ping@cubmol.bio.columbia.edu (Shiping Zhang) (01/10/91)
I'm not sure if this group is the right one for my question. 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, or is there way to write a command in C to reboot the machine. Thanks for any information. -ping ping@cubmol.bio.columbia.edu (128.59.128.3)
bank@lea.ncsu.edu (Dave The DM) (01/19/91)
In article <1991Jan10.013850.3506@cubmol.bio.columbia.edu> ping@cubmol.bio.columbia.edu (Shiping Zhang) writes: >I'm not sure if this group is the right one for my question. 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, or is there way to write a command >in C to reboot the machine. Thanks for any information. > >-ping ping@cubmol.bio.columbia.edu (128.59.128.3) If you want something "off-the-shelf" then check out PC Magazine's DOS Powertools book. Has a program called WARMBOOT.COM that will do exactly what you want. Also has COLDBOOT.COM to simulate a power-off reboot. If you want to do-it-yourself, any good BIOS reference or PC tech reference will give you the necessary information. I probably have it somewhere around here, but its likely buried under a lot of garbage and I'm too laze to look...:-) Dave the DM bank@lea.csc.ncsu.edu
mhr@ccicpg.UUCP (MHR {who?}) (01/22/91)
In <1991Jan18.234616.18063@ncsuvx.ncsu.edu>, bank@lea.ncsu.edu writes: > In article <1991Jan10.013850.3506@cubmol.bio.columbia.edu> ping@cubmol.bio.columbia.edu (Shiping Zhang) writes: > >I'm not sure if this group is the right one for my question. 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, or is there way to write a command > >in C to reboot the machine. Thanks for any information. > > > >-ping ping@cubmol.bio.columbia.edu (128.59.128.3) > > Dave the DM > bank@lea.csc.ncsu.edu Here is the assembly language code for both warm and cold boot simulators. I trust that translating into C wouldn't be too difficult for your particular compiler.... warm boot: MOV AX,0040 MOV DS,AX MOV AX,1234 MOV [0072],AX JMP FFFF:0000 cold boot: JMP FFFF:0000 This was posted not so long ago to one of these comp.os.msdos.* news groups (thank you, whoever originally posted it) and I have both assembled into .COM files, and they work. You can even construct them using DEBUG, if you know how (remember to set the CX register before writing). Have a nice day :-) ! -- Mark A. Hull-Richter UUCP: ccicpg!mhr Clever remark stolen from ICL North America InterNet: [coming soon] another netter: 9801 Muirlands Blvd Go ahead, flame me. I have Irvine, CA 92713 (714)458-7282x4539 a /dev/null on my machine.
tbrown@lehi3b15.csee.Lehigh.EDU (Thomas Brown [901015]) (01/22/91)
I've uploaded COLD.COM and WARM.COM to the /pub directory of wuarchive.wustl.edu. They will execute a cold boot (with memory test), or a warm (Ctl-Alt-Del) restart. -Tom --=-- Thomas Brown, KA2UGQ BITNET: twb0@lehigh.bitnet Lehigh University UC Box 855 ARPA: tbrown@lehi3b15.csee.Lehigh.EDU Bethlehem, PA 18015 UUCP: ..!uunet!twb0@lehigh.bitnet (215) 758-0093 AX.25: ka2ugq@ka2ugq.nj.usa.na 'You can't have everything...where would you put it?' -S.W.
