Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-06-04 11:56:28 +03:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity
2da4d7f317
mame/src/mess/machine/isa_sblaster.c

1689 lines
45 KiB
C
Raw Blame History

/***************************************************************************
ISA 8/16 bit Creative Labs Sound Blaster Sound Card
TODO:
- implement DAC
- DSP type is a MCS-51 family, it has an internal ROM that needs decapping;
- implement jumpers DIP-SWs;
***************************************************************************/
#include "emu.h"
#include "isa_sblaster.h"
#include "sound/speaker.h"
#include "sound/3812intf.h"
#include "sound/262intf.h"
#include "sound/saa1099.h"
#include "sound/dac.h"
#include "machine/pic8259.h"
/*
adlib (YM3812/OPL2 chip), part of many many soundcards (soundblaster)
soundblaster: YM3812 also accessible at 0x228/9 (address jumperable)
soundblaster pro version 1: 2 YM3812 chips
at 0x388 both accessed,
at 0x220/1 left?, 0x222/3 right? (jumperable)
soundblaster pro version 2: 1 OPL3 chip
pro audio spectrum +: 2 OPL2
pro audio spectrum 16: 1 OPL3
2 x saa1099 chips
also on sound blaster 1.0
option on sound blaster 1.5
jumperable? normally 0x220
*/
#define ym3812_StdClock XTAL_3_579545MHz
#define ymf262_StdClock XTAL_14_31818MHz
static const int m_cmd_fifo_length[256] =
{
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
-1, -1, -1, -1, 1, 3, -1, -1, -1, -1, -1, -1, -1, -1, 2, 1, /* 0x */
2, -1, -1, -1, 3, -1, 3, 3, -1, -1, -1, -1, 1, -1, -1, 1, /* 1x */
-1, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 2x */
1, 1, -1, -1, 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, -1, -1, /* 3x */
2, 3, 3, -1, -1, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1, /* 4x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 5x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 6x */
-1, -1, -1, -1, 3, 3, 3, 3, -1, -1, -1, -1, -1, 1, -1, 1, /* 7x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 8x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 9x */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* Ax */
4, -1, -1, -1, -1, -1, 4, -1, 4, -1, -1, -1, -1, -1, 4, -1, /* Bx */
4, -1, -1, -1, -1, -1, 4, -1, 4, -1, -1, -1, -1, -1, 4, -1, /* Cx */
1, 1, -1, 1, -1, 1, 1, -1, 1, 1, 1, -1, -1, -1, -1, -1, /* Dx */
2, 1, 2, 1, 2, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, /* Ex */
-1, -1, 1, -1, -1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1 /* Fx */
};
static const int protection_magic[4] = { 0x96, 0xa5, 0x69, 0x5a };
static const ym3812_interface pc_ym3812_interface =
{
NULL
};
static const ymf262_interface pc_ymf262_interface =
{
NULL
};
static SLOT_INTERFACE_START(midiin_slot)
SLOT_INTERFACE("midiin", MIDIIN_PORT)
SLOT_INTERFACE_END
static const serial_port_interface midiin_intf =
{
DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, sb_device, midi_rx_w)
};
static SLOT_INTERFACE_START(midiout_slot)
SLOT_INTERFACE("midiout", MIDIOUT_PORT)
SLOT_INTERFACE_END
static const serial_port_interface midiout_intf =
{
DEVCB_NULL // midi out ports don't transmit inward
};
static MACHINE_CONFIG_FRAGMENT( sblaster1_0_config )
MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
MCFG_SOUND_ADD("ym3812", YM3812, ym3812_StdClock)
MCFG_SOUND_CONFIG(pc_ym3812_interface)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 3.00)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 3.00)
MCFG_SAA1099_ADD("saa1099.1", 4772720)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.50)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.50)
MCFG_SAA1099_ADD("saa1099.2", 4772720)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.50)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.50)
MCFG_SOUND_ADD("sbdacl", DAC, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.00)
MCFG_SOUND_ADD("sbdacr", DAC, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.00)
MCFG_PC_JOY_ADD("joy")
MCFG_SERIAL_PORT_ADD("mdin", midiin_intf, midiin_slot, "midiin", NULL)
MCFG_SERIAL_PORT_ADD("mdout", midiout_intf, midiout_slot, "midiout", NULL)
MACHINE_CONFIG_END
static MACHINE_CONFIG_FRAGMENT( sblaster1_5_config )
MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
MCFG_SOUND_ADD("ym3812", YM3812, ym3812_StdClock)
MCFG_SOUND_CONFIG(pc_ym3812_interface)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.00)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.00)
/* no CM/S support (empty sockets) */
MCFG_SOUND_ADD("sbdacl", DAC, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.00)
MCFG_SOUND_ADD("sbdacr", DAC, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.00)
MCFG_PC_JOY_ADD("joy")
MCFG_SERIAL_PORT_ADD("mdin", midiin_intf, midiin_slot, "midiin", NULL)
MCFG_SERIAL_PORT_ADD("mdout", midiout_intf, midiout_slot, "midiout", NULL)
MACHINE_CONFIG_END
static MACHINE_CONFIG_FRAGMENT( sblaster_16_config )
MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
MCFG_SOUND_ADD("ymf262", YMF262, ymf262_StdClock)
MCFG_SOUND_CONFIG(pc_ymf262_interface)
MCFG_SOUND_ROUTE(0, "lspeaker", 1.00)
MCFG_SOUND_ROUTE(1, "rspeaker", 1.00)
MCFG_SOUND_ROUTE(2, "lspeaker", 1.00)
MCFG_SOUND_ROUTE(3, "rspeaker", 1.00)
MCFG_SOUND_ADD("sbdacl", DAC, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.00)
MCFG_SOUND_ADD("sbdacr", DAC, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.00)
MCFG_PC_JOY_ADD("joy")
MCFG_SERIAL_PORT_ADD("mdin", midiin_intf, midiin_slot, "midiin", NULL)
MCFG_SERIAL_PORT_ADD("mdout", midiout_intf, midiout_slot, "midiout", NULL)
MACHINE_CONFIG_END
static READ8_DEVICE_HANDLER( ym3812_16_r )
{
UINT8 retVal = 0xff;
switch(offset)
{
case 0 : retVal = ym3812_status_port_r( device, space, offset ); break;
}
return retVal;
}
static WRITE8_DEVICE_HANDLER( ym3812_16_w )
{
switch(offset)
{
case 0 : ym3812_control_port_w( device, space, offset, data ); break;
case 1 : ym3812_write_port_w( device, space, offset, data ); break;
}
}
static READ8_DEVICE_HANDLER( saa1099_16_r )
{
return 0xff;
}
static WRITE8_DEVICE_HANDLER( saa1099_16_w )
{
switch(offset)
{
case 0 : dynamic_cast<saa1099_device*>(device)->saa1099_control_w( space, offset, data ); break;
case 1 : dynamic_cast<saa1099_device*>(device)->saa1099_data_w( space, offset, data ); break;
}
}
void sb_device::queue(UINT8 data)
{
if (m_dsp.fifo_ptr < 15)
{
m_dsp.fifo[m_dsp.fifo_ptr] = data;
m_dsp.fifo_ptr++;
}
else
{
// FIFO gets to la-la-land
//logerror("FIFO?\n");
}
}
void sb_device::queue_r(UINT8 data)
{
m_dsp.rbuf_status |= 0x80;
if (m_dsp.fifo_r_ptr < 52)
{
m_dsp.fifo_r[m_dsp.fifo_r_ptr] = data;
m_dsp.fifo_r_ptr++;
}
else
{
// FIFO gets to la-la-land
//logerror("FIFO?\n");
}
}
UINT8 sb_device::dequeue_r()
{
UINT8 data = m_dsp.fifo_r[0];
if (m_dsp.fifo_r_ptr > 0)
{
for (int i = 0; i < 51; i++)
m_dsp.fifo_r[i] = m_dsp.fifo_r[i + 1];
m_dsp.fifo_r[51] = 0;
m_dsp.fifo_r_ptr--;
}
if(m_dsp.fifo_r_ptr == 0)
m_dsp.rbuf_status &= ~0x80;
return data;
}
READ8_MEMBER( sb_device::dsp_reset_r )
{
// printf("read DSP reset @ %x\n", offset);
if(offset)
return 0xff;
logerror("Soundblaster DSP Reset port undocumented read\n");
return 0xff;
}
WRITE8_MEMBER( sb_device::dsp_reset_w )
{
// printf("%02x to DSP reset @ %x\n", data, offset);
if(offset)
return;
// a reset while in UART MIDI mode simply restores the previous
// operating state (page 5-3 of the Creative manual).
