wondering how copy protection is done on commercial disks.
>How are the following implemented AND/OR cracked?
>1. Long tracks.
>2. No sector header.
>3. No sync mark.
>4. Funny end of track gaps.
>5. The infamous mangled MFM format and mangled bit pattern.
>
>Can anyone tell me how to make a syncro express? I have some ideas, but
>I am not sure if they are right.

This should really have been posted to comp.sys.amiga.tech.

Step # 1 can be recreated simply by adjusting your floppy's drive speed pot.
All the other steps are under your control when you perform a raw MFM write
(format) to the floppy.

Commercial copy machines are more flexible than standard floppy drives.
+----------------------------------------------------------------------------+
| Dallas J. Hodgson               |     "This here's the wattle,             |
| Metaphor Computer Systems       |      It's the emblem of our land.        |
| Mountain View, Ca.              |      You can put it in a bottle,         |
| USENET : djh@metaphor.com       |      You can hold it in your hand."      |
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| "The views I express are my own, and not necessarily those of my employer" |
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