mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-09-29 18:28:35 +02:00
472 lines
15 KiB
C++
472 lines
15 KiB
C++
// license:BSD-3-Clause
|
|
// copyright-holders:Juergen Buchmueller, Manuel Abadia
|
|
/***************************************************************************
|
|
|
|
Philips SAA1099 Sound driver
|
|
|
|
By Juergen Buchmueller and Manuel Abadia
|
|
|
|
SAA1099 register layout:
|
|
========================
|
|
|
|
offs | 7654 3210 | description
|
|
-----+-----------+---------------------------
|
|
0x00 | ---- xxxx | Amplitude channel 0 (left)
|
|
0x00 | xxxx ---- | Amplitude channel 0 (right)
|
|
0x01 | ---- xxxx | Amplitude channel 1 (left)
|
|
0x01 | xxxx ---- | Amplitude channel 1 (right)
|
|
0x02 | ---- xxxx | Amplitude channel 2 (left)
|
|
0x02 | xxxx ---- | Amplitude channel 2 (right)
|
|
0x03 | ---- xxxx | Amplitude channel 3 (left)
|
|
0x03 | xxxx ---- | Amplitude channel 3 (right)
|
|
0x04 | ---- xxxx | Amplitude channel 4 (left)
|
|
0x04 | xxxx ---- | Amplitude channel 4 (right)
|
|
0x05 | ---- xxxx | Amplitude channel 5 (left)
|
|
0x05 | xxxx ---- | Amplitude channel 5 (right)
|
|
| |
|
|
0x08 | xxxx xxxx | Frequency channel 0
|
|
0x09 | xxxx xxxx | Frequency channel 1
|
|
0x0a | xxxx xxxx | Frequency channel 2
|
|
0x0b | xxxx xxxx | Frequency channel 3
|
|
0x0c | xxxx xxxx | Frequency channel 4
|
|
0x0d | xxxx xxxx | Frequency channel 5
|
|
| |
|
|
0x10 | ---- -xxx | Channel 0 octave select
|
|
0x10 | -xxx ---- | Channel 1 octave select
|
|
0x11 | ---- -xxx | Channel 2 octave select
|
|
0x11 | -xxx ---- | Channel 3 octave select
|
|
0x12 | ---- -xxx | Channel 4 octave select
|
|
0x12 | -xxx ---- | Channel 5 octave select
|
|
| |
|
|
0x14 | ---- ---x | Channel 0 frequency enable (0 = off, 1 = on)
|
|
0x14 | ---- --x- | Channel 1 frequency enable (0 = off, 1 = on)
|
|
0x14 | ---- -x-- | Channel 2 frequency enable (0 = off, 1 = on)
|
|
0x14 | ---- x--- | Channel 3 frequency enable (0 = off, 1 = on)
|
|
0x14 | ---x ---- | Channel 4 frequency enable (0 = off, 1 = on)
|
|
0x14 | --x- ---- | Channel 5 frequency enable (0 = off, 1 = on)
|
|
| |
|
|
0x15 | ---- ---x | Channel 0 noise enable (0 = off, 1 = on)
|
|
0x15 | ---- --x- | Channel 1 noise enable (0 = off, 1 = on)
|
|
0x15 | ---- -x-- | Channel 2 noise enable (0 = off, 1 = on)
|
|
0x15 | ---- x--- | Channel 3 noise enable (0 = off, 1 = on)
|
|
0x15 | ---x ---- | Channel 4 noise enable (0 = off, 1 = on)
|
|
0x15 | --x- ---- | Channel 5 noise enable (0 = off, 1 = on)
|
|
| |
|
|
0x16 | ---- --xx | Noise generator parameters 0
|
|
0x16 | --xx ---- | Noise generator parameters 1
|
|
| |
|
|
0x18 | --xx xxxx | Envelope generator 0 parameters
|
|
0x18 | x--- ---- | Envelope generator 0 control enable (0 = off, 1 = on)
|
|
0x19 | --xx xxxx | Envelope generator 1 parameters
|
|
0x19 | x--- ---- | Envelope generator 1 control enable (0 = off, 1 = on)
|
|
| |
|
|
0x1c | ---- ---x | All channels enable (0 = off, 1 = on)
|
|
0x1c | ---- --x- | Synch & Reset generators
|
|
|
|
Unspecified bits should be written as zero.
