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Path: utzoo!watmath!clyde!rutgers!lll-lcc!well!ljz
From: ljz@well.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Code to perform warm reboot.
Message-ID: <2611@well.UUCP>
Date: Thu, 19-Feb-87 15:28:38 EST
Article-I.D.: well.2611
Posted: Thu Feb 19 15:28:38 1987
Date-Received: Fri, 20-Feb-87 21:09:51 EST
References: <3258@j.cc.purdue.edu> <424@omepd>
Reply-To: ljz@well.UUCP (Lloyd Zusman)
Distribution: world
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 12
Keywords: cold boot, warm boot, IBM PC
Summary: INT 19h

In article <424@omepd> perry@inteloa.intel.com (Perry The Cynic) writes:

>There is a simple way to perform a real `warm' boot on an IBM PC. Just do
>an `INT 19H' instruction. This will reload MSDOS and restart the configuration
>process (reading CONFIG.SYS, executing AUTOEXEC.BAT etc.) without first doing
>the hardware checks. Believe me, it's faster.

But INT 19h can't be counted on to work in all compatibles.  Try it on
some of them and you'll see mixed and discouraging results.  If your
machine happens to be a "well-behaved" compatible, then you're in luck.
Otherise, a jump to f000:fff0 is the way to go, as it seems to work on
clones as well as IBM products.