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Add Mindscape Music Board emulation based on Ayumi. (#295)
This commit is contained in:
Benedikt Freisen
GitHub
@@ -27,6 +27,9 @@
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- Matrox Millennium
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- Quadram Quadcolor I / I+II
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## Added the following Sound Cards to v18
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- Mindscape Music Board
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## Developer Changes to v18
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- First release to switch from autotools/make to CMake/Ninja
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- Legacy autotools and mingw makefiles are removed
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26
NOTICE
26
NOTICE
@@ -18,6 +18,30 @@ nick_without_<> @ users.sourceforge.net
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Licensed under the GNU General Public License 2.0
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Ayumi
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=====
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Copyright (c) Peter Sovietov, http://sovietov.com
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Licensed under the MIT License
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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reSID
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=====
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Authors of reSID.
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@@ -106,4 +130,4 @@ The Australian National University.
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RSA Data Security, Inc.
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Please read the top of each source file for the details on the various
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copyrights.
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copyrights.
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71
includes/private/sound/ayumi/ayumi.h
Normal file
71
includes/private/sound/ayumi/ayumi.h
Normal file
@@ -0,0 +1,71 @@
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/* Author: Peter Sovietov */
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#ifndef AYUMI_H
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#define AYUMI_H
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enum {
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TONE_CHANNELS = 3,
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DECIMATE_FACTOR = 8,
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FIR_SIZE = 192,
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DC_FILTER_SIZE = 1024
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};
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struct tone_channel {
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int tone_period;
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int tone_counter;
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int tone;
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int t_off;
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int n_off;
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int e_on;
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int volume;
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double pan_left;
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double pan_right;
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};
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struct interpolator {
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double c[4];
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double y[4];
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};
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struct dc_filter {
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double sum;
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double delay[DC_FILTER_SIZE];
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};
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struct ayumi {
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struct tone_channel channels[TONE_CHANNELS];
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int noise_period;
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int noise_counter;
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int noise;
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int envelope_counter;
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int envelope_period;
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int envelope_shape;
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int envelope_segment;
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int envelope;
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const double* dac_table;
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double step;
