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Split out IBM PS/1 Audio Card from machine

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This commit is contained in:
Jasmine Iwanek
2022-01-08 20:15:56 -05:00
parent e40c664a9b
commit aaf535b404
5 changed files with 207 additions and 191 deletions
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3
src/include/86box/sound.h
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@@ -99,6 +99,9 @@ extern const device_t gus_device;
extern const device_t pas16_device;
#endif
/* IBM PS/1 Audio Card */
extern const device_t ps1snd_device;
/* Tandy PSSJ */
extern const device_t pssj_device;
extern const device_t pssj_isa_device;

192
src/machine/m_ps1.c
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@@ -60,26 +60,10 @@
#include <86box/fdd.h>
#include <86box/fdc.h>
#include <86box/port_6x.h>
#include <86box/sound.h>
#include <86box/snd_sn76489.h>
#include <86box/video.h>
#include <86box/machine.h>
typedef struct {
sn76489_t sn76489;
uint8_t status, ctrl;
uint64_t timer_latch;
pc_timer_t timer_count;
int timer_enable;
uint8_t fifo[2048];
int fifo_read_idx, fifo_write_idx;
int fifo_threshold;
uint8_t dac_val;
int16_t buffer[SOUNDBUFLEN];
int pos;
} ps1snd_t;
typedef struct {
int model;
@@ -100,178 +84,6 @@ typedef struct {
} ps1_t;
static void
update_irq_status(ps1snd_t *snd)
{
if (((snd->status & snd->ctrl) & 0x12) && (snd->ctrl & 0x01))
picint(1 << 7);
else
picintc(1 << 7);
}
static uint8_t
snd_read(uint16_t port, void *priv)
{
ps1snd_t *snd = (ps1snd_t *)priv;
uint8_t ret = 0xff;
switch (port & 7) {
case 0: /* ADC data */
snd->status &= ~0x10;
update_irq_status(snd);
ret = 0;
break;
case 2: /* status */
ret = snd->status;
ret |= (snd->ctrl & 0x01);
if ((snd->fifo_write_idx - snd->fifo_read_idx) >= 2048)
ret |= 0x08; /* FIFO full */
if (snd->fifo_read_idx == snd->fifo_write_idx)
ret |= 0x04; /* FIFO empty */
break;
case 3: /* FIFO timer */
/*
* The PS/1 Technical Reference says this should return
* thecurrent value, but the PS/1 BIOS and Stunt Island
* expect it not to change.
*/
ret = snd->timer_latch;
break;
case 4:
case 5:
case 6:
case 7:
ret = 0;
}
return(ret);
}
static void
snd_write(uint16_t port, uint8_t val, void *priv)
{
ps1snd_t *snd = (ps1snd_t *)priv;
switch (port & 7) {
case 0: /* DAC output */
if ((snd->fifo_write_idx - snd->fifo_read_idx) < 2048) {
snd->fifo[snd->fifo_write_idx & 2047] = val;
snd->fifo_write_idx++;
}
break;
case 2: /* control */
snd->ctrl = val;
if (! (val & 0x02))
snd->status &= ~0x02;
update_irq_status(snd);
break;
case 3: /* timer reload value */
snd->timer_latch = val;
if (val)
timer_set_delay_u64(&snd->timer_count, ((0xff-val) * TIMER_USEC));
else
timer_disable(&snd->timer_count);
break;
case 4: /* almost empty */
snd->fifo_threshold = val * 4;
break;
}
}
static void
snd_update(ps1snd_t *snd)
{
for (; snd->pos < sound_pos_global; snd->pos++)
snd->buffer[snd->pos] = (int8_t)(snd->dac_val ^ 0x80) * 0x20;
}
static void
snd_callback(void *priv)
{
ps1snd_t *snd = (ps1snd_t *)priv;
snd_update(snd);
if (snd->fifo_read_idx != snd->fifo_write_idx) {
snd->dac_val = snd->fifo[snd->fifo_read_idx & 2047];
snd->fifo_read_idx++;
}
if ((snd->fifo_write_idx - snd->fifo_read_idx) == snd->fifo_threshold)
snd->status |= 0x02; /*FIFO almost empty*/
snd->status |= 0x10; /*ADC data ready*/
update_irq_status(snd);
timer_advance_u64(&snd->timer_count, snd->timer_latch * TIMER_USEC);
}
static void
snd_get_buffer(int32_t *buffer, int len, void *priv)
{
ps1snd_t *snd = (ps1snd_t *)priv;
int c;
snd_update(snd);
for (c = 0; c < len * 2; c++)
buffer[c] += snd->buffer[c >> 1];
snd->pos = 0;
}
static void *
snd_init(const device_t *info)
{
ps1snd_t *snd;
snd = malloc(sizeof(ps1snd_t));
memset(snd, 0x00, sizeof(ps1snd_t));
sn76489_init(&snd->sn76489, 0x0205, 0x0001, SN76496, 4000000);
io_sethandler(0x0200, 1, snd_read,NULL,NULL, snd_write,NULL,NULL, snd);
io_sethandler(0x0202, 6, snd_read,NULL,NULL, snd_write,NULL,NULL, snd);
timer_add(&snd->timer_count, snd_callback, snd, 0);
sound_add_handler(snd_get_buffer, snd);
return(snd);
}
static void
snd_close(void *priv)
{
ps1snd_t *snd = (ps1snd_t *)priv;
free(snd);
}
static const device_t snd_device = {
"PS/1 Audio Card",
0, 0,
snd_init, snd_close, NULL,
{ NULL },
NULL,
NULL
};
static void
recalc_memory(ps1_t *ps)
{
@@ -470,7 +282,7 @@ ps1_setup(int model)
lpt2_remove();
device_add(&snd_device);
device_add(&ps1snd_device);
device_add(&fdc_at_ps1_device);
@@ -499,7 +311,7 @@ ps1_setup(int model)
device_add(&ide_isa_device);
device_add(&snd_device);
device_add(&ps1snd_device);
}
}

