sys/arch/atari/stand/tostools/libtos/biosrw.s

   1 /*      $NetBSD: biosrw.s,v 1.1.1.1 1996/01/07 21:54:15 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