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double x;
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struct interpolator interpolator_left;
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struct interpolator interpolator_right;
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double fir_left[FIR_SIZE * 2];
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double fir_right[FIR_SIZE * 2];
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int fir_index;
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struct dc_filter dc_left;
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struct dc_filter dc_right;
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int dc_index;
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double left;
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double right;
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};
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int ayumi_configure(struct ayumi* ay, int is_ym, double clock_rate, int sr);
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void ayumi_set_pan(struct ayumi* ay, int index, double pan, int is_eqp);
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void ayumi_set_tone(struct ayumi* ay, int index, int period);
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void ayumi_set_noise(struct ayumi* ay, int period);
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void ayumi_set_mixer(struct ayumi* ay, int index, int t_off, int n_off, int e_on);
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void ayumi_set_volume(struct ayumi* ay, int index, int volume);
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void ayumi_set_envelope(struct ayumi* ay, int period);
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void ayumi_set_envelope_shape(struct ayumi* ay, int shape);
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void ayumi_process(struct ayumi* ay);
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void ayumi_remove_dc(struct ayumi* ay);
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#endif
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24
includes/private/sound/sound_mmb.h
Normal file
24
includes/private/sound/sound_mmb.h
Normal file
@@ -0,0 +1,24 @@
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#ifndef _SOUND_MMB_H_
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#define _SOUND_MMB_H_
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#include "sound.h"
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#include "ayumi/ayumi.h"
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extern device_t mmb_device;
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typedef struct ay_3_891x_t {
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uint8_t index;
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uint8_t regs[16];
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struct ayumi chip;
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} ay_3_891x_t;
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typedef struct mmb_t {
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ay_3_891x_t first;
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ay_3_891x_t second;
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int16_t buffer[MAXSOUNDBUFLEN * 2];
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int pos;
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} mmb_t;
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void mmb_init(mmb_t *mmb, uint16_t base, uint16_t size, int freq);
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#endif /* _SOUND_MMB_H_ */
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338
src/sound/ayumi/ayumi.c
Normal file
338
src/sound/ayumi/ayumi.c
Normal file
@@ -0,0 +1,338 @@
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/* Author: Peter Sovietov */
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#include <string.h>
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#include <math.h>
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#include "ayumi/ayumi.h"
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static const double AY_dac_table[] = {
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0.0, 0.0,
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0.00999465934234, 0.00999465934234,
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0.0144502937362, 0.0144502937362,
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0.0210574502174, 0.0210574502174,
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0.0307011520562, 0.0307011520562,
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0.0455481803616, 0.0455481803616,
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0.0644998855573, 0.0644998855573,
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0.107362478065, 0.107362478065,
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0.126588845655, 0.126588845655,
