| 1 | ; $Id: DosVmOff.asm 93115 2022-01-01 11:31:46Z 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) 2018-2022 Oracle Corporation
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| 10 | ;
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| 11 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 12 | ; available from http://www.virtualbox.org. This file is free software;
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| 13 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 14 | ; General Public License (GPL) as published by the Free Software
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| 15 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 16 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 17 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 18 | ;
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| 19 | ; The contents of this file may alternatively be used under the terms
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| 20 | ; of the Common Development and Distribution License Version 1.0
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| 21 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 22 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 23 | ; CDDL are applicable instead of those of the GPL.
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| 24 | ;
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| 25 | ; You may elect to license modified versions of this file under the
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| 26 | ; terms and conditions of either the GPL or the CDDL or both.
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| 27 | ;
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| 28 |
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| 29 |
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| 30 |
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| 31 | %include "VBox/bios.mac"
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| 32 |
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| 33 | org 100h
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| 34 |
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| 35 | segment text
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| 36 | main:
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| 37 | %if 0
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| 38 | ; Setup stack.
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| 39 | mov ax, stack
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| 40 | mov ss, ax
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| 41 | mov sp, top_of_stack
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| 42 | %endif
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| 43 |
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| 44 | ; Do the shutdown thing.
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| 45 | mov ax, cs
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| 46 | mov ds, ax
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| 47 |
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| 48 | mov bl, 64
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| 49 | mov dx, VBOX_BIOS_SHUTDOWN_PORT
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| 50 | mov ax, VBOX_BIOS_OLD_SHUTDOWN_PORT
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| 51 | .retry:
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| 52 | mov cx, 8
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| 53 | mov si, .s_szShutdown
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| 54 | rep outsb
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| 55 | xchg ax, dx ; alternate between the new (VBox) and old (Bochs) ports.
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| 56 | dec bl
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| 57 | jnz .retry
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| 58 |
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| 59 |
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| 60 | ; Probably not a VBox VM, exit the program with errorlevel 1.
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| 61 | .whatever:
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| 62 | mov ax, 04c01h
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| 63 | int 021h
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| 64 | hlt
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| 65 | jmp .whatever
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| 66 |
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| 67 | .s_szShutdown:
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| 68 | db 'Shutdown', 0
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| 69 |
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