if (!m_uart_midi)
{
if(data == 0 && m_dsp.reset_latch == 1)
{
// reset routine
m_dsp.fifo_ptr = 0;
m_dsp.fifo_r_ptr = 0;
for(int i=0;i < 15; i++)
{
m_dsp.fifo[i] = 0;
m_dsp.fifo_r[i] = 0;
}
queue_r(0xaa); // reset OK ID
}
m_dsp.reset_latch = data;
drq_w(0);
m_dsp.dma_autoinit = 0;
irq_w(0, IRQ_ALL);
m_timer->adjust(attotime::never, 0);
m_dsp.d_rptr = 0;
m_dsp.d_wptr = 0;
m_dsp.dma_throttled = false;
m_dsp.dma_timer_started = false;
}
m_onebyte_midi = false;
m_uart_midi = false;
m_uart_irq = false;
m_mpu_midi = false;
m_tx_busy = false;
m_xmit_read = m_xmit_write = 0;
m_recv_read = m_recv_write = 0;
m_rx_waiting = m_tx_waiting = 0;
//printf("%02x\n",data);
}
READ8_MEMBER( sb_device::dsp_data_r )
{
// printf("read DSP data @ %x\n", offset);
if(offset)
return 0xff;
if (m_uart_midi)
{
UINT8 rv = m_recvring[m_recv_read++];
if (m_recv_read >= MIDI_RING_SIZE)
{
m_recv_read = 0;
}
if (m_rx_waiting)
{
m_rx_waiting--;
}
return rv;
}
return dequeue_r();
}
WRITE8_MEMBER( sb_device::dsp_data_w )
{
// printf("%02x to DSP data @ %x\n", data, offset);
if(offset)
return;
logerror("Soundblaster DSP data port undocumented write\n");
}
READ8_MEMBER(sb_device::dsp_rbuf_status_r)
{
// printf("read Rbufstat @ %x\n", offset);
if(offset)
{
if(m_dsp.version > 0x0400)
irq_w(0, IRQ_DMA16);
return 0xff;
}
// printf("Clear IRQ5\n");
irq_w(0, IRQ_DMA8); // reading this port ACKs the card's IRQ, 8-bit dma only?
// in either SB-MIDI mode, bit 7 indicates if a character is available
// to read.
if (m_uart_midi || m_onebyte_midi)
{
if (m_rx_waiting)
{
return 0x80;
}
return 0x00;
}
return m_dsp.rbuf_status;
}
READ8_MEMBER(sb_device::dsp_wbuf_status_r)
{
// printf("read Wbufstat @ %x\n", offset);
if(offset)
return 0xff;
// in either SB-MIDI mode, bit 7 indicates if there's space to write.
// set = buffer full
if (m_uart_midi || m_onebyte_midi)
{
if (m_tx_waiting >= MIDI_RING_SIZE)
{
return 0x80;
}
return 0x00;
}
return m_dsp.wbuf_status;
}
WRITE8_MEMBER(sb_device::dsp_rbuf_status_w)
{
// printf("%02x to Rbufstat @ %x\n", data, offset);
if(offset)
return;
logerror("Soundblaster DSP Read Buffer status undocumented write\n");
}
void sb_device::process_fifo(UINT8 cmd)
{
if (m_cmd_fifo_length[cmd] == -1)
{
logerror("SB: unemulated or undefined fifo command %02x\n",cmd);
m_dsp.fifo_ptr = 0;
}
else if(m_dsp.fifo_ptr == m_cmd_fifo_length[cmd])
{
/* get FIFO params */
// printf("SB FIFO command: %02x\n", cmd);
switch(cmd)
{
case 0x10: // Direct DAC
break;
case 0x14: // 8-bit DMA, no autoinit
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
// printf("Start DMA (not autoinit, size = %x)\n", m_dsp.dma_length);
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 0;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = 0;
break;
case 0x17: // 2-bit ADPCM w/new reference
m_dsp.adpcm_new_ref = true;
m_dsp.adpcm_step = 0;
case 0x16: // 2-bit ADPCM
m_dsp.adpcm_count = 0;
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 0;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = ADPCM2;
break;
case 0x1c: // 8-bit DMA with autoinit
// printf("Start DMA (autoinit, size = %x)\n", m_dsp.dma_length);
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 1;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = 0;
break;
case 0x24: // 8-bit ADC DMA
m_dsp.adc_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
// printf("Start DMA (not autoinit, size = %x)\n", m_dsp.adc_length);
m_dsp.adc_transferred = 0;
m_dsp.dma_autoinit = 0;
drq_w(1);
logerror("SB: ADC capture unimplemented\n");
break;
case 0x34:
m_uart_midi = true;
m_uart_irq = false;
break;
case 0x35:
m_uart_midi = true;
m_uart_irq = true;
break;
case 0x36:
case 0x37: // Enter UART mode
printf("timestamp MIDI mode not supported, contact MESSDEV!\n");
break;
case 0x38: // single-byte MIDI send
m_onebyte_midi = true;
break;
case 0x40: // set time constant
m_dsp.frequency = (1000000 / (256 - m_dsp.fifo[1]));
//printf("Set time constant: %02x -> %d\n", m_dsp.fifo[1], m_dsp.frequency);
break;
case 0x48: // set DMA block size (for auto-init)
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
break;
case 0x75: // 4-bit ADPCM w/new reference
m_dsp.adpcm_new_ref = true;
m_dsp.adpcm_step = 0;
case 0x74: // 4-bit ADPCM
m_dsp.adpcm_count = 0;
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 0;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = ADPCM4;
break;
case 0x77: // 2.6-bit ADPCM w/new reference
m_dsp.adpcm_new_ref = true;
m_dsp.adpcm_step = 0;
case 0x76: // 2.6-bit ADPCM
m_dsp.adpcm_count = 0;
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 0;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = ADPCM3;
break;
case 0xd0: // halt 8-bit DMA
m_timer->adjust(attotime::never, 0);
drq_w(0); // drop DRQ
m_dsp.dma_throttled = false;
m_dsp.dma_timer_started = false;
break;
case 0xd1: // speaker on
// ...