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0.20498970016, 0.20498970016,
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0.292210269322, 0.292210269322,
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0.372838941024, 0.372838941024,
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0.492530708782, 0.492530708782,
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0.635324635691, 0.635324635691,
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0.805584802014, 0.805584802014,
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1.0, 1.0
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};
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static const double YM_dac_table[] = {
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0.0, 0.0,
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0.00465400167849, 0.00772106507973,
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0.0109559777218, 0.0139620050355,
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0.0169985503929, 0.0200198367285,
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0.024368657969, 0.029694056611,
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0.0350652323186, 0.0403906309606,
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0.0485389486534, 0.0583352407111,
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0.0680552376593, 0.0777752346075,
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0.0925154497597, 0.111085679408,
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0.129747463188, 0.148485542077,
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0.17666895552, 0.211551079576,
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0.246387426566, 0.281101701381,
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0.333730067903, 0.400427252613,
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0.467383840696, 0.53443198291,
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0.635172045472, 0.75800717174,
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0.879926756695, 1.0
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};
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static void reset_segment(struct ayumi* ay);
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static int update_tone(struct ayumi* ay, int index) {
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struct tone_channel* ch = &ay->channels[index];
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ch->tone_counter += 1;
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if (ch->tone_counter >= ch->tone_period) {
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ch->tone_counter = 0;
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ch->tone ^= 1;
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}
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return ch->tone;
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}
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static int update_noise(struct ayumi* ay) {
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int bit0x3;
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ay->noise_counter += 1;
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if (ay->noise_counter >= (ay->noise_period << 1)) {
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ay->noise_counter = 0;
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bit0x3 = ((ay->noise ^ (ay->noise >> 3)) & 1);
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ay->noise = (ay->noise >> 1) | (bit0x3 << 16);
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}
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return ay->noise & 1;
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}
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static void slide_up(struct ayumi* ay) {
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ay->envelope += 1;
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if (ay->envelope > 31) {
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ay->envelope_segment ^= 1;
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reset_segment(ay);
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}
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}
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static void slide_down(struct ayumi* ay) {
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ay->envelope -= 1;
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if (ay->envelope < 0) {
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ay->envelope_segment ^= 1;
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reset_segment(ay);
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}
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}
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static void hold_top(struct ayumi* ay) {
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(void) ay;
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}
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static void hold_bottom(struct ayumi* ay) {
