1/*        $NetBSD: consio.S,v 1.1 2001/09/08 11:21:02 thomas 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#include <machine/asm.h>
34
35ENTRY_NOPROFILE(getchar)      | int getchar (void);
36          movml     %d2/%a2,%sp@-
37          movw      #2,%sp@-  | BIOS device 2 => console (VT52)
38          movw      #2,%sp@-  | BIOS opcode 2 => Bconin
39          trap      #13                 | => char in d0.b
40          addql     #4,%sp
41          andl      #0xff,%d0
42          movml     %sp@+,%d2/%a2
43          rts
44
45ENTRY_NOPROFILE(putchar)      | void putchar (int c);
46          movl      %sp@(4),%d0
47          cmpw      #10,%d0             | linefeed?
48          bnes      0f
49          movq      #13,%d0             | yes, put CR and LF.
50          bsrs      0f
51          movq      #10,%d0
520:        movml     %d2/%a2,%sp@-
53          movw      %d0,%sp@- | character
54          movw      #2,%sp@-  | BIOS device 2 => console (VT52)
55          movw      #3,%sp@-  | BIOS opcode 3 => Bconout
56          trap      #13                 | => none
57          addql     #6,%sp
58          movml     %sp@+,%d2/%a2
59          rts
60