1/*	$NetBSD: biosrw.s,v 1.1 2002/02/24 20:51:07 leo Exp $	*/
2
3/*
4 * Copyright (c) 1995 Waldi Ravens.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *        This product includes software developed by Waldi Ravens.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/* int	bios_read(buffer, offset, count, dev)	*/
34
35	.globl	_bios_read
36	.text
37	.even
38
39_bios_read:
40	movml	d1-d2/a1-a2,sp@-
41	movl	sp@(24),sp@-		| offset
42	movw	sp@(38),sp@-		| device
43	movw	#-1,sp@-
44	movw	sp@(38),sp@-		| count
45	movl	sp@(30),sp@-		| buffer
46	movw	#8,sp@-			| read, physical mode
47	movw	#4,sp@-
48	trap	#13			| Rwabs()
49	lea	sp@(18),sp
50	movml	sp@+,d1-d2/a1-a2
51	rts
52
53/* int	bios_write(buffer, offset, count, dev)	*/
54
55	.globl	_bios_write
56	.text
57	.even
58
59_bios_write:
60	movml	d1-d2/a1-a2,sp@-
61	movl	sp@(20),sp@-		| offset
62	movw	sp@(34),sp@-		| device
63	movw	#-1,sp@-
64	movw	sp@(34),sp@-		| count
65	movl	sp@(26),sp@-		| buffer
66	movw	#9,sp@-			| write, physical mode
67	movw	#4,sp@-
68	trap	#13			| Rwabs()
69	lea	sp@(18),sp
70	movml	sp@+,d1-d2/a1-a2
71	rts
72
73/* int	bios_critic(error)			*/
74
75	.globl	_bios_critic
76	.text
77	.even
78
79_bios_critic:
80	movw	sp@(4),d0
81	extl	d0
82	rts
83