/*************************************************************************** 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 "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 MACHINE_CONFIG_FRAGMENT( sblaster1_0_config ) MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker") MCFG_SOUND_ADD("ym3812", YM3812, ym3812_StdClock) 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("pc_joy") MCFG_MIDI_PORT_ADD("mdin", midiin_slot, "midiin") MCFG_MIDI_RX_HANDLER(DEVWRITELINE(DEVICE_SELF, sb_device, midi_rx_w)) MCFG_MIDI_PORT_ADD("mdout", midiout_slot, "midiout") 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_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("pc_joy") MCFG_MIDI_PORT_ADD("mdin", midiin_slot, "midiin") MCFG_MIDI_RX_HANDLER(DEVWRITELINE(DEVICE_SELF, sb_device, midi_rx_w)) MCFG_MIDI_PORT_ADD("mdout", midiout_slot, "midiout") 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_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("pc_joy") MCFG_MIDI_PORT_ADD("mdin", midiin_slot, "midiin") MCFG_MIDI_RX_HANDLER(DEVWRITELINE(DEVICE_SELF, sb_device, midi_rx_w)) MCFG_MIDI_PORT_ADD("mdout", midiout_slot, "midiout") MACHINE_CONFIG_END static READ8_DEVICE_HANDLER( ym3812_16_r ) { ym3812_device *ym3812 = (ym3812_device *) device; UINT8 retVal = 0xff; switch(offset) { case 0 : retVal = ym3812->status_port_r( space, offset ); break; } return retVal; } static WRITE8_DEVICE_HANDLER( ym3812_16_w ) { ym3812_device *ym3812 = (ym3812_device *) device; switch(offset) { case 0 : ym3812->control_port_w( space, offset, data ); break; case 1 : ym3812->write_port_w( 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(device)->saa1099_control_w( space, offset, data ); break; case 1 : dynamic_cast(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"); 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; const device_type ISA8_SOUND_BLASTER_1_5 = &device_creator; const device_type ISA16_SOUND_BLASTER_16 = &device_creator; //------------------------------------------------- // 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, const char *shortname, const char *source) : device_t(mconfig, type, name, tag, owner, clock, shortname, source), device_serial_interface(mconfig, *this), m_dacl(*this, "sbdacl"), m_dacr(*this, "sbdacr"), m_joy(*this, "pc_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, const char *shortname, const char *source) : sb_device(mconfig, type, tag, owner, clock, name, shortname, source), 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, const char *shortname, const char *source) : sb_device(mconfig, type, tag, owner, clock, name, shortname, source), 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", "isa_sblaster1_0", __FILE__) { } 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", "isa_sblaster1_5", __FILE__) { } 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", "isa_sblaster_16", __FILE__) { } //------------------------------------------------- // 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")), write8_delegate(FUNC(pc_joy_device::joy_port_w), subdevice("pc_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) { ymf262_device *ymf262 = subdevice("ymf262"); m_isa->install_device(0x0388, 0x038b, 0, 0, read8_delegate(FUNC(ymf262_device::read), ymf262), write8_delegate(FUNC(ymf262_device::write), ymf262)); m_isa->install_device(0x0220, 0x0223, 0, 0, read8_delegate(FUNC(ymf262_device::read), ymf262), write8_delegate(FUNC(ymf262_device::write), ymf262)); m_isa->install_device(0x0228, 0x0229, 0, 0, read8_delegate(FUNC(ymf262_device::read), ymf262), write8_delegate(FUNC(ymf262_device::write), ymf262)); } 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() { ymf262_device *ymf262 = subdevice("ymf262"); m_isa->install_device(0x0200, 0x0207, 0, 0, read8_delegate(FUNC(pc_joy_device::joy_port_r), subdevice("pc_joy")), write8_delegate(FUNC(pc_joy_device::joy_port_w), subdevice("pc_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(0x0388, 0x038b, 0, 0, read8_delegate(FUNC(ymf262_device::read), ymf262), write8_delegate(FUNC(ymf262_device::write), ymf262)); m_isa->install_device(0x0220, 0x0223, 0, 0, read8_delegate(FUNC(ymf262_device::read), ymf262), write8_delegate(FUNC(ymf262_device::write), ymf262)); m_isa->install_device(0x0228, 0x0229, 0, 0, read8_delegate(FUNC(ymf262_device::read), ymf262), write8_delegate(FUNC(ymf262_device::write), ymf262)); 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_data_frame(1, 8, PARITY_NONE, STOP_BITS_1); set_rate(31250); } 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"); if (tid) { device_serial_interface::device_timer(timer, tid, param, ptr); return; } 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->write_txd(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++; } }