m_dsp.speaker_on = 1;
break;
case 0xd3: // speaker off
// ...
m_dsp.speaker_on = 0;
break;
case 0xd8: // speaker status
queue_r(m_dsp.speaker_on ? 0xff : 0x00);
break;
case 0xe0: // get DSP identification
queue_r(m_dsp.fifo[1] ^ 0xff);
break;
case 0xe1: // get DSP version
queue_r(m_dsp.version >> 8);
queue_r(m_dsp.version & 0xff);
break;
case 0xe2: // DSP protection
m_dsp.prot_value += protection_magic[m_dsp.prot_count++] ^ m_dsp.fifo[1];
m_dsp.prot_count &= 3;
m_dsp.adc_transferred = 0;
m_dsp.adc_length = 1;
m_dsp.wbuf_status = 0x80;
m_dsp.dma_no_irq = true;
m_dack_out = (UINT8)(m_dsp.prot_value & 0xff);
drq_w(1);
break;
case 0xe4: // write test register
m_dsp.test_reg = m_dsp.fifo[1];
break;
case 0xe8: // read test register
queue_r(m_dsp.test_reg);
break;
case 0xf2: // send PIC irq
irq_w(1, IRQ_DMA8);
break;
case 0xf8: // ???
logerror("SB: Unknown command write 0xf8\n");
queue_r(0);
break;
default:
if(m_dsp.version >= 0x0201) // SB 2.0
{
switch(cmd)
{
case 0x1f: // 2-bit autoinit ADPCM w/new reference
m_dsp.adpcm_new_ref = true;
m_dsp.adpcm_step = 0;
m_dsp.adpcm_count = 0;
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 1;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = ADPCM2;
break;
case 0x7d: // 4-bit autoinit ADPCM w/new reference
m_dsp.adpcm_new_ref = true;
m_dsp.adpcm_step = 0;
m_dsp.adpcm_count = 0;
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 1;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = ADPCM4;
break;
case 0x7f: // 2.6-bit autoinit ADPCM w/new reference
m_dsp.adpcm_new_ref = true;
m_dsp.adpcm_step = 0;
m_dsp.adpcm_count = 0;
m_dsp.dma_length = (m_dsp.fifo[1] + (m_dsp.fifo[2]<<8)) + 1;
m_dsp.dma_transferred = 0;
m_dsp.dma_autoinit = 1;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
drq_w(1);
m_dsp.flags = ADPCM3;
break;
case 0xda: // stop 8-bit autoinit
m_dsp.dma_autoinit = 0;
break;
}
}
if(m_dsp.version >= 0x0301) // SB Pro 2
{
switch(cmd)
{
case 0xe3: // copyright notice, check if in pro 2
const char* copyright = "NOT COPYRIGHT (C) CREATIVE TECHNOLOGY LTD, 1992.";
int j = strlen(copyright);
for(int k = 4; k <= j; k++)
queue_r(copyright[k]);
break;
}
}
if(m_dsp.version >= 0x0400) // SB16
{
int mode;
switch(cmd)
{
case 0x0f: // read asp reg
queue_r(0);
case 0x0e: // write asp reg
case 0x02: // get asp version
case 0x04: // set asp mode register
case 0x05: // set asp codec param
logerror("SB16: unimplemented ASP command\n");
break;
case 0x41: // set output sample rate
m_dsp.frequency = m_dsp.fifo[2] + (m_dsp.fifo[1] << 8);
break;
case 0x42: // set input sample rate
m_dsp.adc_freq = m_dsp.fifo[2] + (m_dsp.fifo[1] << 8);
break;
case 0xd5: // pause 16-bit dma
m_timer->adjust(attotime::never, 0);
drq16_w(0); // drop DRQ
m_dsp.dma_throttled = false;
m_dsp.dma_timer_started = false;
break;
case 0xd6: // resume 16-bit dma
logerror("SB: 16-bit dma resume\n");
break;
case 0xd9: // stop 16-bit autoinit
m_dsp.dma_autoinit = 0;
break;
case 0xb0:
case 0xb6:
case 0xc0:
case 0xc6:
mode = m_dsp.fifo[1];
m_dsp.flags = 0;
m_dsp.dma_length = (m_dsp.fifo[2] + (m_dsp.fifo[3]<<8)) + 1;
if((cmd & 0xf0) == 0xb0)
{
m_dsp.flags |= SIXTEENBIT;
m_dsp.dma_length <<= 1;
drq16_w(1);
}
else
drq_w(1);
if(cmd & 0x04)
m_dsp.dma_autoinit = 1;
if(mode & 0x10)
m_dsp.flags |= SIGNED;
if(mode & 0x20)
{
m_dsp.flags |= STEREO;
m_dsp.dma_length <<= 1;
}
m_dsp.dma_transferred = 0;
m_dsp.dma_timer_started = false;
m_dsp.dma_throttled = false;
break;
case 0xb8:
case 0xbe:
case 0xc8:
case 0xce:
mode = m_dsp.fifo[1];
m_dsp.adc_length = (m_dsp.fifo[2] + (m_dsp.fifo[3]<<8)) + 1;
m_dsp.adc_transferred = 0;
if(cmd & 0x04)
m_dsp.dma_autoinit = 1;
if(mode & 0x20)
m_dsp.adc_length <<= 1;
if((cmd & 0xf0) == 0xb0)
{
m_dsp.adc_length <<= 1;
drq16_w(1);
}
else
drq_w(1);
logerror("SB: ADC capture unimplemented\n");
break;
case 0xf3: // send PIC irq
irq_w(1, IRQ_DMA16);
break;
case 0xfc:
queue_r((((m_dsp.flags & SIXTEENBIT) && m_dsp.dma_autoinit) << 4) | ((!(m_dsp.flags & SIXTEENBIT) && m_dsp.dma_autoinit) << 2));
break;
}
}
}
m_dsp.fifo_ptr = 0;
}
}
WRITE8_MEMBER(sb_device::dsp_cmd_w)
{
// printf("%02x to DSP command @ %x\n", data, offset);
if(offset)
return;
if (m_uart_midi || m_onebyte_midi)
{
xmit_char(data);
m_onebyte_midi = false; // clear onebyte (if this is uart, that's harmless)
return;
}
queue(data);
process_fifo(m_dsp.fifo[0]);
}
void sb_device::adpcm_decode(UINT8 sample, int size)
{
const UINT8 adpcm_2_table[] = {0, 1, 1, 3, 2, 6, 4, 12, 8, 24, 16, 48};
const UINT8 step_2_table[] = {0, 2, 0, 4, 2, 6, 4, 8, 6, 10, 8, 10};
const UINT8 adpcm_3_table[] = {0, 1, 2, 3, 1, 3, 5, 7,
2, 6, 10, 14, 4, 12, 20, 28,
8, 24, 40, 56};
const UINT8 step_3_table[] = {0, 0, 0, 4, 0, 4, 4, 8,
4, 8, 8, 12, 8, 12, 12, 16,
12, 16, 16, 16};
