delorie.com/archives/browse.cgi   search  
Mail Archives: djgpp/2000/07/23/09:16:07

Newsgroups: comp.os.msdos.djgpp
From: manni DOT heumann AT gmx DOT de (Manni Heumann)
Subject: Re: GPF with system() and clock int.
References: <FG_d5.95$tab DOT 135467008 AT newsb DOT telia DOT net>
X-Newsreader: News Xpress 2.01
Mime-Version: 1.0
Date: Sun, 23 Jul 2000 13:06:07 GMT
NNTP-Posting-Host: ppp36-211.hrz.uni-bielefeld.de
Message-ID: <397aedc6_1@news.uni-bielefeld.de>
X-Trace: 23 Jul 2000 15:06:14 +0200, ppp36-211.hrz.uni-bielefeld.de
Lines: 22
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hi Eric,
I am not sure if this is related to the crashes you experience. But 
aren't you supposed to outportb (0x43, 0x36) before changing the 
timer's frequency?




I.e. before you do that:
   outportb(0x40,0x00);  /* Setting 16x clock tick frequency */
   outportb(0x40,0x10);  /* ...will trigger the error easily */

or that:
   outportb(0x40,0x00);  /* Reset clock tick frequency */
   outportb(0x40,0x00);


--

Manni

Life would be much easier if I had the source code.

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019