|
|
|
|
***************************************************************************/
|
|
|
|
#include "emu.h"
|
|
#include "saa1099.h"
|
|
|
|
#define LEFT 0x00
|
|
#define RIGHT 0x01
|
|
|
|
static const int amplitude_lookup[16] = {
|
|
0*32767/16, 1*32767/16, 2*32767/16, 3*32767/16,
|
|
4*32767/16, 5*32767/16, 6*32767/16, 7*32767/16,
|
|
8*32767/16, 9*32767/16, 10*32767/16, 11*32767/16,
|
|
12*32767/16, 13*32767/16, 14*32767/16, 15*32767/16
|
|
};
|
|
|
|
static const uint8_t envelope[8][64] = {
|
|
/* zero amplitude */
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
|
/* maximum amplitude */
|
|
{15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
|
|
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
|
|
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
|
|
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15, },
|
|
/* single decay */
|
|
{15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
|
/* repetitive decay */
|
|
{15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 },
|
|
/* single triangular */
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
|
/* repetitive triangular */
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
|
15,14,13,12,11,10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 },
|
|
/* single attack */
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
|
|
/* repetitive attack */
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 }
|
|
};
|
|
|
|
|
|
// device type definition
|
|
//DEFINE_DEVICE_TYPE(SAA1099, saa1099_device, "saa1099", "Philips SAA1099")
|
|
#define SAA1099 1
|
|
|
|
//**************************************************************************
|
|
// LIVE DEVICE
|
|
//**************************************************************************
|
|
|
|
//-------------------------------------------------
|
|
// saa1099_device - constructor
|
|
//-------------------------------------------------
|
|
|
|
#define FILL_ARRAY( _FILL_ ) memset( _FILL_, 0, sizeof( _FILL_ ) )
|
|
|
|
saa1099_device::saa1099_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
|
|
: device_t(mconfig, SAA1099, tag, owner, clock)
|
|
, device_sound_interface(mconfig, *this)
|
|
, m_stream(0)
|
|
#if 0
|
|
, m_noise_params{ 0, 0 }
|
|
, m_env_enable{ 0, 0 }
|
|
, m_env_reverse_right{ 0, 0 }
|
|
, m_env_mode{ 0, 0 }
|
|
, m_env_bits{ 0, 0 }
|
|
, m_env_clock{ 0, 0 }
|
|
, m_env_step{ 0, 0 }
|
|
#endif
|
|
, m_all_ch_enable(0)
|
|
, m_sync_state(0)
|
|
, m_selected_reg(0)
|
|
, m_sample_rate(0.0)
|
|
{
|
|
FILL_ARRAY( m_noise_params );
|
|
FILL_ARRAY( m_env_enable );
|
|
FILL_ARRAY( m_env_reverse_right );
|
|
FILL_ARRAY( m_env_mode );
|
|
FILL_ARRAY( m_env_bits );
|
|
FILL_ARRAY( m_env_clock );
|
|
FILL_ARRAY( m_env_step );
|
|
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// device_start - device-specific startup
|
|
//-------------------------------------------------
|
|
|
|
void saa1099_device::device_start()
|
|
{
|
|
/* copy global parameters */
|
|
m_master_clock = clock();
|
|
m_sample_rate = clock() / 256;
|
|
|
|
