Message-ID: <3B44C546.1020507@nic.fi>
From: Antti =?ISO-8859-1?Q?Koskip=E4=E4?= <antti DOT koskipaa AT nic DOT fi>
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: Reseting / turning off computer ?
References: <9hq2q6$cqe$1 AT info DOT cyf-kr DOT edu DOT pl>
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Date: Thu, 05 Jul 2001 22:51:34 +0300
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Organization: NIC Tietoverkot Oy - NIC Data Networks Ltd.
To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Rafal Maj wrote:

> Hi,
> how to reset / turn-off computer ? I remember that this was discussing here,
> but with solution is best ?
> Maybe small example of program that will work both under Lose98 & plain-DOS
> ?
> Thanx,

Reset: outportb(0x64, 0xFE); // works under windows 9x

If you want a "soft" reset (ie ctrl-alt-del type),
do a _farpokeb(_dos_ds, 0x472, 0x1234); before the
outportb. Of course, won't work under windows as
your program runs in V86 mode and the real low memory isn't
mapped blah blah blah...

ATX shutdown: (works under windows too)

#include <dpmi.h>
...
__dpmi_regs r;
r.x.ax = 0x5301;
r.x.bx = 0;
__dpmi_int(0x15, &r);
r.x.ax = 0x5307;
r.x.bx = 1;
r.x.cx = 3;
__dpmi_int(0x15, &r);
r.x.ax = 0x5304;
r.x.bx = 0;
__dpmi_int(0x15, &r);
asm("cli\n\t");
for(;;);

This code is a quick hack and does not check the presence of
APM 1.0. for more info, see Ralf Brown's interrupt list.

--
- Antti