109 lines
2.4 KiB
ArmAsm
109 lines
2.4 KiB
ArmAsm
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# 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 Unpublished rights reserved under the copyright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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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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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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.globl start
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.code16
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start:
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jmp main
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.org 4
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.ascii "IPL1"
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.byte 0, 0, 0
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.globl start
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main:
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xor %ax, %ax
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mov %ax, %ds
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mov (0x584), %al # DA/UA
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mov %al, %ah
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and $0xf0, %ah
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cmp $0x90, %ah
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je fdd
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# hdd
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mov $6, %ah
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mov $0x3000, %bx
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mov %bx, %es
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mov $0x2000, %bx
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xor %cx, %cx
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xor %dx, %dx
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xor %bp, %bp
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int $0x1b
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jc error_hdd
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push %ax
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mov %es, %ax
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add $0x40, %ax
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mov %ax, %es
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pop %ax
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push %es
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push %bp
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lret
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# fdd
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fdd:
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xor %di, %di
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fdd_retry:
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mov $0xd6, %ah
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mov $0x3000, %bx
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mov %bx, %es
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mov $0x2000, %bx
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mov $0x0200, %cx
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mov $0x0001, %dx
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xor %bp, %bp
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int $0x1b
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jc error
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push %ax
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mov %es, %ax
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add $0x40, %ax
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mov %ax, %es
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pop %ax
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push %es
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push %bp
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lret
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error:
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or %di, %di
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jnz error_hdd
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and $0x0f, %al
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or $0x30, %al
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jmp fdd_retry
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error_hdd:
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jmp error
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.org 0x1fa
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.byte 0 # defflag_off
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.byte 0 # defpart_off
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.byte 1 # menu version
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.byte 0
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.word 0xaa55
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