2
src/sound/CMakeLists.txt
View File

@@ -15,7 +15,7 @@
add_library(snd OBJECT sound.c openal.c snd_opl.c snd_opl_nuked.c snd_resid.cc
midi.c midi_rtmidi.cpp snd_speaker.c snd_pssj.c snd_lpt_dac.c snd_ac97_codec.c snd_ac97_via.c
snd_lpt_dss.c snd_adlib.c snd_adlibgold.c snd_ad1848.c snd_audiopci.c
snd_lpt_dss.c snd_ps1.c snd_adlib.c snd_adlibgold.c snd_ad1848.c snd_audiopci.c
snd_azt2316a.c snd_cms.c snd_cs423x.c snd_gus.c snd_sb.c snd_sb_dsp.c
snd_emu8k.c snd_mpu401.c snd_sn76489.c snd_ssi2001.c snd_wss.c snd_ym7128.c)

200
src/sound/snd_ps1.c Normal file
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@@ -0,0 +1,200 @@
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#define HAVE_STDARG_H
#include <86box/86box.h>
#include <86box/io.h>
#include <86box/timer.h>
#include <86box/device.h>
#include <86box/sound.h>
#include <86box/snd_sn76489.h>
typedef struct {
sn76489_t sn76489;
uint8_t status, ctrl;
uint64_t timer_latch;
pc_timer_t timer_count;
int timer_enable;
uint8_t fifo[2048];
int fifo_read_idx, fifo_write_idx;
int fifo_threshold;
uint8_t dac_val;
int16_t buffer[SOUNDBUFLEN];
int pos;
} ps1snd_t;
static void
ps1snd_update_irq_status(ps1snd_t *snd)
{
if (((snd->status & snd->ctrl) & 0x12) && (snd->ctrl & 0x01))
picint(1 << 7);
else
picintc(1 << 7);
}
static uint8_t
ps1snd_read(uint16_t port, void *priv)
{
ps1snd_t *ps1snd = (ps1snd_t *)priv;
uint8_t ret = 0xff;
switch (port & 7) {
case 0: /* ADC data */
ps1snd->status &= ~0x10;
ps1snd_update_irq_status(ps1snd);
ret = 0;
break;
case 2: /* status */
ret = ps1snd->status;
ret |= (ps1snd->ctrl & 0x01);
if ((ps1snd->fifo_write_idx - ps1snd->fifo_read_idx) >= 2048)
ret |= 0x08; /* FIFO full */
if (ps1snd->fifo_read_idx == ps1snd->fifo_write_idx)
ret |= 0x04; /* FIFO empty */
break;
case 3: /* FIFO timer */
/*
* The PS/1 Technical Reference says this should return
* thecurrent value, but the PS/1 BIOS and Stunt Island
* expect it not to change.
*/
ret = ps1snd->timer_latch;
break;
case 4:
case 5:
case 6:
case 7:
ret = 0;
}
return(ret);
}
static void
ps1snd_write(uint16_t port, uint8_t val, void *priv)
{
ps1snd_t *ps1snd = (ps1snd_t *)priv;
switch (port & 7) {
case 0: /* DAC output */
if ((ps1snd->fifo_write_idx - ps1snd->fifo_read_idx) < 2048) {
ps1snd->fifo[ps1snd->fifo_write_idx & 2047] = val;
ps1snd->fifo_write_idx++;
}
break;