const UINT8 adpcm_4_table[] = {0, 1, 2, 3, 4, 5, 6, 7,
1, 3, 5, 7, 9, 11, 13, 15,
2, 6, 10, 14, 18, 22, 26, 30,
4, 12, 20, 28, 36, 44, 52, 60};
const UINT8 step_4_table[] = {0, 0, 0, 0, 0, 8, 8, 8,
0, 8, 8, 8, 8, 16, 16, 16,
8, 16, 16, 16, 16, 24, 24, 24,
16, 24, 24, 24, 24, 24, 24, 24};
INT16 dec_sample = m_dsp.adpcm_ref;
UINT8 index;
switch(size)
{
case 2:
index = (sample & 1) | m_dsp.adpcm_step;
dec_sample += ((sample & 2)?-1:1) * adpcm_2_table[index];
m_dsp.adpcm_step = step_2_table[index];
break;
case 3:
index = (sample & 3) | m_dsp.adpcm_step;
dec_sample += ((sample & 4)?-1:1) * adpcm_3_table[index];
m_dsp.adpcm_step = step_3_table[index];
break;
case 4:
index = (sample & 7) | m_dsp.adpcm_step;
dec_sample += ((sample & 8)?-1:1) * adpcm_4_table[index];
m_dsp.adpcm_step = step_4_table[index];
break;
}
if(dec_sample > 255)
dec_sample = 255;
else if(dec_sample < 0)
dec_sample = 0;
m_dsp.adpcm_ref = dec_sample;
m_dacl->write_unsigned8(m_dsp.adpcm_ref);
m_dacr->write_unsigned8(m_dsp.adpcm_ref);
}
READ8_MEMBER( sb16_device::mpu401_r )
{
UINT8 res;
irq_w(0, IRQ_MPU);
if(offset == 0) // data
{
res = m_recvring[m_recv_read++];
if (m_recv_read >= MIDI_RING_SIZE)
{
m_recv_read = 0;
}
if (m_rx_waiting)
{
m_rx_waiting--;
}
}
else // status
{
res = 0;
if (m_tx_waiting >= MIDI_RING_SIZE)
{
res |= 0x40; // tx full
}
if (m_rx_waiting == 0)
{
res |= 0x80; // rx empty
}
}
return res;
}
WRITE8_MEMBER( sb16_device::mpu401_w )
{
if(offset == 0) // data
{
logerror("SB MPU401:%02x %02x\n",offset,data);
if (m_mpu_midi)
{
xmit_char(data);
}
}
else // command
{
logerror("SB MPU401:%02x %02x\n",offset,data);
switch(data)
{
case 0x3f: // enter MPU-401 UART mode
irq_w(1, IRQ_MPU);
m_recv_read = m_recv_write = 0;
m_xmit_read = m_xmit_write = m_tx_waiting = 0;
m_recvring[m_recv_write++] = 0xfe;
m_rx_waiting = 1;
m_mpu_midi = true;
break;
case 0xff: // reset
irq_w(1, IRQ_MPU);
m_recv_read = m_recv_write = 0;
m_recvring[m_recv_write++] = 0xfe;
m_rx_waiting = 1;
m_mpu_midi = false;
break;
}
}
}
void sb16_device::mixer_set()
{
ymf262_device *ymf = subdevice<ymf262_device>("ymf262");
float lmain = m_mixer.main_vol[0]/248.0;
float rmain = m_mixer.main_vol[1]/248.0;
m_dacl->set_output_gain(ALL_OUTPUTS, lmain*(m_mixer.dac_vol[0]/248.0));
m_dacr->set_output_gain(ALL_OUTPUTS, rmain*(m_mixer.dac_vol[1]/248.0));
ymf->set_output_gain(0, lmain*(m_mixer.fm_vol[0]/248.0));
ymf->set_output_gain(1, rmain*(m_mixer.fm_vol[1]/248.0));
ymf->set_output_gain(2, lmain*(m_mixer.fm_vol[0]/248.0));
ymf->set_output_gain(3, rmain*(m_mixer.fm_vol[1]/248.0));
}
void sb16_device::mixer_reset()
{
m_mixer.status = 0x80;
m_mixer.main_vol[0] = 0xc0;
m_mixer.main_vol[1] = 0xc0;
m_mixer.dac_vol[0] = 0xc0;
m_mixer.dac_vol[1] = 0xc0;
m_mixer.fm_vol[0] = 0xc0;
m_mixer.fm_vol[1] = 0xc0;
m_mixer.cd_vol[0] = 0x00;
m_mixer.cd_vol[1] = 0x00;
m_mixer.line_vol[0] = 0x00;
m_mixer.line_vol[1] = 0x00;
m_mixer.mic_vol = 0x00;
m_mixer.pc_speaker_vol = 0x00;
m_mixer.output_ctl = 0x1f;
m_mixer.input_ctl[0] = 0x15;
m_mixer.input_ctl[1] = 0x0b;
m_mixer.input_gain[0] = 0x00;
m_mixer.input_gain[1] = 0x00;
m_mixer.output_gain[0] = 0x00;
m_mixer.output_gain[1] = 0x00;
m_mixer.agc = 0x00;
m_mixer.treble[0] = 0x80;
m_mixer.treble[1] = 0x80;
m_mixer.bass[0] = 0x80;
m_mixer.bass[1] = 0x80;
mixer_set();
}
READ8_MEMBER( sb16_device::mixer_r )
{
if(offset == 0)
return m_mixer.status;
return m_mixer.data;
}
WRITE8_MEMBER( sb16_device::mixer_w )
{
if(offset == 0)
{
switch(data)
{
case 0x00:
mixer_reset();
return;
case 0x01:
m_mixer.data = m_mixer.status;
break;
case 0x04:
m_mixer.data = (m_mixer.dac_vol[0] & 0xf0) | (m_mixer.dac_vol[1] >> 4);
break;
case 0x0a:
m_mixer.data = m_mixer.mic_vol >> 5;
break;
case 0x22:
m_mixer.data = (m_mixer.main_vol[0] & 0xf0) | (m_mixer.main_vol[1] >> 4);
break;
case 0x26:
m_mixer.data = (m_mixer.fm_vol[0] & 0xf0) | (m_mixer.fm_vol[1] >> 4);
break;
case 0x28:
m_mixer.data = (m_mixer.cd_vol[0] & 0xf0) | (m_mixer.cd_vol[1] >> 4);
break;
case 0x2e:
m_mixer.data = (m_mixer.line_vol[0] & 0xf0) | (m_mixer.line_vol[1] >> 4);
break;
case 0x30:
case 0x31:
m_mixer.data = m_mixer.main_vol[data & 1];
break;
case 0x32:
case 0x33:
m_mixer.data = m_mixer.dac_vol[data & 1];
break;
case 0x34:
case 0x35:
m_mixer.data = m_mixer.fm_vol[data & 1];
break;
case 0x36:
case 0x37:
m_mixer.data = m_mixer.cd_vol[data & 1];
break;
case 0x38:
case 0x39:
m_mixer.data = m_mixer.line_vol[data & 1];
break;
case 0x3a:
m_mixer.data = m_mixer.mic_vol;
break;
case 0x3b:
m_mixer.data = m_mixer.pc_speaker_vol;
break;
case 0x3c:
m_mixer.data = m_mixer.output_ctl;
break;
case 0x3d:
case 0x3e:
m_mixer.data = m_mixer.input_ctl[(data + 1) & 1];
break;
case 0x3f:
case 0x40:
m_mixer.data = m_mixer.input_gain[(data + 1) & 1];
break;
case 0x41:
case 0x42:
