Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!att!dptg!lzsc!hcj
From: hcj@lzsc.ATT.COM (HC Johnson)
Newsgroups: comp.sys.atari.st
Subject: Re: 40-Folder Bug
Summary: both; 1.1 == visit; 1.4 == depth
Message-ID: <1375@lzsc.ATT.COM>
Date: 8 Mar 90 18:02:05 GMT
References: <2105@onion.reading.ac.uk>
Organization: AT&T BL Middletown/Lincroft NJ USA
Lines: 27

In article <2105@onion.reading.ac.uk>, djd1@csug.cs.reading.ac.uk writes:
> 
>     Basically, does anybody know _exactly_ what it is?  I am having some 
> problems with a program that I suspect may be due to the '40-Folder Bug',
> but until I know what it is I cannot do anything about it.
> 
>     Is it that you cannot have folders nested more than 40 deep, or that
> a program (or process) cannot visit more than 40 folders??
> 
TOS in ROMS (1.1 and 1.2) the 40-folder bug is caused from not cleaning 
up after VISITING 40 folders.  It really screws up after that.

TOS in EPROMS (1.4 aka 1.6) the 40-folder is a LIMIT on depth.  You get
a clean error message if you use up your folders.

The fix for both is foldrnnn.prg from atari that adds nnn folders to the
pool.

p.s. the "40" comes from the floppy based systems.  TOS 1.1 etc disk 
drivers usually added "100" more just to give you a fighting chance.
So on a hard disk it was usually a 140 folder bug.  TOS 1.4 does not
have AHDI add the folders as it not necessary to boot successfully.

Howard C. Johnson
ATT Bell Labs
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hcj@lzsc.att.com