lxdream 0.9.1| filename | src/aica/aica.c |
| changeset | 30:89b30313d757 |
| prev | 23:1ec3acd0594d |
| next | 35:21a4be098304 |
| author | nkeynes |
| date | Sun Dec 25 05:57:00 2005 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | Change timeslice to nanoseconds (was microseconds) Generize single step (now steps through active CPU) Add lots of header blocks |
| view | annotate | diff | log | raw |
1 /**
2 * $Id: aica.c,v 1.5 2005-12-25 05:57:00 nkeynes Exp $
3 *
4 * This is the core sound system (ie the bit which does the actual work)
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
19 #include "dream.h"
20 #include "modules.h"
21 #include "mem.h"
22 #include "aica.h"
23 #define MMIO_IMPL
24 #include "aica.h"
26 MMIO_REGION_READ_DEFFN( AICA0 )
27 MMIO_REGION_READ_DEFFN( AICA1 )
28 MMIO_REGION_READ_DEFFN( AICA2 )
30 void aica_init( void );
31 void aica_reset( void );
32 void aica_start( void );
33 void aica_stop( void );
34 uint32_t aica_run_slice( uint32_t );
37 struct dreamcast_module aica_module = { "AICA", aica_init, aica_reset,
38 aica_start, aica_run_slice, aica_stop,
39 NULL, NULL, NULL };
41 /**
42 * Initialize the AICA subsystem. Note requires that
43 */
44 void aica_init( void )
45 {
46 register_io_regions( mmio_list_spu );
47 MMIO_NOTRACE(AICA0);
48 MMIO_NOTRACE(AICA1);
49 arm_mem_init();
50 }
52 void aica_reset( void )
53 {
55 }
57 void aica_start( void )
58 {
60 }
62 uint32_t aica_run_slice( uint32_t nanosecs )
63 {
64 /* Run arm instructions */
65 /* Generate audio buffer */
66 }
68 void aica_stop( void )
69 {
71 }
73 /** Channel register structure:
74 * 00
75 * 04
76 * 08 4 Loop start address
77 * 0C 4 Loop end address
78 * 10 4 Volume envelope
79 * 14
80 * 18 4 Frequency (floating point
81 * 1C
82 * 20
83 * 24 1 Pan
84 * 25 1 ??
85 * 26
86 * 27
87 * 28 1 ??
88 * 29 1 Volume
89 * 2C
90 * 30
91 *
93 /* Write to channels 0-31 */
94 void mmio_region_AICA0_write( uint32_t reg, uint32_t val )
95 {
96 // aica_write_channel( reg >> 7, reg % 128, val );
98 }
100 /* Write to channels 32-64 */
101 void mmio_region_AICA1_write( uint32_t reg, uint32_t val )
102 {
103 // aica_write_channel( (reg >> 7) + 32, reg % 128, val );
105 }
107 /* General registers */
108 void mmio_region_AICA2_write( uint32_t reg, uint32_t val )
109 {
111 }
.