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(void) ay;
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}
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static void (* const Envelopes[][2])(struct ayumi*) = {
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{slide_down, hold_bottom},
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{slide_down, hold_bottom},
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{slide_down, hold_bottom},
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{slide_down, hold_bottom},
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{slide_up, hold_bottom},
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{slide_up, hold_bottom},
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{slide_up, hold_bottom},
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{slide_up, hold_bottom},
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{slide_down, slide_down},
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{slide_down, hold_bottom},
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{slide_down, slide_up},
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{slide_down, hold_top},
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{slide_up, slide_up},
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{slide_up, hold_top},
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{slide_up, slide_down},
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{slide_up, hold_bottom}
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};
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static void reset_segment(struct ayumi* ay) {
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if (Envelopes[ay->envelope_shape][ay->envelope_segment] == slide_down
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|| Envelopes[ay->envelope_shape][ay->envelope_segment] == hold_top) {
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ay->envelope = 31;
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return;
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}
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ay->envelope = 0;
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}
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int update_envelope(struct ayumi* ay) {
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ay->envelope_counter += 1;
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if (ay->envelope_counter >= ay->envelope_period) {
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ay->envelope_counter = 0;
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Envelopes[ay->envelope_shape][ay->envelope_segment](ay);
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}
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return ay->envelope;
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}
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static void update_mixer(struct ayumi* ay) {
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int i;
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int out;
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int noise = update_noise(ay);
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int envelope = update_envelope(ay);
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ay->left = 0;
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ay->right = 0;
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for (i = 0; i < TONE_CHANNELS; i += 1) {
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out = (update_tone(ay, i) | ay->channels[i].t_off) & (noise | ay->channels[i].n_off);
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out *= ay->channels[i].e_on ? envelope : ay->channels[i].volume * 2 + 1;
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ay->left += ay->dac_table[out] * ay->channels[i].pan_left;
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ay->right += ay->dac_table[out] * ay->channels[i].pan_right;
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}
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}
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int ayumi_configure(struct ayumi* ay, int is_ym, double clock_rate, int sr) {
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int i;
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memset(ay, 0, sizeof(struct ayumi));
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ay->step = clock_rate / (sr * 8 * DECIMATE_FACTOR);
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ay->dac_table = is_ym ? YM_dac_table : AY_dac_table;
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ay->noise = 1;
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ayumi_set_envelope(ay, 1);
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for (i = 0; i < TONE_CHANNELS; i += 1) {
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ayumi_set_tone(ay, i, 1);
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}
