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From: binder@nacho.DEC.COM ("Exit, pursued by a bear")
Newsgroups: net.micro.apple
Subject: Re: Files not on Catalog
Message-ID: <8610101235.AA10741@decwrl.dec.com>
Date: Fri, 10-Oct-86 11:26:00 EDT
Article-I.D.: decwrl.8610101235.AA10741
Posted: Fri Oct 10 11:26:00 1986
Date-Received: Sat, 11-Oct-86 20:08:15 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 32

>> Does anyone know how to find out the names of files that do not
>> show up when you type in CATALOG.  I know they are on the disk.
>> How do you go about accessing them?

> One way is to use Copy ][+ or some such utility and use the 'undelete'
> facility (I am assuming that the files were deleted, or else how would the
> files be on the disk?) 

The files would have been on the disk, but not necessarily in the normal way.  
There are at least two simple ways I know of, to use things that won't show up 
in the catalog.  Both ways are usually applied to disks that come without copy
protection, to slow down pirates just a little. 

1.  The files could be there in a specific place on the disk that a named 
    program knows about and can access directly via RWTS.  If the disk is like
    this, then FID will miss copying the "hidden" files because it copies by
    catalog filenames.  The Diversi-DOS master disk is made in this way, and
    the docs state explicitly that you must use COPYA to make backups.

2.  The files could be in the catalog with nonprinting characters in the file
    names (^H etc) to cause the names not to be displayed.  I have seen game 
    disks like this, with the catalog actually jimmied up to put a "USE COPYA"
    warning on the screen.

There may be other tricks as well.

Cheers,
Dick Binder   (The Stainless Steel Rat)

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