e9b13dd6ec
sector 0 of a disk and boot0.5 is the `boot selector' which starts from address 0x400. The IPL loads boot0.5 and boot0.5 loads bootblock of a slice. The boot manager stuff was developed by me (kato) with Borland C++, and then, translated into bcc in the ports collection by Nokubi-san. After that, boot0 has been translated into gas with the .code16 directive by Takahashi-san (nyan) and boot0.5 has been rewritten in gas by me.
59 lines
1.7 KiB
ArmAsm
59 lines
1.7 KiB
ArmAsm
# Copyright (c) KATO Takenori, 1999, 2000.
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#
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# All rights reserved. Unpublished rights reserved under the copyright
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# laws of Japan.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer as
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# the first lines of this file unmodified.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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.global start
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.code16
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.text
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start:
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cli
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movw %cs, %ax
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movw %ax, %ds
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movw %ss, iniss
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movw %sp, inisp
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movw %ax, %ss
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movw $0xfffe, %sp
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sti
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xorw %ax, %ax
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movw %ax, %es
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call main
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cli
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movw %cs:iniss, %ss
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movw %cs:inisp, %sp
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sti
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int $0x1e
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# NOTREACHED
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lret
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.data
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.global iniss, inisp
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iniss: .word 0
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inisp: .word 0
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