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Article #4363Re: rebooting by a command, not by Ctrl-Alt-del or power off/on
From: Hylton Boothroyd
Date: Thu, 24 Jan 1991 18:36
Date: Thu, 24 Jan 1991 18:36
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In article <12503@ccicpg.UUCP> mhr@ccicpg.UUCP (MHR {who?}) writes:
> > > I want to know how to reboot an IBM pc not by Ctrl-Alt-del, power
> > > off/on, or pressing the reset button methods. In other words, is
> > > there a command I can issue to reboot the machine
> > > -ping ping@cubmol.bio.columbia.edu (128.59.128.3)
> >
> > bank@lea.csc.ncsu.edu
>
> Here is the assembly language code for both warm and cold boot
> simulators.
>
> warm boot:
> MOV AX,0040
> MOV DS,AX
> MOV AX,1234
> MOV [0072],AX
> JMP FFFF:0000
>
> cold boot:
> JMP FFFF:0000
Note that this advice depends on having:
* a true blue IBM PC,
* a clone in which the manufacturer's implementatation of BIOS
code has emulated the true blue behaviour at FFFF:0000 .
There appears to have been a period when some manufacturers felt it
wiser not to emulate IBM warm boot too closely for fear of copyright
action. The clone I use falls into that category.
--
Hylton Boothroyd Janet: h.boothroyd@uk.ac.warwick.cu
Warwick Business School Darpa: h.boothroyd%cu.warwick.ac.uk@relay-nsfnet.ac.uk
University of Warwick Uucp: h.boothroyd@warwick.uucp
COVENTRY, England Earn/Bitnet: h.boothroyd%uk.ac.warwick.cu@UKACRL
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<1991Jan24.183619.11120@warwick.ac.uk>Path:
arc1-ca.pugleaf.net!utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!elroy.jpl.nasa.gov!decwrl!uunet!mcsun!ukc!warwick!bsrdpReferences:
<1991Jan10.013850.3506@cubmol.bio.columbia.edu> <1991Jan18.234616.18063@ncsuvx.ncsu.edu> <12503@ccicpg.UUCP>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!elroy.jpl.nasa.gov!decwrl!uunet!mcsun!ukc!warwick!bsrdp From: bsrdp@warwick.ac.uk (Hylton Boothroyd) Newsgroups: comp.os.msdos.programmer Subject: Re: rebooting by a command, not by Ctrl-Alt-del or power off/on Summary: General method is not general to clones Keywords: Reboot, clones Message-ID: <1991Jan24.183619.11120@warwick.ac.uk> Date: 24 Jan 91 18:36:19 GMT References: <1991Jan10.013850.3506@cubmol.bio.columbia.edu> <1991Jan18.234616.18063@ncsuvx.ncsu.edu> <12503@ccicpg.UUCP> Sender: news@warwick.ac.uk (Network news) Organization: Warwick Business School Lines: 33