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pcem/src/sound_ad1848.c
SarahW 1181b13c2d Added Aztech Sound Galaxy Pro 16 AB (Washington, AZ2316A) and Aztech Sound 
Galaxy Nova 16 Extra (Clinton, AZ1605) emulation. Patch from EluanCM.
Clinton is currently marked as DEVICE_NOT_WORKING due to issues with DOS drivers.
2020-03-11 21:21:09 +00:00

285 lines
11 KiB
C
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#include <math.h>
#include "ibm.h"
#include "dma.h"
#include "pic.h"
#include "sound.h"
#include "sound_ad1848.h"
#include "x86.h"
static int ad1848_vols_6bits[64];
static uint32_t ad1848_vols_5bits_aux_gain[32];
void ad1848_setirq(ad1848_t *ad1848, int irq)
{
ad1848->irq = irq;
}
void ad1848_setdma(ad1848_t *ad1848, int dma)
{
ad1848->dma = dma;
}
uint8_t ad1848_read(uint16_t addr, void *p)
{
ad1848_t *ad1848 = (ad1848_t *)p;
uint8_t temp = 0xff;
switch (addr & 3)
{
case 0: /*Index*/
temp = ad1848->index | ad1848->trd | ad1848->mce;
break;
case 1:
temp = ad1848->regs[ad1848->index];
break;
case 2:
temp = ad1848->status;
break;
}
// if ((addr & 3) == 1 && (ad1848->index & 0x1f) > 0x0f)
// pclog("ad1848_read_EXTENDED - addr %04X %04X(%08X):%08X return %02X\n", addr, CS, cs, cpu_state.pc, temp);
// else
// pclog("ad1848_read - addr %04X %04X(%08X):%08X return %02X\n", addr, CS, cs, cpu_state.pc, temp);
return temp;
}
void ad1848_write(uint16_t addr, uint8_t val, void *p)
{
ad1848_t *ad1848 = (ad1848_t *)p;
double freq;
uint32_t new_cd_vol_l, new_cd_vol_r;
// if ((addr & 3) == 0 && (val & 0x1f) > 0x0f)
// pclog("ad1848_write_EXTENDED - addr %04X val %02X %04X(%08X):%08X\n", addr, val, CS, cs, cpu_state.pc);
// else
// pclog("ad1848_write - addr %04X val %02X %04X(%08X):%08X\n", addr, val, CS, cs, cpu_state.pc);
switch (addr & 3)
{
case 0: /*Index*/
if (ad1848->regs[12] & 0x40 && ad1848->type == AD1848_TYPE_CS4231)
ad1848->index = val & 0x1f; // cs4231a extended mode enabled
else
ad1848->index = val & 0x0f; // ad1848/cs4248 mode TODO: some variants/clones DO NOT mirror, just ignore the writes?
ad1848->trd = val & 0x20;
ad1848->mce = val & 0x40;
break;
case 1:
switch (ad1848->index)
{
case 8:
freq = (val & 1) ? 16934400 : 24576000;
switch ((val >> 1) & 7)
{
case 0: freq /= 3072; break;
case 1: freq /= 1536; break;
case 2: freq /= 896; break;
case 3: freq /= 768; break;
case 4: freq /= 448; break;
case 5: freq /= 384; break;
case 6: freq /= 512; break;
case 7: freq /= 2560; break;
}
ad1848->freq = freq;
ad1848->timer_latch = (uint64_t)((double)TIMER_USEC * (1000000.0 / (double)ad1848->freq));
break;
case 9:
if (!ad1848->enable && (val & 0x41) == 0x01)
{
if (ad1848->timer_latch)
timer_set_delay_u64(&ad1848->timer, ad1848->timer_latch);
else
timer_set_delay_u64(&ad1848->timer, TIMER_USEC);
}
ad1848->enable = ((val & 0x41) == 0x01);
if (!ad1848->enable)
{
timer_disable(&ad1848->timer);
ad1848->out_l = ad1848->out_r = 0;
}
break;
case 12:
ad1848->regs[12] = ((ad1848->regs[12] & 0x0f) + (val & 0xf0)) | 0x80;
return;
case 14:
ad1848->count = ad1848->regs[15] | (val << 8);
break;
// TODO: see which of the extended registers should be read only
}
ad1848->regs[ad1848->index] = val;
if (ad1848->type == AD1848_TYPE_CS4231) // TODO: configure CD volume for CS4248/AD1848 too
{
if (ad1848->regs[0x12] & 0x80)
new_cd_vol_l = 0;
else
new_cd_vol_l = ad1848_vols_5bits_aux_gain[ad1848->regs[0x12] & 0x1f];
if (ad1848->regs[0x13] & 0x80)
new_cd_vol_r = 0;
else
new_cd_vol_r = ad1848_vols_5bits_aux_gain[ad1848->regs[0x13] & 0x1f];
// Apparently there is no master volume to modulate here
// (The windows mixer just adjusts all registers at the same
// time when the master slider is adjusted)
sound_set_cd_volume(new_cd_vol_l, new_cd_vol_r);
}
break;
case 2:
ad1848->status &= 0xfe;
break;
}
}
void ad1848_speed_changed(ad1848_t *ad1848)
{
ad1848->timer_latch = (uint64_t)((double)TIMER_USEC * (1000000.0 / (double)ad1848->freq));
}
void ad1848_update(ad1848_t *ad1848)
{
for (; ad1848->pos < sound_pos_global; ad1848->pos++)
{
ad1848->buffer[ad1848->pos*2] = ad1848->out_l;
ad1848->buffer[ad1848->pos*2 + 1] = ad1848->out_r;
}
}
static void ad1848_poll(void *p)
{
ad1848_t *ad1848 = (ad1848_t *)p;
if (ad1848->timer_latch)
timer_advance_u64(&ad1848->timer, ad1848->timer_latch);
else
timer_advance_u64(&ad1848->timer, TIMER_USEC*1000);
ad1848_update(ad1848);
// TODO: line in, mic, etc...
