Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!snorkelwacker!tut.cis.ohio-state.edu!cica!iuvax!watmath!mks.com!andy
From: andy@mks.com (Andy Toy)
Newsgroups: comp.sys.ibm.pc
Subject: Re: More than 15 files open
Message-ID: <1989Dec19.161509.10803@mks.com>
Date: 19 Dec 89 16:15:09 GMT
References: <1989Dec17.150044.18175@axion.bt.co.uk> <5831@eos.UUCP> <1989Dec18.164450.3079@mks.com>
Reply-To: andy@mks.com (Andy Toy)
Organization: Mortice Kern Systems, Waterloo, Ontario, Canada
Lines: 17

Here's some more information that may be helpful that someone else
here pointed out to me.
--
1) The FILE=nnn in config.sys represents that number of separate opens
   on a system wide basis (this doesn't include dup() requests or the
   implicit dup() that occurs when a process forks (or exec))

2) The 20 file limit of the file descriptor table per process may be increased
   by putting a different pointer into the PSP (currently there is a
   seg:offset address inside the PSP to a 20 byte area in the PSP for
   the file descriptor codes).  This can be pointed to any other location
   and a new size given (e.g. 200 open files).  The limit is probably
   255 because FF is reserved to mean that that entry is closed)
-- 
Andy Toy, Mortice Kern Systems Inc.,       Internet: andy@mks.com
  35 King Street North, Waterloo,       UUCP: uunet!watmath!mks!andy
      Ontario, CANADA N2J 2W9      Phone: 519/884-2251  FAX: 519/884-8861