Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!lll-winken!csustan!news
From: jb@altair.uucp (John Birchfield)
Newsgroups: comp.sys.ibm.pc
Subject: Re: System boot and INT 19
Keywords: system boot
Message-ID: <1990Jan10.154121.4256@csustan.CSUStan.Edu>
Date: 10 Jan 90 15:41:21 GMT
References: <945@excelan.COM> <77@qmsseq.imagen.com> <357@clover.warwick.ac.uk>
Reply-To: jb@altair.csustan.edu (John Birchfield)
Organization: CSU Stanislaus
Lines: 26

In article <357@clover.warwick.ac.uk> bsrdp@warwick.ac.uk (Hylton Boothroyd) writes:
>In article <77@qmsseq.imagen.com> pipkins@qmsseq.UUCP (Jeff Pipkins) writes:
>> The int 19h vector is supposed to do a warm boot.
>
>I wonder how many of those who repeat these recipes have tried them.
>The use of INT 19 is curiously under-documented even in the MSDOS
>interrupt list.
...
>It remains a mystery how to replicate the warm start effect of
>Ctrl-Alt-Del.  [And I have worked through several of the likely things
>in SIMTEL.]


The following c program will do it ...
------------------------------------------------------------------------
int (far *reboot) () = (int (far *) ()) 0xffff0000;

main ()
{
	(*reboot) ();
}
------------------------------------------------------------------------
+----------------------
| John Birchfield      
| jb@altair.csustan.edu
+----------------------