/* for each chip allocate one stream */
|
|
m_stream = stream_alloc(0, 2, m_sample_rate);
|
|
|
|
save_item(NAME(m_noise_params));
|
|
save_item(NAME(m_env_enable));
|
|
save_item(NAME(m_env_reverse_right));
|
|
save_item(NAME(m_env_mode));
|
|
save_item(NAME(m_env_bits));
|
|
save_item(NAME(m_env_clock));
|
|
save_item(NAME(m_env_step));
|
|
save_item(NAME(m_all_ch_enable));
|
|
save_item(NAME(m_sync_state));
|
|
save_item(NAME(m_selected_reg));
|
|
|
|
for (int i = 0; i < 6; i++)
|
|
{
|
|
save_item(NAME(m_channels[i].frequency), i);
|
|
save_item(NAME(m_channels[i].freq_enable), i);
|
|
save_item(NAME(m_channels[i].noise_enable), i);
|
|
save_item(NAME(m_channels[i].octave), i);
|
|
save_item(NAME(m_channels[i].amplitude), i);
|
|
save_item(NAME(m_channels[i].envelope), i);
|
|
save_item(NAME(m_channels[i].counter), i);
|
|
save_item(NAME(m_channels[i].freq), i);
|
|
save_item(NAME(m_channels[i].level), i);
|
|
}
|
|
|
|
for (int i = 0; i < 2; i++)
|
|
{
|
|
save_item(NAME(m_noise[i].counter), i);
|
|
save_item(NAME(m_noise[i].freq), i);
|
|
save_item(NAME(m_noise[i].level), i);
|
|
}
|
|
}
|
|
|
|
|
|
//-------------------------------------------------
|
|
// sound_stream_update - handle a stream update
|
|
//-------------------------------------------------
|
|
|
|
void saa1099_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
|
|
{
|
|
int j, ch;
|
|
/* if the channels are disabled we're done */
|
|
if (!m_all_ch_enable)
|
|
{
|
|
/* init output data */
|
|
memset(outputs[LEFT],0,samples*sizeof(*outputs[LEFT]));
|
|
memset(outputs[RIGHT],0,samples*sizeof(*outputs[RIGHT]));
|
|
return;
|
|
}
|
|
|
|
for (ch = 0; ch < 2; ch++)
|
|
{
|
|
switch (m_noise_params[ch])
|
|
{
|
|
case 0: m_noise[ch].freq = m_master_clock/256.0 * 2; break;
|
|
case 1: m_noise[ch].freq = m_master_clock/512.0 * 2; break;
|
|
case 2: m_noise[ch].freq = m_master_clock/1024.0 * 2; break;
|
|
case 3: m_noise[ch].freq = m_channels[ch * 3].freq; break; // todo: this case will be m_master_clock/[ch*3's octave divisor, 0 is = 256*2, higher numbers are higher] * 2 if the tone generator phase reset bit (0x1c bit 1) is set.
|
|
}
|
|
}
|
|
|
|
/* fill all data needed */
|
|
for( j = 0; j < samples; j++ )
|
|
{
|
|
int output_l = 0, output_r = 0;
|
|
|
|
/* for each channel */
|
|
for (ch = 0; ch < 6; ch++)
|
|
{
|
|
if (m_channels[ch].freq == 0.0)
|
|
m_channels[ch].freq = (double)((2 * m_master_clock / 512) << m_channels[ch].octave) /
|
|
(511.0 - (double)m_channels[ch].frequency);
|
|
|
|
/* check the actual position in the square wave */
|
|
m_channels[ch].counter -= m_channels[ch].freq;
|
|
while (m_channels[ch].counter < 0)
|
|
{
|
|
/* calculate new frequency now after the half wave is updated */
|
|
m_channels[ch].freq = (double)((2 * m_master_clock / 512) << m_channels[ch].octave) /
|
|
(511.0 - (double)m_channels[ch].frequency);
|
|
|
|
m_channels[ch].counter += m_sample_rate;
|
|
m_channels[ch].level ^= 1;
|
|
|
|
/* eventually clock the envelope counters */
|
|
if (ch == 1 && m_env_clock[0] == 0)
|
|
envelope_w(0);
