1 /*
2 ** -----------------------------------------------------------------------------
3 **
4 ** Perle Specialix driver for Linux
5 ** Ported from existing RIO Driver for SCO sources.
6 *
7 * (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 **
23 ** Module : riscos.h
24 ** SID : 1.2
25 ** Last Modified : 11/6/98 11:34:19
26 ** Retrieved : 11/6/98 11:34:22
27 **
28 ** ident @(#)riscos.h 1.2
29 **
30 ** -----------------------------------------------------------------------------
31 */
32
33 #ifndef __rio_riscos_h__
34 #define __rio_riscos_h__
35
36 #ifdef SCCS_LABELS
37 static char *_riscos_h_sccs_ = "@(#)riscos.h 1.2";
38 #endif
39
40 /*
41 ** This module used to define all those little itsy bits required for RISC/OS
42 ** now it's full of null macros.
43 */
44
45 /*
46 ** RBYTE reads a byte from a location.
47 ** RWORD reads a word from a location.
48 ** WBYTE writes a byte to a location.
49 ** WWORD writes a word to a location.
50 ** RINDW reads a word through a pointer.
51 ** WINDW writes a word through a pointer.
52 ** RIOSWAB swaps the two bytes of a word, if needed.
53 */
54
55 #define RIOSWAB(N) (N)
56 #define WBYTE(A,V) (A)=(uchar)(V)
57 #define WWORD(A,V) (A)=(ushort)(V)
58 #define RBYTE(A) (uchar)(A)
59 #define RWORD(A) (ushort)(A)
60 #define RINDW(A) (*(ushort *)(A))
61 #define WINDW(A,V) (*(ushort *)(A)=(ushort)(V))
62
63 #endif /* __rio_riscos_h__ */
64
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