m_mixer.data = m_mixer.output_gain[(data + 1) & 1];
break;
case 0x43:
m_mixer.data = m_mixer.agc;
break;
case 0x44:
case 0x45:
m_mixer.data = m_mixer.treble[data & 1];
break;
case 0x46:
case 0x47:
m_mixer.data = m_mixer.bass[data & 1];
break;
case 0x80:
m_mixer.data = 0x12; // irq5
break;
case 0x81:
m_mixer.data = 0x22; // dma1&5
break;
case 0x82:
m_mixer.data = m_dsp.irq_active | 0x20;
break;
default:
logerror("SB: Unimplemented mixer index %02x\n", data);
m_mixer.status = data | 0x80;
m_mixer.data = 0x0a;
return;
}
m_mixer.status = data;
return;
}
switch(m_mixer.status)
{
case 0x04:
m_mixer.dac_vol[0] = (data & 0xf0) | 8;
m_mixer.dac_vol[1] = (data << 4) | 8;
break;
case 0x0a:
m_mixer.mic_vol = (data << 5) | 0x18;
break;
case 0x22:
m_mixer.main_vol[0] = (data & 0xf0) | 8;
m_mixer.main_vol[1] = (data << 4) | 8;
break;
case 0x26:
m_mixer.fm_vol[0] = (data & 0xf0) | 8;
m_mixer.fm_vol[1] = (data << 4) | 8;
break;
case 0x28:
m_mixer.cd_vol[0] = (data & 0xf0) | 8;
m_mixer.cd_vol[1] = (data << 4) | 8;
break;
case 0x2e:
m_mixer.line_vol[0] = (data & 0xf0) | 8;
m_mixer.line_vol[1] = (data << 4) | 8;
break;
case 0x30:
case 0x31:
m_mixer.main_vol[m_mixer.status & 1] = data & 0xf8;
break;
case 0x32:
case 0x33:
m_mixer.dac_vol[m_mixer.status & 1] = data & 0xf8;
break;
case 0x34:
case 0x35:
m_mixer.fm_vol[m_mixer.status & 1] = data & 0xf8;
break;
case 0x36:
case 0x37:
m_mixer.cd_vol[m_mixer.status & 1] = data & 0xf8;
break;
case 0x38:
case 0x39:
m_mixer.line_vol[m_mixer.status & 1] = data & 0xf8;
break;
case 0x3a:
m_mixer.mic_vol = data & 0xf8;
break;
case 0x3b:
m_mixer.pc_speaker_vol = data & 0xc0;
break;
case 0x3c:
m_mixer.output_ctl = data & 0x1f;
break;
case 0x3d:
case 0x3e:
m_mixer.input_ctl[(m_mixer.status + 1) & 1] = data & 0x7f;
break;
case 0x3f:
case 0x40:
m_mixer.input_gain[(m_mixer.status + 1) & 1] = data & 0xc0;
break;
case 0x41:
case 0x42:
m_mixer.output_gain[(m_mixer.status + 1) & 1] = data & 0xc0;
break;
case 0x43:
m_mixer.agc = data & 1;
break;
case 0x44:
case 0x45:
m_mixer.treble[m_mixer.status & 1] = data & 0xf0;
break;
case 0x46:
case 0x47:
m_mixer.bass[m_mixer.status & 1] = data & 0xf0;
break;
case 0x80:
case 0x81:
// don't support these yet
break;
default:
return;
}
m_mixer.data = data;
mixer_set();
return;
}
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type ISA8_SOUND_BLASTER_1_0 = &device_creator<isa8_sblaster1_0_device>;
const device_type ISA8_SOUND_BLASTER_1_5 = &device_creator<isa8_sblaster1_5_device>;
const device_type ISA16_SOUND_BLASTER_16 = &device_creator<isa16_sblaster16_device>;
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor isa8_sblaster1_0_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( sblaster1_0_config );
}
machine_config_constructor isa8_sblaster1_5_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( sblaster1_5_config );
}
machine_config_constructor isa16_sblaster16_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( sblaster_16_config );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
sb_device::sb_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, UINT32 clock, const char *name) :
device_t(mconfig, type, name, tag, owner, clock),
device_serial_interface(mconfig, *this),
m_dacl(*this, "sbdacl"),
m_dacr(*this, "sbdacr"),
m_joy(*this, "joy"),
m_mdout(*this, "mdout")
{
}
sb8_device::sb8_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, UINT32 clock, const char *name) :
sb_device(mconfig, type, tag, owner, clock, name),
device_isa8_card_interface(mconfig, *this)
{
}
sb16_device::sb16_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, UINT32 clock, const char *name) :
sb_device(mconfig, type, tag, owner, clock, name),
device_isa16_card_interface(mconfig, *this)
{
}
//-------------------------------------------------
// isa8_sblaster_device - constructor
//-------------------------------------------------
isa8_sblaster1_0_device::isa8_sblaster1_0_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
sb8_device(mconfig, ISA8_SOUND_BLASTER_1_0, tag, owner, clock, "Sound Blaster 1.0")
{
}
isa8_sblaster1_5_device::isa8_sblaster1_5_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
sb8_device(mconfig, ISA8_SOUND_BLASTER_1_5, tag, owner, clock, "Sound Blaster 1.5")
{
}
isa16_sblaster16_device::isa16_sblaster16_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
sb16_device(mconfig, ISA16_SOUND_BLASTER_16, tag, owner, clock, "Sound Blaster 16")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void sb8_device::device_start()
{
m_isa->install_device( 0x0200, 0x0207, 0, 0, read8_delegate(FUNC(pc_joy_device::joy_port_r), subdevice<pc_joy_device>("joy")), write8_delegate(FUNC(pc_joy_device::joy_port_w), subdevice<pc_joy_device>("joy")));