case 2: /* control */
ps1snd->ctrl = val;
if (! (val & 0x02))
ps1snd->status &= ~0x02;
ps1snd_update_irq_status(ps1snd);
break;
case 3: /* timer reload value */
ps1snd->timer_latch = val;
if (val)
timer_set_delay_u64(&ps1snd->timer_count, ((0xff-val) * TIMER_USEC));
else
timer_disable(&ps1snd->timer_count);
break;
case 4: /* almost empty */
ps1snd->fifo_threshold = val * 4;
break;
}
}
static void
ps1snd_update(ps1snd_t *ps1snd)
{
for (; ps1snd->pos < sound_pos_global; ps1snd->pos++)
ps1snd->buffer[ps1snd->pos] = (int8_t)(ps1snd->dac_val ^ 0x80) * 0x20;
}
static void
ps1snd_callback(void *priv)
{
ps1snd_t *ps1snd = (ps1snd_t *)priv;
ps1snd_update(ps1snd);
if (ps1snd->fifo_read_idx != ps1snd->fifo_write_idx) {
ps1snd->dac_val = ps1snd->fifo[ps1snd->fifo_read_idx & 2047];
ps1snd->fifo_read_idx++;
}
if ((ps1snd->fifo_write_idx - ps1snd->fifo_read_idx) == ps1snd->fifo_threshold)
ps1snd->status |= 0x02; /*FIFO almost empty*/
ps1snd->status |= 0x10; /*ADC data ready*/
ps1snd_update_irq_status(ps1snd);
timer_advance_u64(&ps1snd->timer_count, ps1snd->timer_latch * TIMER_USEC);
}
static void
ps1snd_get_buffer(int32_t *buffer, int len, void *priv)
{
ps1snd_t *ps1snd = (ps1snd_t *)priv;
int c;
ps1_snd_update(ps1snd);
for (c = 0; c < len * 2; c++)
buffer[c] += ps1snd->buffer[c >> 1];
ps1snd->pos = 0;
}
static void *
ps1snd_init(const device_t *info)
{
ps1snd_t *ps1snd = malloc(sizeof(ps1snd_t));
memset(ps1snd, 0x00, sizeof(ps1snd_t));
sn76489_init(&ps1snd->sn76489, 0x0205, 0x0001, SN76496, 4000000);
io_sethandler(0x0200, 1, ps1snd_read,NULL,NULL, ps1snd_write,NULL,NULL, ps1snd);
io_sethandler(0x0202, 6, ps1snd_read,NULL,NULL, ps1snd_write,NULL,NULL, ps1snd);
timer_add(&ps1snd->timer_count, ps1snd_callback, ps1snd, 0);
sound_add_handler(ps1snd_get_buffer, ps1snd);
return(ps1snd);
}
static void
ps1snd_close(void *priv)
{
ps1snd_t *ps1snd = (ps1snd_t *)priv;
free(ps1snd);
}
static const device_t ps1snd_device = {
"IBM PS/1 Audio Card",
0,
0,
ps1snd_init, ps1snd_close,
NULL,
{ NULL },
NULL
NULL
};

1
src/win/Makefile.mingw
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@@ -620,6 +620,7 @@ SNDOBJ := sound.o \
midi.o midi_rtmidi.o \
snd_speaker.o \
snd_pssj.o \
snd_ps1.o \
snd_lpt_dac.o snd_lpt_dss.o \
snd_adlib.o snd_adlibgold.o snd_ad1848.o snd_audiopci.o \
snd_ac97_codec.o snd_ac97_via.o \