| 1 | ; $Id: DosVmOff.asm 106061 2024-09-16 14:03:52Z vboxsync $
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| 2 | ;; @file
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| 3 | ; 16-bit DOS COM program that powers off the VM.
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| 4 | ;
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| 5 | ; Build: yasm -f bin -i../../../../../include/ DosVmOff.asm -o DosVmOff.com
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| 6 | ;
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| 7 |
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| 8 | ;
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| 9 | ; Copyright (C) 2018-2024 Oracle and/or its affiliates.
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| 10 | ;
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| 11 | ; This file is part of VirtualBox base platform packages, as
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| 12 | ; available from https://www.virtualbox.org.
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| 13 | ;
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| 14 | ; This program is free software; you can redistribute it and/or
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| 15 | ; modify it under the terms of the GNU General Public License
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| 16 | ; as published by the Free Software Foundation, in version 3 of the
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| 17 | ; License.
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| 18 | ;
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| 19 | ; This program is distributed in the hope that it will be useful, but
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| 20 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
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| 21 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 22 | ; General Public License for more details.
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| 23 | ;
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| 24 | ; You should have received a copy of the GNU General Public License
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| 25 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
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| 26 | ;
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| 27 | ; The contents of this file may alternatively be used under the terms
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| 28 | ; of the Common Development and Distribution License Version 1.0
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| 29 | ; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 30 | ; in the VirtualBox distribution, in which case the provisions of the
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| 31 | ; CDDL are applicable instead of those of the GPL.
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| 32 | ;
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| 33 | ; You may elect to license modified versions of this file under the
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| 34 | ; terms and conditions of either the GPL or the CDDL or both.
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| 35 | ;
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| 36 | ; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 37 | ;
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| 38 |
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| 39 |
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| 40 |
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| 41 | %include "VBox/bios.mac"
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| 42 |
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| 43 | org 100h
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| 44 |
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| 45 | segment text
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| 46 | main:
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| 47 | %if 0
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| 48 | ; Setup stack.
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| 49 | mov ax, stack
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| 50 | mov ss, ax
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| 51 | mov sp, top_of_stack
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| 52 | %endif
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| 53 |
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| 54 | ; Do the shutdown thing.
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| 55 | mov ax, cs
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| 56 | mov ds, ax
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| 57 |
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| 58 | mov bl, 64
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| 59 | mov dx, VBOX_BIOS_SHUTDOWN_PORT
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| 60 | mov ax, VBOX_BIOS_OLD_SHUTDOWN_PORT
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| 61 | .retry:
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| 62 | mov cx, 8
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| 63 | mov si, .s_szShutdown
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| 64 | rep outsb
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| 65 | xchg ax, dx ; alternate between the new (VBox) and old (Bochs) ports.
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| 66 | dec bl
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| 67 | jnz .retry
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| 68 |
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| 69 |
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| 70 | ; Probably not a VBox VM, exit the program with errorlevel 1.
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| 71 | .whatever:
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| 72 | mov ax, 04c01h
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| 73 | int 021h
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| 74 | hlt
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| 75 | jmp .whatever
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| 76 |
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| 77 | .s_szShutdown:
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| 78 | db 'Shutdown', 0
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| 79 |
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