if (ad1848->enable)
{
int32_t temp;
switch (ad1848->regs[8] & 0x70)
{
case 0x00: /*Mono, 8-bit PCM*/
ad1848->out_l = ad1848->out_r = (dma_channel_read(ad1848->dma) ^ 0x80) * 256;
break;
case 0x10: /*Stereo, 8-bit PCM*/
ad1848->out_l = (dma_channel_read(ad1848->dma) ^ 0x80) * 256;
ad1848->out_r = (dma_channel_read(ad1848->dma) ^ 0x80) * 256;
break;
case 0x40: /*Mono, 16-bit PCM*/
temp = dma_channel_read(ad1848->dma);
ad1848->out_l = ad1848->out_r = (dma_channel_read(ad1848->dma) << 8) | temp;
break;
case 0x50: /*Stereo, 16-bit PCM*/
temp = dma_channel_read(ad1848->dma);
ad1848->out_l = (dma_channel_read(ad1848->dma) << 8) | temp;
temp = dma_channel_read(ad1848->dma);
ad1848->out_r = (dma_channel_read(ad1848->dma) << 8) | temp;
break;
}
if (ad1848->regs[6] & 0x80)
ad1848->out_l = 0;
else
ad1848->out_l = (ad1848->out_l * ad1848_vols_6bits[ad1848->regs[6] & 0x3f]) >> 16;
if (ad1848->regs[7] & 0x80)
ad1848->out_r = 0;
else
ad1848->out_r = (ad1848->out_r * ad1848_vols_6bits[ad1848->regs[7] & 0x3f]) >> 16;
if (ad1848->count < 0)
{
ad1848->count = ad1848->regs[15] | (ad1848->regs[14] << 8);
if (!(ad1848->status & 0x01))
{
ad1848->status |= 0x01;
if (ad1848->regs[0xa] & 2)
picint(1 << ad1848->irq);
}
}
ad1848->count--;
// pclog("ad1848_poll : enable %X %X %X %X %X %X\n", ad1848->pcm_buffer[0][ad1848->pos], ad1848->pcm_buffer[1][ad1848->pos], ad1848->out_l[0], ad1848->out_r[0], ad1848->out_l[1], ad1848->out_r[1]);
}
else
{
ad1848->out_l = ad1848->out_r = 0;
sound_set_cd_volume(0, 0);
// pclog("ad1848_poll : not enable\n");
}
}
void ad1848_init(ad1848_t *ad1848, int type)
{
int c;
double attenuation;
ad1848->type = type;
ad1848->enable = 0;
ad1848->status = 0xcc;
ad1848->index = ad1848->trd = 0;
ad1848->mce = 0x40;
ad1848->regs[0] = ad1848->regs[1] = 0;
ad1848->regs[2] = ad1848->regs[3] = 0x80; // AZT2316A Line-in
ad1848->regs[4] = ad1848->regs[5] = 0x80;
ad1848->regs[6] = ad1848->regs[7] = 0x80; // AZT2316A Master?
ad1848->regs[8] = 0;
ad1848->regs[9] = 0x08;
ad1848->regs[10] = ad1848->regs[11] = 0;
if (ad1848->type == AD1848_TYPE_CS4248 || ad1848->type == AD1848_TYPE_CS4231)
ad1848->regs[12] = 0x8a;
else
ad1848->regs[12] = 0xa;
ad1848->regs[13] = 0;
ad1848->regs[14] = ad1848->regs[15] = 0;
if (ad1848->type == AD1848_TYPE_CS4231)
{
ad1848->regs[0x12] = ad1848->regs[0x13] = 0x80; // AZT2316A CD
ad1848->regs[0x1A] = 0x80; // AZT2316A Mic
}
ad1848->out_l = 0;
ad1848->out_r = 0;
for (c = 0; c < 64; c++)
{
attenuation = 0.0;
if (c & 0x01) attenuation -= 1.5;
if (c & 0x02) attenuation -= 3.0;
if (c & 0x04) attenuation -= 6.0;
if (c & 0x08) attenuation -= 12.0;
if (c & 0x10) attenuation -= 24.0;
if (c & 0x20) attenuation -= 48.0;
attenuation = pow(10, attenuation / 10);
ad1848_vols_6bits[c] = (int)(attenuation * 65536);
// pclog("ad1848_vols_6bits %i = %f %i\n", c, attenuation, ad1848_vols_6bits[c]);
}
for (c = 0; c < 32; c++)
{
attenuation = 12.0;
if (c & 0x01) attenuation -= 1.5;
if (c & 0x02) attenuation -= 3.0;
if (c & 0x04) attenuation -= 6.0;
if (c & 0x08) attenuation -= 12.0;
if (c & 0x10) attenuation -= 24.0;
attenuation = pow(10, attenuation / 10);
ad1848_vols_5bits_aux_gain[c] = (int)(attenuation * 65536);
// pclog("ad1848_vols_5bits_aux_gain %i = %f %i\n", c, attenuation, ad1848_vols_5bits_aux_gain[c]);
}
timer_add(&ad1848->timer, ad1848_poll, ad1848, 0);
}
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