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return ay->step < 1;
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}
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void ayumi_set_pan(struct ayumi* ay, int index, double pan, int is_eqp) {
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if (is_eqp) {
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ay->channels[index].pan_left = sqrt(1 - pan);
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ay->channels[index].pan_right = sqrt(pan);
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} else {
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ay->channels[index].pan_left = 1 - pan;
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ay->channels[index].pan_right = pan;
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}
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}
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void ayumi_set_tone(struct ayumi* ay, int index, int period) {
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period &= 0xfff;
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ay->channels[index].tone_period = (period == 0) | period;
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}
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void ayumi_set_noise(struct ayumi* ay, int period) {
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period &= 0x1f;
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ay->noise_period = (period == 0) | period;
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}
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void ayumi_set_mixer(struct ayumi* ay, int index, int t_off, int n_off, int e_on) {
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ay->channels[index].t_off = t_off & 1;
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ay->channels[index].n_off = n_off & 1;
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ay->channels[index].e_on = e_on;
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}
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void ayumi_set_volume(struct ayumi* ay, int index, int volume) {
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ay->channels[index].volume = volume & 0xf;
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}
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void ayumi_set_envelope(struct ayumi* ay, int period) {
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period &= 0xffff;
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ay->envelope_period = (period == 0) | period;
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}
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void ayumi_set_envelope_shape(struct ayumi* ay, int shape) {
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ay->envelope_shape = shape & 0xf;
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ay->envelope_counter = 0;
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ay->envelope_segment = 0;
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reset_segment(ay);
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}
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static double decimate(double* x) {
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double y = -0.0000046183113992051936 * (x[1] + x[191]) +
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-0.00001117761640887225 * (x[2] + x[190]) +
|
||||
-0.000018610264502005432 * (x[3] + x[189]) +
|
||||
-0.000025134586135631012 * (x[4] + x[188]) +
|
||||
-0.000028494281690666197 * (x[5] + x[187]) +
|
||||
-0.000026396828793275159 * (x[6] + x[186]) +
|
||||
-0.000017094212558802156 * (x[7] + x[185]) +
|
||||
0.000023798193576966866 * (x[9] + x[183]) +
|
||||
0.000051281160242202183 * (x[10] + x[182]) +
|
||||
0.00007762197826243427 * (x[11] + x[181]) +
|
||||
0.000096759426664120416 * (x[12] + x[180]) +
|
||||
0.00010240229300393402 * (x[13] + x[179]) +
|
||||
0.000089344614218077106 * (x[14] + x[178]) +
|
||||
0.000054875700118949183 * (x[15] + x[177]) +
|
||||
-0.000069839082210680165 * (x[17] + x[175]) +
|
||||
-0.0001447966132360757 * (x[18] + x[174]) +
|
||||
-0.00021158452917708308 * (x[19] + x[173]) +
|
||||
-0.00025535069106550544 * (x[20] + x[172]) +
|
||||
-0.00026228714374322104 * (x[21] + x[171]) +
|
||||
-0.00022258805927027799 * (x[22] + x[170]) +
|
||||
-0.00013323230495695704 * (x[23] + x[169]) +
|
||||
0.00016182578767055206 * (x[25] + x[167]) +
|
||||
0.00032846175385096581 * (x[26] + x[166]) +
|
||||
0.00047045611576184863 * (x[27] + x[165]) +
|
||||
0.00055713851457530944 * (x[28] + x[164]) +
|
||||
0.00056212565121518726 * (x[29] + x[163]) +
|
||||
0.00046901918553962478 * (x[30] + x[162]) +
|
||||
0.00027624866838952986 * (x[31] + x[161]) +
|
||||
-0.00032564179486838622 * (x[33] + x[159]) +
|
||||
-0.00065182310286710388 * (x[34] + x[158]) +
|
||||
-0.00092127787309319298 * (x[35] + x[157]) +
|
||||
-0.0010772534348943575 * (x[36] + x[156]) +
|
||||
