98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/* $NetBSD: xxboot.h,v 1.4 1996/12/28 23:37:53 leo Exp $ */
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/*
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* Copyright (c) 1995 Waldi Ravens
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* All rights reserved.
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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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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Waldi Ravens.
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* 4. 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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#define BIOS 13
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#define Bconin 0x02
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#define Bconout 0x03
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#define Kbshift 0x0b
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#define XBIOS 14
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#define Floprd 0x08
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#define DMAread 0x2a
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#define _membot 0x0432
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#define _memtop 0x0436
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#define flock 0x043e
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#define _bootdev 0x0446
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#define _v_bas_ad 0x044e
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#define _hz_200 0x04ba
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#define _drvbits 0x04c2
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#define _sysbase 0x04f2
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#define pun_ptr 0x0516
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#define daccess 0x8604
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#define dmodus 0x8606
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#define dmahi 0x8609
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#define gpip 0xfa01
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#define rtcrnr 0x8961
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#define rtcdat 0x8963
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#define BOOTPREF 15
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#define idesdh 0xfff00019
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#define idedor 0xfff00005
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#define idedr 0xfff00000
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#define idecr 0xfff0001d
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#define idesr 0xfff0001d
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#define idesc 0xfff00009
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#define idesn 0xfff0000d
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#define idecl 0xfff00011
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#define idech 0xfff00015
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/*
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* Boot block format (16 * 512 bytes)
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*
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* - first-stage loader : 512 bytes
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* - magic number : 4 bytes
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* - disk pack label : 1020 bytes
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* - second-stage loader: 6656 bytes
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*
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* The boot code in ROM loads the first-stage loader, which
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* in turn loads the remaining 15 sectors and executes the
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* second-stage loader, which runs at address LOADADDR.
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*/
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#define NSEC 15
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#define LBLSZ 1020
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#define BXXSZ 6656
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#define BXXST (LOADADDR)
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#define LBLST (BXXST-LBLSZ)
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/*
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* Miminum/maximum value for the top/bottom of the memory area
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* provided by the BIOS. The 1MB minimum memory limit is enough
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* to load a NetBSD kernel, not to run it. ;-) However, memory
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* reserved by the BIOS is not available to the boot loaders,
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* but will be claimed by the NetBSD kernel.
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*/
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#define MAXBOT (LBLST-4)
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#define MINTOP (MAXBOT+0x100000)
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