Comments:	Authenticated sender is <david AT diablo DOT eimages DOT co DOT uk>
From:	"David Cantrell" <david AT diablo DOT eimages DOT co DOT uk>
To:	opendos AT mail DOT tacoma DOT net
Date:	Fri, 28 Feb 1997 10:12:24 +0000
MIME-Version:	1.0
Subject:	Re: [opendos] CP/M use of high bits in filenames; was: Wishlist
Reply-to:	david AT diablo DOT eimages DOT co DOT uk
In-reply-to:	<01IFXD1YP5WI8YSMTY@cc.usu.edu>
Message-ID:	<1354997619-3457264@diablo.eimages.co.uk>
Sender:	owner-opendos AT mail DOT tacoma DOT net

> Under CP/M, the first character in the directory entry was not the first
> character of the name. It contained the user number (0x00 through 0x0f) for a
> file which was not deleted or 0xe5 for a deleted file. If it contained anything
> else, you couldn't get to the file. 

I wrote a little thingy which gave hierarchical subdirectories on a 
CP/M 2.2 disk. It used the 'unused' user areas 0x10 to 0xfe 
(excluding 0xe5) for the different directories, and a control file in 
user area 0xff to map user areas to names (of up to 8 chars).  It 
supported something similar to symlinks for directories as well, by 
mapping multiple names onto a single user area.

-- David Cantrell, http://www.eimages.co.uk/users/davidc/

Power is both corrupting and dangerous when unchallenged and
concentrated in the hands of the majority.  Voices of tolerance
and compassion are easily drowned.
      -- Akbar S. Ahmed

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