m_isa->install_device( 0x0226, 0x0227, 0, 0, read8_delegate(FUNC(sb_device::dsp_reset_r), this), write8_delegate(FUNC(sb_device::dsp_reset_w), this));
m_isa->install_device( 0x022a, 0x022b, 0, 0, read8_delegate(FUNC(sb_device::dsp_data_r), this), write8_delegate(FUNC(sb_device::dsp_data_w), this) );
m_isa->install_device( 0x022c, 0x022d, 0, 0, read8_delegate(FUNC(sb_device::dsp_wbuf_status_r), this), write8_delegate(FUNC(sb_device::dsp_cmd_w), this) );
m_isa->install_device( 0x022e, 0x022f, 0, 0, read8_delegate(FUNC(sb_device::dsp_rbuf_status_r), this), write8_delegate(FUNC(sb_device::dsp_rbuf_status_w), this) );
if(m_dsp.version >= 0x0301)
{
//m_isa->install_device(0x0224, 0x0225, 0, 0, read8_delegate(FUNC(sb8_device::mixer_r), this), write8_delegate(FUNC(sb8_device::mixer_w), this));
m_isa->install_device(subdevice("ymf262"), 0x0388, 0x038b, 0, 0, FUNC(ymf262_r), FUNC(ymf262_w) );
m_isa->install_device(subdevice("ymf262"), 0x0220, 0x0223, 0, 0, FUNC(ymf262_r), FUNC(ymf262_w) );
m_isa->install_device(subdevice("ymf262"), 0x0228, 0x0229, 0, 0, FUNC(ymf262_r), FUNC(ymf262_w) );
}
else
{
m_isa->install_device(subdevice("ym3812"), 0x0388, 0x0389, 0, 0, FUNC(ym3812_16_r), FUNC(ym3812_16_w) );
m_isa->install_device(subdevice("ym3812"), 0x0228, 0x0229, 0, 0, FUNC(ym3812_16_r), FUNC(ym3812_16_w) );
}
m_timer = timer_alloc(0, NULL);
save_item(NAME(m_dack_out));
save_item(NAME(m_onebyte_midi));
save_item(NAME(m_uart_midi));
save_item(NAME(m_uart_irq));
save_item(NAME(m_mpu_midi));
save_item(NAME(m_rx_waiting));
save_item(NAME(m_tx_waiting));
save_item(NAME(m_recvring));
save_item(NAME(m_xmitring));
save_item(NAME(m_xmit_read));
save_item(NAME(m_xmit_write));
save_item(NAME(m_recv_read));
save_item(NAME(m_recv_write));
save_item(NAME(m_tx_busy));
}
void isa8_sblaster1_0_device::device_start()
{
set_isa_device();
// 1.0 always has the SAA1099s for CMS back-compatibility
m_isa->install_device(subdevice("saa1099.1"), 0x0220, 0x0221, 0, 0, FUNC(saa1099_16_r), FUNC(saa1099_16_w) );
m_isa->install_device(subdevice("saa1099.2"), 0x0222, 0x0223, 0, 0, FUNC(saa1099_16_r), FUNC(saa1099_16_w) );
m_isa->set_dma_channel(1, this, FALSE);
m_dsp.version = 0x0105;
sb8_device::device_start();
}
void isa8_sblaster1_5_device::device_start()
{
set_isa_device();
/* 1.5 makes CM/S support optional (empty sockets, but they work if the user populates them!) */
m_isa->set_dma_channel(1, this, FALSE);
m_dsp.version = 0x0200;
sb8_device::device_start();
}
void sb16_device::device_start()
{
m_isa->install_device( 0x0200, 0x0207, 0, 0, read8_delegate(FUNC(pc_joy_device::joy_port_r), subdevice<pc_joy_device>("joy")), write8_delegate(FUNC(pc_joy_device::joy_port_w), subdevice<pc_joy_device>("joy")));
m_isa->install_device( 0x0224, 0x0225, 0, 0, read8_delegate(FUNC(sb16_device::mixer_r), this), write8_delegate(FUNC(sb16_device::mixer_w), this));
m_isa->install_device( 0x0226, 0x0227, 0, 0, read8_delegate(FUNC(sb_device::dsp_reset_r), this), write8_delegate(FUNC(sb_device::dsp_reset_w), this));
m_isa->install_device( 0x022a, 0x022b, 0, 0, read8_delegate(FUNC(sb_device::dsp_data_r), this), write8_delegate(FUNC(sb_device::dsp_data_w), this) );
m_isa->install_device( 0x022c, 0x022d, 0, 0, read8_delegate(FUNC(sb_device::dsp_wbuf_status_r), this), write8_delegate(FUNC(sb_device::dsp_cmd_w), this) );
m_isa->install_device( 0x022e, 0x022f, 0, 0, read8_delegate(FUNC(sb_device::dsp_rbuf_status_r), this), write8_delegate(FUNC(sb_device::dsp_rbuf_status_w), this) );
m_isa->install_device( 0x0330, 0x0331, 0, 0, read8_delegate(FUNC(sb16_device::mpu401_r), this), write8_delegate(FUNC(sb16_device::mpu401_w), this));
m_isa->install_device(subdevice("ymf262"), 0x0388, 0x038b, 0, 0, FUNC(ymf262_r), FUNC(ymf262_w) );
m_isa->install_device(subdevice("ymf262"), 0x0220, 0x0223, 0, 0, FUNC(ymf262_r), FUNC(ymf262_w) );
m_isa->install_device(subdevice("ymf262"), 0x0228, 0x0229, 0, 0, FUNC(ymf262_r), FUNC(ymf262_w) );
m_timer = timer_alloc(0, NULL);
save_item(NAME(m_mixer.data));
save_item(NAME(m_mixer.status));
save_item(NAME(m_mixer.main_vol));
save_item(NAME(m_mixer.dac_vol));
save_item(NAME(m_mixer.fm_vol));
save_item(NAME(m_mixer.cd_vol));
save_item(NAME(m_mixer.line_vol));
save_item(NAME(m_mixer.mic_vol));
save_item(NAME(m_mixer.pc_speaker_vol));
save_item(NAME(m_mixer.output_ctl));
save_item(NAME(m_mixer.input_ctl));
save_item(NAME(m_mixer.input_gain));
save_item(NAME(m_mixer.output_gain));
save_item(NAME(m_mixer.agc));
save_item(NAME(m_mixer.treble));
save_item(NAME(m_mixer.bass));
}
void isa16_sblaster16_device::device_start()
{
set_isa_device();
m_isa->set_dma_channel(1, this, FALSE);
m_isa->set_dma_channel(5, this, FALSE);
m_dsp.version = 0x0405; // diagnose.exe rejects anything lower than 0x0402
sb16_device::device_start();
