From:	Erik Berglund <erik2 DOT berglund AT telia DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: GPF with system() and clock int.
Lines:	32
Message-ID:	<kQDe5.332$tab.188572672@newsb.telia.net>
Date:	Sun, 23 Jul 2000 15:04:48 GMT
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manni DOT heumann AT gmx DOT de (Manni Heumann) wrote:
> 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.
>
Hi Manni

I guess you are right, but it worked without it,
probably because some other program already had written
0x36.

--

Erik Berglund
erik2 DOT berglund AT telia DOT com

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