|
|
if (ch == 4 && m_env_clock[1] == 0)
|
|
envelope_w(1);
|
|
}
|
|
|
|
// if the noise is enabled
|
|
if (m_channels[ch].noise_enable)
|
|
{
|
|
// if the noise level is high (noise 0: chan 0-2, noise 1: chan 3-5)
|
|
if (m_noise[ch/3].level & 1)
|
|
{
|
|
// subtract to avoid overflows, also use only half amplitude
|
|
output_l -= m_channels[ch].amplitude[ LEFT] * m_channels[ch].envelope[ LEFT] / 16 / 2;
|
|
output_r -= m_channels[ch].amplitude[RIGHT] * m_channels[ch].envelope[RIGHT] / 16 / 2;
|
|
}
|
|
}
|
|
// if the square wave is enabled
|
|
if (m_channels[ch].freq_enable)
|
|
{
|
|
// if the channel level is high
|
|
if (m_channels[ch].level & 1)
|
|
{
|
|
output_l += m_channels[ch].amplitude[ LEFT] * m_channels[ch].envelope[ LEFT] / 16;
|
|
output_r += m_channels[ch].amplitude[RIGHT] * m_channels[ch].envelope[RIGHT] / 16;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (ch = 0; ch < 2; ch++)
|
|
{
|
|
/* update the state of the noise generator
|
|
* polynomial is x^18 + x^11 + x (i.e. 0x20400) and is a plain XOR, initial state is probably all 1s
|
|
* see http://www.vogons.org/viewtopic.php?f=9&t=51695 */
|
|
m_noise[ch].counter -= m_noise[ch].freq;
|
|
while (m_noise[ch].counter < 0)
|
|
{
|
|
m_noise[ch].counter += m_sample_rate;
|
|
if( ((m_noise[ch].level & 0x20000) == 0) != ((m_noise[ch].level & 0x0400) == 0) )
|
|
m_noise[ch].level = (m_noise[ch].level << 1) | 1;
|
|
else
|
|
m_noise[ch].level <<= 1;
|
|
}
|
|
}
|
|
/* write sound data to the buffer */
|
|
outputs[LEFT][j] = output_l / 6;
|
|
outputs[RIGHT][j] = output_r / 6;
|
|
}
|
|
}
|
|
|
|
|
|
void saa1099_device::envelope_w(int ch)
|
|
{
|
|
if (m_env_enable[ch])
|
|
{
|
|
int step, mode, mask;
|
|
mode = m_env_mode[ch];
|
|
/* step from 0..63 and then loop in steps 32..63 */
|
|
step = m_env_step[ch] =
|
|
((m_env_step[ch] + 1) & 0x3f) | (m_env_step[ch] & 0x20);
|
|
|
|
mask = 15;
|
|
if (m_env_bits[ch])
|
|
mask &= ~1; /* 3 bit resolution, mask LSB */
|
|
|
|
m_channels[ch*3+0].envelope[ LEFT] =
|
|
m_channels[ch*3+1].envelope[ LEFT] =
|
|
m_channels[ch*3+2].envelope[ LEFT] = envelope[mode][step] & mask;
|
|
if (m_env_reverse_right[ch] & 0x01)
|
|
{
|
|
m_channels[ch*3+0].envelope[RIGHT] =
|
|
m_channels[ch*3+1].envelope[RIGHT] =
|
|
m_channels[ch*3+2].envelope[RIGHT] = (15 - envelope[mode][step]) & mask;
|
|
}
|
|
else
|
|
{
|
|
m_channels[ch*3+0].envelope[RIGHT] =
|
|
m_channels[ch*3+1].envelope[RIGHT] =
|
|
m_channels[ch*3+2].envelope[RIGHT] = envelope[mode][step] & mask;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* envelope mode off, set all envelope factors to 16 */
|
|
m_channels[ch*3+0].envelope[ LEFT] =
|
|
m_channels[ch*3+1].envelope[ LEFT] =
|
|
m_channels[ch*3+2].envelope[ LEFT] =
|
|
m_channels[ch*3+0].envelope[RIGHT] =
|
|
m_channels[ch*3+1].envelope[RIGHT] =
|
|
m_channels[ch*3+2].envelope[RIGHT] = 16;
|
|
}
|
|
}
|
|
|
|
|
|
WRITE8_MEMBER( saa1099_device::control_w )
|
|
{
|
|
if ((data & 0xff) > 0x1c)
|
|
{
|
|
/* Error! */
|
|
logerror("%s: (SAA1099 '%s') Unknown register selected\n", machine().describe_context(), tag());