-0.0010737727700273478 * (x[37] + x[155]) +
|
||||
-0.00088556645390392634 * (x[38] + x[154]) +
|
||||
-0.00051581896090765534 * (x[39] + x[153]) +
|
||||
0.00059548767193795277 * (x[41] + x[151]) +
|
||||
0.0011803558710661009 * (x[42] + x[150]) +
|
||||
0.0016527320270369871 * (x[43] + x[149]) +
|
||||
0.0019152679330965555 * (x[44] + x[148]) +
|
||||
0.0018927324805381538 * (x[45] + x[147]) +
|
||||
0.0015481870327877937 * (x[46] + x[146]) +
|
||||
0.00089470695834941306 * (x[47] + x[145]) +
|
||||
-0.0010178225878206125 * (x[49] + x[143]) +
|
||||
-0.0020037400552054292 * (x[50] + x[142]) +
|
||||
-0.0027874356824117317 * (x[51] + x[141]) +
|
||||
-0.003210329988021943 * (x[52] + x[140]) +
|
||||
-0.0031540624117984395 * (x[53] + x[139]) +
|
||||
-0.0025657163651900345 * (x[54] + x[138]) +
|
||||
-0.0014750752642111449 * (x[55] + x[137]) +
|
||||
0.0016624165446378462 * (x[57] + x[135]) +
|
||||
0.0032591192839069179 * (x[58] + x[134]) +
|
||||
0.0045165685815867747 * (x[59] + x[133]) +
|
||||
0.0051838984346123896 * (x[60] + x[132]) +
|
||||
0.0050774264697459933 * (x[61] + x[131]) +
|
||||
0.0041192521414141585 * (x[62] + x[130]) +
|
||||
0.0023628575417966491 * (x[63] + x[129]) +
|
||||
-0.0026543507866759182 * (x[65] + x[127]) +
|
||||
-0.0051990251084333425 * (x[66] + x[126]) +
|
||||
-0.0072020238234656924 * (x[67] + x[125]) +
|
||||
-0.0082672928192007358 * (x[68] + x[124]) +
|
||||
-0.0081033739572956287 * (x[69] + x[123]) +
|
||||
-0.006583111539570221 * (x[70] + x[122]) +
|
||||
-0.0037839040415292386 * (x[71] + x[121]) +
|
||||
0.0042781252851152507 * (x[73] + x[119]) +
|
||||
0.0084176358598320178 * (x[74] + x[118]) +
|
||||
0.01172566057463055 * (x[75] + x[117]) +
|
||||
0.013550476647788672 * (x[76] + x[116]) +
|
||||
0.013388189369997496 * (x[77] + x[115]) +
|
||||
0.010979501242341259 * (x[78] + x[114]) +
|
||||
0.006381274941685413 * (x[79] + x[113]) +
|
||||
-0.007421229604153888 * (x[81] + x[111]) +
|
||||
-0.01486456304340213 * (x[82] + x[110]) +
|
||||
-0.021143584622178104 * (x[83] + x[109]) +
|
||||
-0.02504275058758609 * (x[84] + x[108]) +
|
||||
-0.025473530942547201 * (x[85] + x[107]) +
|
||||
-0.021627310017882196 * (x[86] + x[106]) +
|
||||
-0.013104323383225543 * (x[87] + x[105]) +
|
||||
0.017065133989980476 * (x[89] + x[103]) +
|
||||
0.036978919264451952 * (x[90] + x[102]) +
|
||||
0.05823318062093958 * (x[91] + x[101]) +
|
||||
0.079072012081405949 * (x[92] + x[100]) +
|
||||
0.097675998716952317 * (x[93] + x[99]) +
|
||||
0.11236045936950932 * (x[94] + x[98]) +
|
||||
0.12176343577287731 * (x[95] + x[97]) +
|
||||
0.125 * x[96];
|
||||
memcpy(&x[FIR_SIZE - DECIMATE_FACTOR], x, DECIMATE_FACTOR * sizeof(double));
|
||||
return y;
|
||||
}
|
||||
|
||||
void ayumi_process(struct ayumi* ay) {
|
||||
int i;
|
||||
double y1;
|
||||
double* c_left = ay->interpolator_left.c;
|
||||
double* y_left = ay->interpolator_left.y;
|
||||
double* c_right = ay->interpolator_right.c;
|
||||
double* y_right = ay->interpolator_right.y;
|
||||
double* fir_left = &ay->fir_left[FIR_SIZE - ay->fir_index * DECIMATE_FACTOR];
|
||||
double* fir_right = &ay->fir_right[FIR_SIZE - ay->fir_index * DECIMATE_FACTOR];
|
||||
ay->fir_index = (ay->fir_index + 1) % (FIR_SIZE / DECIMATE_FACTOR - 1);
|
||||
for (i = DECIMATE_FACTOR - 1; i >= 0; i -= 1) {
|
||||
ay->x += ay->step;
|
||||
if (ay->x >= 1) {
|
||||
ay->x -= 1;
|
||||
y_left[0] = y_left[1];
|
||||
y_left[1] = y_left[2];
|
||||
y_left[2] = y_left[3];
|
||||
y_right[0] = y_right[1];
|
||||
y_right[1] = y_right[2];
|
||||
y_right[2] = y_right[3];
|
||||
update_mixer(ay);
|
||||
y_left[3] = ay->left;
|
||||
y_right[3] = ay->right;
|
||||
y1 = y_left[2] - y_left[0];
|
||||
c_left[0] = 0.5 * y_left[1] + 0.25 * (y_left[0] + y_left[2]);
|
||||
c_left[1] = 0.5 * y1;
|
||||
c_left[2] = 0.25 * (y_left[3] - y_left[1] - y1);
|
||||
y1 = y_right[2] - y_right[0];
|
||||
c_right[0] = 0.5 * y_right[1] + 0.25 * (y_right[0] + y_right[2]);
|
||||
c_right[1] = 0.5 * y1;
|
||||
c_right[2] = 0.25 * (y_right[3] - y_right[1] - y1);
|
||||
}
|
||||
fir_left[i] = (c_left[2] * ay->x + c_left[1]) * ay->x + c_left[0];
|
||||
fir_right[i] = (c_right[2] * ay->x + c_right[1]) * ay->x + c_right[0];
|
||||
}
|
||||
ay->left = decimate(fir_left);
|
||||
ay->right = decimate(fir_right);
|
||||
}
|
||||
|
||||
static double dc_filter(struct dc_filter* dc, int index, double x) {
|
||||
dc->sum += -dc->delay[index] + x;
|
||||
dc->delay[index] = x;
|
||||
return x - dc->sum / DC_FILTER_SIZE;
|
||||
}
|
||||
|
||||
void ayumi_remove_dc(struct ayumi* ay) {
|
||||
ay->left = dc_filter(&ay->dc_left, ay->dc_index, ay->left);
|
||||
ay->right = dc_filter(&ay->dc_right, ay->dc_index, ay->right);
|
||||
ay->dc_index = (ay->dc_index + 1) & (DC_FILTER_SIZE - 1);
|
||||
}
|
||||
@@ -20,6 +20,7 @@
|
||||
#include "sound_sb.h"
|
||||
#include "sound_sb_dsp.h"
|
||||
#include "sound_wss.h"
|
||||
#include "sound_mmb.h"
|
||||
|
||||
#include "timer.h"
|
||||
#include "thread.h"
|
||||
