Mailing-List:	contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT sources DOT redhat DOT com>
List-Help:	<mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT sources DOT redhat DOT com
Delivered-To:	mailing list cygwin AT sources DOT redhat DOT com
Date:	Tue, 24 Jul 2001 13:05:45 +0200
From:	Corinna Vinschen <cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Read/write IO ports on NT
Message-ID:	<20010724130545.R629@cygbert.vinschen.de>
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<00bb01c11429$97024e90$0a090dc0 AT localhost>
Mime-Version:	1.0
User-Agent:	Mutt/1.2.5i
In-Reply-To:	<00bb01c11429$97024e90$0a090dc0@localhost>; from cm@ttl-3d.co.uk on Tue, Jul 24, 2001 at 11:15:40AM +0100

On Tue, Jul 24, 2001 at 11:15:40AM +0100, Clive Mayo wrote:
> Hi
> 
> Trying to read and write directly at IO port on NT, using the following code
> 
> int main()
> {
>  __asm("mov $1, %al");
>  __asm("mov $0x3f8, %dx");
>  __asm("out %al, %dx");
>  return 0;
> }
> 
> also tried
> 
> int main()
> {
>  _outp(0x378, 1);
>  return 0;
> }
> 
> but get the following exception, Privileged instruction.
> Any suggestions or pointers of how to code this.

You can't on NT. Use standard file IO.

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/

- Raw text -