summaryrefslogtreecommitdiffstatshomepage
path: root/trunk/src/emu/sound/multipcm.c
diff options
context:
space:
mode:
Diffstat (limited to 'trunk/src/emu/sound/multipcm.c')
-rw-r--r--trunk/src/emu/sound/multipcm.c703
1 files changed, 703 insertions, 0 deletions
diff --git a/trunk/src/emu/sound/multipcm.c b/trunk/src/emu/sound/multipcm.c
new file mode 100644
index 00000000000..43c7a2b3a2f
--- /dev/null
+++ b/trunk/src/emu/sound/multipcm.c
@@ -0,0 +1,703 @@
+/*
+ * Sega System 32 Multi/Model 1/Model 2 custom PCM chip (315-5560) emulation.
+ *
+ * by Miguel Angel Horna (ElSemi) for Model 2 Emulator and MAME.
+ * Information by R.Belmont and the YMF278B (OPL4) manual.
+ *
+ * voice registers:
+ * 0: Pan
+ * 1: Index of sample
+ * 2: LSB of pitch (low 2 bits seem unused so)
+ * 3: MSB of pitch (ooooppppppppppxx) (o=octave (4 bit signed), p=pitch (10 bits), x=unused?
+ * 4: voice control: top bit = 1 for key on, 0 for key off
+ * 5: bit 0: 0: interpolate volume changes, 1: direct set volume,
+ bits 1-7 = volume attenuate (0=max, 7f=min)
+ * 6: LFO frequency + Phase LFO depth
+ * 7: Amplitude LFO size
+ *
+ * The first sample ROM contains a variable length table with 12
+ * bytes per instrument/sample. This is very similar to the YMF278B.
+ *
+ * The first 3 bytes are the offset into the file (big endian).
+ * The next 2 are the loop start offset into the file (big endian)
+ * The next 2 are the 2's complement of the total sample size (big endian)
+ * The next byte is LFO freq + depth (copied to reg 6 ?)
+ * The next 3 are envelope params (Attack, Decay1 and 2, sustain level, release, Key Rate Scaling)
+ * The next byte is Amplitude LFO size (copied to reg 7 ?)
+ *
+ * TODO
+ * - The YM278B manual states that the chip supports 512 instruments. The MultiPCM probably supports them
+ * too but the high bit position is unknown (probably reg 2 low bit). Any game use more than 256?
+ *
+ */
+
+#include "emu.h"
+#include "multipcm.h"
+
+//????
+#define MULTIPCM_CLOCKDIV (180.0)
+
+struct _Sample
+{
+ unsigned int Start;
+ unsigned int Loop;
+ unsigned int End;
+ unsigned char AR,DR1,DR2,DL,RR;
+ unsigned char KRS;
+ unsigned char LFOVIB;
+ unsigned char AM;
+};
+
+typedef enum {ATTACK,DECAY1,DECAY2,RELEASE} _STATE;
+ALLOW_SAVE_TYPE(_STATE); // allow save_item on a non-fundamental type
+struct _EG
+{
+ int volume; //
+ _STATE state;
+ int step;
+ //step vals
+ int AR; //Attack
+ int D1R; //Decay1
+ int D2R; //Decay2
+ int RR; //Release
+ int DL; //Decay level
+};
+
+struct _LFO
+{
+ unsigned short phase;
+ UINT32 phase_step;
+ int *table;
+ int *scale;
+};
+
+
+struct _SLOT
+{
+ unsigned char Num;
+ unsigned char Regs[8];
+ int Playing;
+ struct _Sample *Sample;
+ unsigned int Base;