ts@uwasa.fi (Timo Salmi) (01/23/91)
In article <1357@lehi3b15.csee.Lehigh.EDU> tbrown@lehi3b15.csee.Lehigh.EDU (Thomas Brown [901015]) writes: >I've uploaded COLD.COM and WARM.COM to the /pub directory of >wuarchive.wustl.edu. They will execute a cold boot (with memory >test), or a warm (Ctl-Alt-Del) restart. : >'You can't have everything...where would you put it?' -S.W. This one is in /pc/ts/tsutld18.arc at uwasa.fi archives. WARMBOOT (Ver. 1.0) Reboot without memory tests =================== Reboot your PC as if alt-crtl-del had been pressed. Usage: WARMBOOT [/b] [/e] [/n] [/t] batch mode -+ ! ! ! execute -+ ! ! no confirmation -+ ! test only, don't actually reboot-+ If there are errors, errorlevel is set to 1 for batch usage. ................................................................... Prof. Timo Salmi (Moderating at anon. ftp site 128.214.12.3) School of Business Studies, University of Vaasa, SF-65101, Finland Internet: ts@chyde.uwasa.fi Funet: gado::salmi Bitnet: salmi@finfun
bsrdp@warwick.ac.uk (Hylton Boothroyd) (01/25/91)
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
ckaye@hemel.bull.co.uk (Chris Kaye) (01/26/91)
bsrdp@warwick.ac.uk (Hylton Boothroyd) writes: >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 Here is a 'C' version of a reboot program. #! /bin/sh # This is a shell archive. Remove anything before this line, then unpack # it by saving it into a file and typing "sh file". To overwrite existing # files, type "sh file -c". You can also feed this as standard input via # unshar, or by typing "sh <file", e.g.. If this archive is complete, you # will see the following message at the end: # "End of shell archive." # Contents: rb.c PATH=/bin:/usr/bin:/usr/ucb ; export PATH if test -f 'rb.c' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'rb.c'\" else echo shar: Extracting \"'rb.c'\" \(384 characters\) sed "s/^X//" <<'END_OF_FILE' | ascbin >'rb.c' X/* X * Program to reboot PC. X * X * Arguments: nothing for cold reboot X * anything for warm reboot X */ Xint far *loc = (int far *)0x472; X Xvoid (far *reboot)() = { (void (far *)()) 0xffff0000 }; X Xvoid main(argc,argv) Xchar **argv; Xint argc; X{ X if (argc>1) X *loc = 0x1234; /* warm boot */ X else X *loc = 0x0000; /* cold boot */ X reboot(); X /* Should not get here */ X exit(0); X} END_OF_FILE if test 384 -ne `wc -c <'rb.c'`; then echo shar: \"'rb.c'\" unpacked with wrong size! fi # end of 'rb.c' fi echo shar: End of shell archive. exit 0 -- -----------------------------+ Chris.Kaye@hemel.bull.co.uk | Bull HN Ltd., Maxted Road, | Hemel Hempstead, HP2 7DZ, UK | -----------------------------+
resnicks@netcom.UUCP (Steve Resnick) (01/29/91)
In article <1991Jan26.122142.9747@hemel.bull.co.uk> ckaye@hemel.bull.co.uk (Chris Kaye) writes: >bsrdp@warwick.ac.uk (Hylton Boothroyd) writes: > >>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. Waitaminit! The code at FFFF:0000 *HAS* to reboot the computer. This is the address where the 8086 fetches the fisrt instruction on reset. If the code there cannot reboot the computer, something is *VERY* wrong with the computer, or it is not an iAPX processor. By the way, folks, I have been reading this newsgroup for a number of years, and this question comes up about once every 6 weeks. This information is in the FAQ (Frequently Asked Questions) list and Ralf Brown's Interrupt List. Steve -- ------------------------------------------------------------------------------- resnicks@netcom.com, apple!camphq!105!steve.resnick, IFNA: 1:143/105.0, USNail: 530 Lawrence Expressway, Suite 374 Sunnyvale, Ca 94086 - In real life: Steve Resnick. Flames, grammar and spelling errors >/dev/null 0x2b |~ 0x2b, THAT is the question. -------------------------------------------------------------------------------
bsrdp@warwick.ac.uk (Hylton Boothroyd) (01/29/91)
> > > [ assembly language code for both warm and cold boot ending > > > 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. > > Waitaminit! The code at FFFF:0000 *HAS* to reboot the computer. This > is the address where the 8086 fetches the first instruction on > reset. If the code there cannot reboot the computer, something is > *VERY* wrong with the computer, or it is not an iAPX processor. In effect, the true blue behaviour offers a method of avoiding full cold boot at FFFF:0000 before going on to the required behaviour. Not all clones offer the true blue avoidance mechanism. And although that is occasionally annoying, there is nothing very wrong with them! Hylton -- 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