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void sb_device::device_reset()
{
m_dsp.prot_value = 0xaa;
m_dsp.prot_count = 0;
m_dack_out = 0;
m_dsp.fifo_ptr = 0;
m_dsp.fifo_r_ptr = 0;
m_dsp.wbuf_status = 0;
m_dsp.rbuf_status = 0;
m_dsp.frequency = 8000; // per stereo-fx
m_dsp.irq_active = 0;
m_dsp.dma_no_irq = false;
mixer_reset();
m_onebyte_midi = false;
m_uart_midi = false;
m_uart_irq = false;
m_mpu_midi = false;
m_tx_busy = false;
m_xmit_read = m_xmit_write = 0;
m_recv_read = m_recv_write = 0;
m_rx_waiting = m_tx_waiting = 0;
// MIDI is 31250 baud, 8-N-1
set_rcv_rate(31250);
set_tra_rate(31250);
set_data_frame(8, 1, SERIAL_PARITY_NONE);
}
UINT8 sb_device::dack_r(int line)
{
m_dsp.adc_transferred++;
if(m_dsp.adc_transferred >= m_dsp.adc_length)
{
drq_w(0);
if (m_dsp.dma_autoinit)
{
m_dsp.adc_transferred = 0;
drq_w(1);
}
else
m_dsp.wbuf_status = 0;
if(!m_dsp.dma_no_irq)
irq_w(1, IRQ_DMA8);
else
m_dsp.dma_no_irq = false;
}
else
drq_w(1);
return m_dack_out;
}
UINT16 sb16_device::dack16_r(int line)
{
m_dsp.adc_transferred += 2;
if (m_dsp.adc_transferred >= m_dsp.adc_length)
{
drq16_w(0);
if (m_dsp.dma_autoinit)
{
m_dsp.adc_transferred = 0;
drq16_w(1);
}
irq_w(1, IRQ_DMA16);
}
else
drq16_w(1);
return m_dack_out;
}
void sb16_device::dack16_w(int line, UINT16 data)
{
// set the transfer timer on the 1st byte
if (!m_dsp.dma_timer_started)
{
m_timer->adjust(attotime::from_hz((double)m_dsp.frequency), 0, attotime::from_hz((double)m_dsp.frequency));
m_dsp.d_rptr = m_dsp.d_wptr = 0;
m_dsp.dma_timer_started = true;
}
m_dsp.data[m_dsp.d_wptr++] = data & 0xff;
m_dsp.data[m_dsp.d_wptr++] = data >> 8;
m_dsp.d_wptr %= 128;
if (m_dsp.d_wptr == m_dsp.d_rptr)
{
// printf("throttling DRQ\n");
drq16_w(0); // drop DRQ here
m_dsp.dma_throttled = true;
}
m_dsp.dma_transferred += 2;
if (m_dsp.dma_transferred >= m_dsp.dma_length)
{
// printf("DMA fill completed (%d out of %d)\n", m_dsp.dma_transferred, m_dsp.dma_length);
drq16_w(0); // drop DRQ here
if (m_dsp.dma_autoinit)
{
// printf("autoinit reset\n");
m_dsp.dma_transferred = 0;
if (!m_dsp.dma_throttled) // if we're not throttled, re-raise DRQ right now
{
drq16_w(1); // raise DRQ again (page 3-15 of the Creative manual indicates auto-init will keep going until you stop it)
}
}
irq_w(1, IRQ_DMA16); // raise IRQ as per the Creative manual
}
}
/* TODO: this mustn't be instant! */
void sb_device::dack_w(int line, UINT8 data)
{
// printf("dack_w: line %x data %02x\n", line, data);
// if(data != 0x80)
// printf("%02x\n",data);
// set the transfer timer on the 1st byte
if (!m_dsp.dma_timer_started)
{
m_timer->adjust(attotime::from_hz((double)m_dsp.frequency), 0, attotime::from_hz((double)m_dsp.frequency));
m_dsp.d_rptr = m_dsp.d_wptr = 0;
m_dsp.dma_timer_started = true;
}
m_dsp.data[m_dsp.d_wptr++] = data;
m_dsp.d_wptr %= 128;
if (m_dsp.d_wptr == m_dsp.d_rptr)
{
// printf("throttling DRQ\n");
drq_w(0); // drop DRQ here
m_dsp.dma_throttled = true;
}
m_dsp.dma_transferred++;
if (m_dsp.dma_transferred >= m_dsp.dma_length)
{
// printf("DMA fill completed (%d out of %d)\n", m_dsp.dma_transferred, m_dsp.dma_length);
drq_w(0); // drop DRQ here
if (m_dsp.dma_autoinit)
{
// printf("autoinit reset\n");
m_dsp.dma_transferred = 0;
if (!m_dsp.dma_throttled) // if we're not throttled, re-raise DRQ right now
{
drq_w(1); // raise DRQ again (page 3-15 of the Creative manual indicates auto-init will keep going until you stop it)
}
}
irq_w(1, IRQ_DMA8); // raise IRQ as per the Creative manual
}
}
void sb_device::device_timer(emu_timer &timer, device_timer_id tid, int param, void *ptr)
{
// printf("DMA timer expire\n");
UINT16 lsample, rsample;
switch (m_dsp.flags) {
case 0: // 8-bit unsigned mono
m_dacl->write_unsigned8(m_dsp.data[m_dsp.d_rptr]);
m_dacr->write_unsigned8(m_dsp.data[m_dsp.d_rptr]);
m_dsp.data[m_dsp.d_rptr++] = 0x80;
break;
case SIGNED: // 8-bit signed mono
m_dacl->write_unsigned8(m_dsp.data[m_dsp.d_rptr] + 128);
m_dacr->write_unsigned8(m_dsp.data[m_dsp.d_rptr] + 128);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
break;
case STEREO: // 8-bit unsigned stereo
m_dacl->write_unsigned8(m_dsp.data[m_dsp.d_rptr]);
m_dsp.data[m_dsp.d_rptr++] = 0x80;
m_dacr->write_unsigned8(m_dsp.data[m_dsp.d_rptr]);
m_dsp.data[m_dsp.d_rptr++] = 0x80;
break;
case SIGNED | STEREO: // 8-bit signed stereo
m_dacl->write_unsigned8(m_dsp.data[m_dsp.d_rptr] + 128);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dacr->write_unsigned8(m_dsp.data[m_dsp.d_rptr] + 128);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
break;
case SIXTEENBIT: // 16-bit unsigned mono
lsample = m_dsp.data[m_dsp.d_rptr] | (m_dsp.data[m_dsp.d_rptr+1] << 8);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dsp.data[m_dsp.d_rptr++] = 0x80;
m_dacl->write_unsigned16(lsample);