@@ -50,6 +51,7 @@ SOUND_CARD sc_azt1605 = {"Aztech Sound Galaxy Nova 16 Extra (Clinton)", "azt1605
|
||||
SOUND_CARD sc_pas16 = {"Pro Audio Spectrum 16", "pas16", &pas16_device};
|
||||
SOUND_CARD sc_es1371 = {"Ensoniq AudioPCI (ES1371)", "es1371", &es1371_device};
|
||||
SOUND_CARD sc_sbpci128 = {"Sound Blaster PCI 128", "sbpci128", &es1371_device};
|
||||
SOUND_CARD sc_mmb = {"Mindscape Music Board", "mmb", &mmb_device};
|
||||
|
||||
int sound_card_available(int card) {
|
||||
if (sound_cards[card] != NULL && sound_cards[card]->device != NULL)
|
||||
@@ -284,4 +286,5 @@ void sound_init_builtin() {
|
||||
pcem_add_sound(&sc_pas16);
|
||||
pcem_add_sound(&sc_es1371);
|
||||
pcem_add_sound(&sc_sbpci128);
|
||||
pcem_add_sound(&sc_mmb);
|
||||
}
|
||||
|
||||
@@ -1,4 +1,5 @@
|
||||
set(PCEM_PRIVATE_API ${PCEM_PRIVATE_API}
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/ayumi/ayumi.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/resid-fp/envelope.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/resid-fp/extfilt.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/resid-fp/filter.h
|
||||
@@ -17,6 +18,7 @@ set(PCEM_PRIVATE_API ${PCEM_PRIVATE_API}
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/sound_emu8k.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/sound_gus.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/sound.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/sound_mmb.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/sound_mpu401_uart.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/sound_opl.h
|
||||
${CMAKE_SOURCE_DIR}/includes/private/sound/sound_pas16.h
|
||||
@@ -43,6 +45,7 @@ set(PCEM_SRC ${PCEM_SRC}
|
||||
sound/sound_dbopl.cc
|
||||
sound/sound_emu8k.c
|
||||
sound/sound_gus.c
|
||||
sound/sound_mmb.c
|
||||
sound/sound_mpu401_uart.c
|
||||
sound/sound_opl.c
|
||||
sound/sound_pas16.c
|
||||
@@ -59,6 +62,11 @@ set(PCEM_SRC ${PCEM_SRC}
|
||||
sound/soundopenal.c
|
||||
)
|
||||
|
||||
# AYUMI
|
||||
set(PCEM_SRC ${PCEM_SRC}
|
||||
sound/ayumi/ayumi.c
|
||||
)
|
||||
|
||||
# RESID-FP
|
||||
set(PCEM_SRC ${PCEM_SRC}
|
||||
sound/resid-fp/convolve.cc
|
||||
@@ -89,4 +97,4 @@ else()
|
||||
set(PCEM_SRC ${PCEM_SRC}
|
||||
sound/sdl2-midi.c
|
||||
)
|
||||
endif()
|
||||
endif()
|
||||
|
||||
237
src/sound/sound_mmb.c
Normal file
237
src/sound/sound_mmb.c
Normal file
@@ -0,0 +1,237 @@
|
||||
#include <stdlib.h>
|
||||
#include "ibm.h"
|
||||
#include "device.h"
|
||||
#include "io.h"
|
||||
#include "sound.h"
|
||||
#include "sound_mmb.h"
|
||||
#include "cpu.h"
|
||||
|
||||
void mmb_update(mmb_t *mmb) {
|
||||
for (; mmb->pos < sound_pos_global; mmb->pos++) {
|
||||
ayumi_process(&mmb->first.chip);
|
||||
ayumi_process(&mmb->second.chip);
|
||||
|
||||
ayumi_remove_dc(&mmb->first.chip);
|
||||
ayumi_remove_dc(&mmb->second.chip);
|
||||
|
||||
mmb->buffer[mmb->pos << 1] = (mmb->first.chip.left + mmb->second.chip.left) * 16000;
|
||||
mmb->buffer[(mmb->pos << 1) + 1] = (mmb->first.chip.right + mmb->second.chip.right) * 16000;
|
||||
}
|
||||
}
|
||||
|
||||
void mmb_get_buffer(int32_t *buffer, int len, void *p) {
|
||||
mmb_t *mmb = (mmb_t *)p;
|
||||
|
||||
int c;
|
||||
|
||||
mmb_update(mmb);
|
||||
|
||||
for (c = 0; c < len * 2 ; c++)
|
||||
buffer[c] += mmb->buffer[c];
|
||||
|
||||
mmb->pos = 0;
|
||||
}
|
||||
|
||||
void mmb_write(uint16_t addr, uint8_t data, void *p) {
|
||||
mmb_t *mmb = (mmb_t *)p;
|
||||
int freq;
|
||||
|
||||
mmb_update(mmb);
|
||||
|
||||
switch (addr & 3) {
|
||||
case 0:
|
||||
mmb->first.index = data;
|
||||
break;
|
||||
case 2:
|
||||
mmb->second.index = data;
|
||||
break;
|
||||
case 1:
|
||||
case 3: {
|
||||
ay_3_891x_t *ay = ((addr & 2) == 0) ? &mmb->first : &mmb->second;
|
||||
|
||||
switch (ay->index) {
|
||||
case 0:
|
||||
ay->regs[0] = data;
|
||||
ayumi_set_tone(&ay->chip, 0, (ay->regs[1] << 8) | ay->regs[0]);
|
||||
break;
|
||||
case 1:
|
||||
ay->regs[1] = data & 0xf;
|
||||
ayumi_set_tone(&ay->chip, 0, (ay->regs[1] << 8) | ay->regs[0]);
|
||||
break;
|
||||
case 2:
|
||||
ay->regs[2] = data;
|
||||
ayumi_set_tone(&ay->chip, 1, (ay->regs[3] << 8) | ay->regs[2]);
|
||||
break;
|
||||
case 3:
|
||||
ay->regs[3] = data & 0xf;
|
||||
ayumi_set_tone(&ay->chip, 1, (ay->regs[3] << 8) | ay->regs[2]);
|
||||
break;
|
||||
case 4:
|
||||
ay->regs[4] = data;
|
||||
ayumi_set_tone(&ay->chip, 2, (ay->regs[5] << 8) | ay->regs[4]);
|
||||
break;
|
||||
case 5:
|
||||
ay->regs[5] = data & 0xf;
|
||||
ayumi_set_tone(&ay->chip, 2, (ay->regs[5] << 8) | ay->regs[4]);
|
||||
break;
|
||||
case 6:
|
||||
ay->regs[6] = data & 0x1f;
|
||||
ayumi_set_noise(&ay->chip, ay->regs[6]);
|
||||
break;
|
||||
case 7:
|
||||
ay->regs[7] = data;
|
||||
ayumi_set_mixer(&ay->chip, 0, data & 1, (data >> 3) & 1, (ay->regs[8] >> 4) & 1);
|
||||
ayumi_set_mixer(&ay->chip, 1, (data >> 1) & 1, (data >> 4) & 1, (ay->regs[9] >> 4) & 1);
|
||||
ayumi_set_mixer(&ay->chip, 2, (data >> 2) & 1, (data >> 5) & 1, (ay->regs[10] >> 4) & 1);
