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>
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Date: Sun, 23 Jul 2000 13:06:07 GMT
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To: djgpp AT delorie DOT com
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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.