m_dacr->write_unsigned16(lsample);
break;
case SIXTEENBIT | SIGNED: // 16-bit signed mono
lsample = m_dsp.data[m_dsp.d_rptr] | (m_dsp.data[m_dsp.d_rptr+1] << 8);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dacl->write_unsigned16(lsample + 32768);
m_dacr->write_unsigned16(lsample + 32768);
break;
case SIXTEENBIT | STEREO: // 16-bit unsigned stereo
lsample = m_dsp.data[m_dsp.d_rptr] | (m_dsp.data[m_dsp.d_rptr+1] << 8);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dsp.data[m_dsp.d_rptr++] = 0x80;
m_dsp.d_rptr %= 128;
rsample = m_dsp.data[m_dsp.d_rptr] | (m_dsp.data[m_dsp.d_rptr+1] << 8);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dsp.data[m_dsp.d_rptr++] = 0x80;
m_dacl->write_unsigned16(lsample);
m_dacr->write_unsigned16(rsample);
break;
case SIXTEENBIT | SIGNED | STEREO: // 16-bit signed stereo
lsample = m_dsp.data[m_dsp.d_rptr] | (m_dsp.data[m_dsp.d_rptr+1] << 8);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dsp.d_rptr %= 128;
rsample = m_dsp.data[m_dsp.d_rptr] | (m_dsp.data[m_dsp.d_rptr+1] << 8);
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dsp.data[m_dsp.d_rptr++] = 0x00;
m_dacl->write_unsigned16(lsample + 32768);
m_dacr->write_unsigned16(rsample + 32768);
break;
case ADPCM2:
if(m_dsp.adpcm_new_ref)
{
m_dsp.adpcm_ref = m_dsp.data[m_dsp.d_rptr++];
m_dsp.adpcm_new_ref = false;
m_dacl->write_unsigned8(m_dsp.adpcm_ref);
m_dacr->write_unsigned8(m_dsp.adpcm_ref);
break;
}
lsample = m_dsp.data[m_dsp.d_rptr];
switch(m_dsp.adpcm_count++)
{
case 0:
adpcm_decode(lsample >> 6, 2);
break;
case 1:
adpcm_decode((lsample >> 4) & 3, 2);
break;
case 2:
adpcm_decode((lsample >> 2) & 3, 2);
break;
case 3:
adpcm_decode(lsample & 3, 2);
m_dsp.data[m_dsp.d_rptr++] = 0x80;
m_dsp.adpcm_count = 0;
break;
}
break;
case ADPCM3:
if(m_dsp.adpcm_new_ref)
{
m_dsp.adpcm_ref = m_dsp.data[m_dsp.d_rptr++];
m_dsp.adpcm_new_ref = false;
m_dacl->write_unsigned8(m_dsp.adpcm_ref);
m_dacr->write_unsigned8(m_dsp.adpcm_ref);
break;
}
lsample = m_dsp.data[m_dsp.d_rptr];
switch(m_dsp.adpcm_count++)
{
case 0:
adpcm_decode(lsample >> 5, 3);
break;
case 1:
adpcm_decode((lsample >> 2) & 7, 3);
break;
case 2:
adpcm_decode(((lsample & 2) << 1) | (lsample & 1), 3);
m_dsp.data[m_dsp.d_rptr++] = 0x80;
m_dsp.adpcm_count = 0;
break;
}
break;
case ADPCM4:
if(m_dsp.adpcm_new_ref)
{
m_dsp.adpcm_ref = m_dsp.data[m_dsp.d_rptr++];
m_dsp.adpcm_new_ref = false;
m_dacl->write_unsigned8(m_dsp.adpcm_ref);
m_dacr->write_unsigned8(m_dsp.adpcm_ref);
break;
}
lsample = m_dsp.data[m_dsp.d_rptr];
switch(m_dsp.adpcm_count++)
{
case 0:
adpcm_decode(lsample >> 4, 4);
break;
case 1:
adpcm_decode(lsample & 15, 4);
m_dsp.data[m_dsp.d_rptr++] = 0x80;
m_dsp.adpcm_count = 0;
break;
}
break;
default:
logerror("SB: unimplemented sample type %x\n", m_dsp.flags);
}
m_dsp.d_rptr %= 128;
if (m_dsp.dma_throttled)
{
if (m_dsp.d_rptr == m_dsp.d_wptr)
{
// printf("unthrottling DRQ\n");
if(m_dsp.flags & SIXTEENBIT) // 16-bit audio through 8-bit dma?
drq16_w(1);
else
drq_w(1); // raise DRQ
m_dsp.dma_throttled = false;
}
}
}
void sb_device::rcv_complete() // Rx completed receiving byte
{
receive_register_extract();
UINT8 data = get_received_char();
// in UART MIDI mode, we set the DMA8 IRQ on receiving a character
if (m_uart_midi)
{
m_recvring[m_recv_write++] = data;
if (m_recv_write >= MIDI_RING_SIZE)
{
m_recv_write = 0;
}
if (m_recv_write != m_recv_read)
{
m_rx_waiting++;
}
if (m_uart_irq)
{
irq_w(1, IRQ_DMA8);
}
}
}
void sb16_device::rcv_complete() // Rx completed receiving byte
{
receive_register_extract();
UINT8 data = get_received_char();
// for UART or MPU, add character to the receive queue
if (m_uart_midi || m_mpu_midi)
{
m_recvring[m_recv_write++] = data;
if (m_recv_write >= MIDI_RING_SIZE)
{
m_recv_write = 0;
}
if (m_recv_write != m_recv_read)
{
m_rx_waiting++;
}
if (m_uart_irq)
{
irq_w(1, IRQ_DMA8);
}
if (m_mpu_midi)
{
irq_w(1, IRQ_MPU);
}
}
}
void sb_device::tra_complete() // Tx completed sending byte
{
// printf("Tx complete\n");
// is there more waiting to send?
if (m_tx_waiting)
{
transmit_register_setup(m_xmitring[m_xmit_read++]);
if (m_xmit_read >= MIDI_RING_SIZE)
{
m_xmit_read = 0;
}
m_tx_waiting--;
}
else
{
m_tx_busy = false;
}
}
void sb_device::tra_callback() // Tx send bit
{
int bit = transmit_register_get_data_bit();
m_mdout->tx(bit);
}
void sb_device::xmit_char(UINT8 data)
{
// printf("SB: xmit %02x\n", data);
// if tx is busy it'll pick this up automatically when it completes
if (!m_tx_busy)
{
m_tx_busy = true;
transmit_register_setup(data);
}
else
{
// tx is busy, it'll pick this up next time
m_xmitring[m_xmit_write++] = data;
if (m_xmit_write >= MIDI_RING_SIZE)
{
m_xmit_write = 0;
}
m_tx_waiting++;
}
}
Reference in New Issue View Git Blame Copy Permalink