|
||||
break;
|
||||
case 8:
|
||||
ay->regs[8] = data;
|
||||
ayumi_set_volume(&ay->chip, 0, data & 0xf);
|
||||
ayumi_set_mixer(&ay->chip, 0, ay->regs[7] & 1, (ay->regs[7] >> 3) & 1, (data >> 4) & 1);
|
||||
break;
|
||||
case 9:
|
||||
ay->regs[9] = data;
|
||||
ayumi_set_volume(&ay->chip, 1, data & 0xf);
|
||||
ayumi_set_mixer(&ay->chip, 1, (ay->regs[7] >> 1) & 1, (ay->regs[7] >> 4) & 1, (data >> 4) & 1);
|
||||
break;
|
||||
case 10:
|
||||
ay->regs[10] = data;
|
||||
ayumi_set_volume(&ay->chip, 2, data & 0xf);
|
||||
ayumi_set_mixer(&ay->chip, 2, (ay->regs[7] >> 2) & 1, (ay->regs[7] >> 5) & 1, (data >> 4) & 1);
|
||||
break;
|
||||
case 11:
|
||||
ay->regs[11] = data;
|
||||
ayumi_set_envelope(&ay->chip, (ay->regs[12] >> 8) | ay->regs[11]);
|
||||
break;
|
||||
case 12:
|
||||
ay->regs[12] = data;
|
||||
ayumi_set_envelope(&ay->chip, (ay->regs[12] >> 8) | ay->regs[11]);
|
||||
break;
|
||||
case 13:
|
||||
ay->regs[13] = data;
|
||||
ayumi_set_envelope_shape(&ay->chip, data & 0xf);
|
||||
break;
|
||||
case 14:
|
||||
ay->regs[14] = data;
|
||||
break;
|
||||
case 15:
|
||||
ay->regs[15] = data;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
uint8_t mmb_read(uint16_t addr, void *p) {
|
||||
mmb_t *mmb = (mmb_t *)p;
|
||||
ay_3_891x_t *ay = ((addr & 2) == 0) ? &mmb->first : &mmb->second;
|
||||
|
||||
switch (ay->index) {
|
||||
case 0:
|
||||
case 1:
|
||||
case 2:
|
||||
case 3:
|
||||
case 4:
|
||||
case 5:
|
||||
case 6:
|
||||
case 7:
|
||||
case 8:
|
||||
case 9:
|
||||
case 10:
|
||||
case 11:
|
||||
case 12:
|
||||
case 13:
|
||||
return ay->regs[ay->index];
|
||||
case 14:
|
||||
if (ay->regs[7] & 0x40)
|
||||
return ay->regs[14];
|
||||
else
|
||||
return 0;
|
||||
case 15:
|
||||
if (ay->regs[7] & 0x80)
|
||||
return ay->regs[15];
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
void mmb_init(mmb_t *mmb, uint16_t base, uint16_t size, int freq) {
|
||||
sound_add_handler(mmb_get_buffer, mmb);
|
||||
|
||||
ayumi_configure(&mmb->first.chip, 0, freq, 48000);
|
||||
ayumi_configure(&mmb->second.chip, 0, freq, 48000);
|
||||
|
||||
for (int i = 0; i < 3; i++) {
|
||||
ayumi_set_pan(&mmb->first.chip, i, 0.5, 1);
|
||||
ayumi_set_pan(&mmb->second.chip, i, 0.5, 1);
|
||||
}
|
||||
|
||||
io_sethandler(base, size, mmb_read, NULL, NULL, mmb_write, NULL, NULL, mmb);
|
||||
}
|
||||
|
||||
void *mmb_device_init() {
|
||||
mmb_t *mmb = malloc(sizeof(mmb_t));
|
||||
uint16_t base_addr = (device_get_config_int("addr96") << 6) | (device_get_config_int("addr52") << 2);
|
||||
memset(mmb, 0, sizeof(mmb_t));
|
||||
|
||||
/* NOTE:
|
||||
* The constant clock rate is a deviation from the real hardware which has
|
||||
* the design flaw that the clock rate is always half the ISA bus clock. */
|
||||
mmb_init(mmb, base_addr, 0x0004, 2386364);
|
||||
|
||||
return mmb;
|
||||
}
|
||||
|
||||
void mmb_device_close(void *p) {
|
||||
mmb_t *mmb = (mmb_t *)p;
|
||||
|
||||
free(mmb);
|
||||
}
|
||||
|
||||
static device_config_t mmb_config[] = {
|
||||
{.name = "addr96",
|
||||
.description = "Base address A9...A6",
|
||||
.type = CONFIG_SELECTION,
|
||||
.selection = {{.description = "0000", .value = 0},
|
||||
{.description = "0001", .value = 1},
|
||||
{.description = "0010", .value = 2},
|
||||
{.description = "0011", .value = 3},
|
||||
{.description = "0100", .value = 4},
|
||||
{.description = "0101", .value = 5},
|
||||
{.description = "0110", .value = 6},
|
||||
{.description = "0111", .value = 7},
|
||||
{.description = "1000", .value = 8},
|
||||
{.description = "1001", .value = 9},
|
||||
{.description = "1010", .value = 10},
|
||||
{.description = "1011", .value = 11},
|
||||
{.description = "1100", .value = 12},
|
||||
{.description = "1101", .value = 13},
|
||||
{.description = "1110", .value = 14},
|
||||
{.description = "1111", .value = 15},
|
||||
{.description = ""}},
|
||||
.default_int = 12},
|
||||
{.name = "addr52",
|
||||
.description = "Base address A5...A2",
|
||||
.type = CONFIG_SELECTION,
|
||||
.selection = {{.description = "0000", .value = 0},
|
||||
{.description = "0001", .value = 1},
|
||||
{.description = "0010", .value = 2},
|
||||
{.description = "0011", .value = 3},
|
||||
{.description = "0100", .value = 4},
|
||||
{.description = "0101", .value = 5},
|
||||
{.description = "0110", .value = 6},
|
||||
{.description = "0111", .value = 7},
|
||||
{.description = "1000", .value = 8},
|
||||
{.description = "1001", .value = 9},
|
||||
{.description = "1010", .value = 10},
|
||||
{.description = "1011", .value = 11},
|
||||
{.description = "1100", .value = 12},
|
||||
{.description = "1101", .value = 13},
|
||||
{.description = "1110", .value = 14},
|
||||
{.description = "1111", .value = 15},
|
||||
{.description = ""}},
|
||||
.default_int = 0},
|
||||
{.type = -1}};
|
||||
|
||||
device_t mmb_device = {"Mindscape Music Board", 0, mmb_device_init, mmb_device_close, NULL, NULL, NULL, NULL, mmb_config};
|
||||
Reference in New Issue
Block a user