|
|
}
|
|
|
|
m_selected_reg = data & 0x1f;
|
|
if (m_selected_reg == 0x18 || m_selected_reg == 0x19)
|
|
{
|
|
/* clock the envelope channels */
|
|
if (m_env_clock[0])
|
|
envelope_w(0);
|
|
if (m_env_clock[1])
|
|
envelope_w(1);
|
|
}
|
|
}
|
|
|
|
|
|
WRITE8_MEMBER( saa1099_device::data_w )
|
|
{
|
|
int reg = m_selected_reg;
|
|
int ch;
|
|
|
|
/* first update the stream to this point in time */
|
|
m_stream->update();
|
|
|
|
switch (reg)
|
|
{
|
|
/* channel i amplitude */
|
|
case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05:
|
|
ch = reg & 7;
|
|
m_channels[ch].amplitude[LEFT] = amplitude_lookup[data & 0x0f];
|
|
m_channels[ch].amplitude[RIGHT] = amplitude_lookup[(data >> 4) & 0x0f];
|
|
break;
|
|
/* channel i frequency */
|
|
case 0x08: case 0x09: case 0x0a: case 0x0b: case 0x0c: case 0x0d:
|
|
ch = reg & 7;
|
|
m_channels[ch].frequency = data & 0xff;
|
|
break;
|
|
/* channel i octave */
|
|
case 0x10: case 0x11: case 0x12:
|
|
ch = (reg - 0x10) << 1;
|
|
m_channels[ch + 0].octave = data & 0x07;
|
|
m_channels[ch + 1].octave = (data >> 4) & 0x07;
|
|
break;
|
|
/* channel i frequency enable */
|
|
case 0x14:
|
|
m_channels[0].freq_enable = data & 0x01;
|
|
m_channels[1].freq_enable = data & 0x02;
|
|
m_channels[2].freq_enable = data & 0x04;
|
|
m_channels[3].freq_enable = data & 0x08;
|
|
m_channels[4].freq_enable = data & 0x10;
|
|
m_channels[5].freq_enable = data & 0x20;
|
|
break;
|
|
/* channel i noise enable */
|
|
case 0x15:
|
|
m_channels[0].noise_enable = data & 0x01;
|
|
m_channels[1].noise_enable = data & 0x02;
|
|
m_channels[2].noise_enable = data & 0x04;
|
|
m_channels[3].noise_enable = data & 0x08;
|
|
m_channels[4].noise_enable = data & 0x10;
|
|
m_channels[5].noise_enable = data & 0x20;
|
|
break;
|
|
/* noise generators parameters */
|
|
case 0x16:
|
|
m_noise_params[0] = data & 0x03;
|
|
m_noise_params[1] = (data >> 4) & 0x03;
|
|
break;
|
|
/* envelope generators parameters */
|
|
case 0x18: case 0x19:
|
|
ch = reg - 0x18;
|
|
m_env_reverse_right[ch] = data & 0x01;
|
|
m_env_mode[ch] = (data >> 1) & 0x07;
|
|
m_env_bits[ch] = data & 0x10;
|
|
m_env_clock[ch] = data & 0x20;
|
|
m_env_enable[ch] = data & 0x80;
|
|
/* reset the envelope */
|
|
m_env_step[ch] = 0;
|
|
break;
|
|
/* channels enable & reset generators */
|
|
case 0x1c:
|
|
m_all_ch_enable = data & 0x01;
|
|
m_sync_state = data & 0x02;
|
|
if (data & 0x02)
|
|
{
|
|
int i;
|
|
|
|
/* Synch & Reset generators */
|
|
logerror("%s: (SAA1099 '%s') -reg 0x1c- Chip reset\n", machine().describe_context(), tag());
|
|
for (i = 0; i < 6; i++)
|
|
{
|
|
m_channels[i].level = 0;
|
|
m_channels[i].counter = 0.0;
|
|
}
|
|
}
|
|
break;
|
|
default: /* Error! */
|
|
if (data != 0)
|
|
logerror("%s: (SAA1099 '%s') Unknown operation (reg:%02x, data:%02x)\n", machine().describe_context(), tag(), reg, data);
|
|
}
|
|
}
|
|
|
|
WRITE8_MEMBER(saa1099_device::write)
|
|
{
|
|
if (offset & 1)
|
|
control_w(space, 0, data);
|
|
else
|
|
data_w(space, 0, data);
|
|
}
|