+ unsigned int offset;
+ unsigned int step;
+ unsigned int Pan,TL;
+ unsigned int DstTL;
+ int TLStep;
+ signed int Prev;
+ struct _EG EG;
+ struct _LFO PLFO; //Phase lfo
+ struct _LFO ALFO; //AM lfo
+};
+
+typedef struct _MultiPCM MultiPCM;
+struct _MultiPCM
+{
+ sound_stream * stream;
+ struct _Sample Samples[0x200]; //Max 512 samples
+ struct _SLOT Slots[28];
+ unsigned int CurSlot;
+ unsigned int Address;
+ unsigned int BankR,BankL;
+ float Rate;
+ INT8 *ROM;
+ //I include these in the chip because they depend on the chip clock
+ unsigned int ARStep[0x40],DRStep[0x40]; //Envelope step table
+ unsigned int FNS_Table[0x400]; //Frequency step table
+};
+
+
+static signed int LPANTABLE[0x800],RPANTABLE[0x800];
+
+#define FIX(v) ((UINT32) ((float) (1<<SHIFT)*(v)))
+
+static const int val2chan[] =
+{
+ 0, 1, 2, 3, 4, 5, 6 , -1,
+ 7, 8, 9, 10,11,12,13, -1,
+ 14,15,16,17,18,19,20, -1,
+ 21,22,23,24,25,26,27, -1,
+};
+
+
+#define SHIFT 12
+
+
+#define MULTIPCM_RATE 44100.0
+
+
+INLINE MultiPCM *get_safe_token(device_t *device)
+{
+ assert(device != NULL);
+ assert(device->type() == MULTIPCM);
+ return (MultiPCM *)downcast<legacy_device_base *>(device)->token();
+}
+
+
+/*******************************
+ ENVELOPE SECTION
+*******************************/
+
+//Times are based on a 44100Hz timebase. It's adjusted to the actual sampling rate on startup
+
+static const double BaseTimes[64]={0,0,0,0,6222.95,4978.37,4148.66,3556.01,3111.47,2489.21,2074.33,1778.00,1555.74,1244.63,1037.19,889.02,
+777.87,622.31,518.59,444.54,388.93,311.16,259.32,222.27,194.47,155.60,129.66,111.16,97.23,77.82,64.85,55.60,
+48.62,38.91,32.43,27.80,24.31,19.46,16.24,13.92,12.15,9.75,8.12,6.98,6.08,4.90,4.08,3.49,
+3.04,2.49,2.13,1.90,1.72,1.41,1.18,1.04,0.91,0.73,0.59,0.50,0.45,0.45,0.45,0.45};
+#define AR2DR 14.32833
+static signed int lin2expvol[0x400];
+static int TLSteps[2];
+
+#define EG_SHIFT 16
+
+static int EG_Update(struct _SLOT *slot)
+{
+ switch(slot->EG.state)
+ {
+ case ATTACK:
+ slot->EG.volume+=slot->EG.AR;
+ if(slot->EG.volume>=(0x3ff<<EG_SHIFT))
+ {
+ slot->EG.state=DECAY1;
+ if(slot->EG.D1R>=(0x400<<EG_SHIFT)) //Skip DECAY1, go directly to DECAY2
+ slot->EG.state=DECAY2;
+ slot->EG.volume=0x3ff<<EG_SHIFT;
+ }
+ break;
+ case DECAY1:
+ slot->EG.volume-=slot->EG.D1R;
+ if(slot->EG.volume<=0)
+ slot->EG.volume=0;
+ if(slot->EG.volume>>EG_SHIFT<=(slot->EG.DL<<(10-4)))
+ slot->EG.state=DECAY2;
+ break;
+ case DECAY2:
+ slot->EG.volume-=slot->EG.D2R;
+ if(slot->EG.volume<=0)
+ slot->EG.volume=0;
+ break;
+ case RELEASE:
+ slot->EG.volume-=slot->EG.RR;
+ if(slot->EG.volume<=0)
+ {
+ slot->EG.volume=0;
+ slot->Playing=0;
+ }
+ break;
+ default:
+ return 1<<SHIFT;
+ }
+ return lin2expvol[slot->EG.volume>>EG_SHIFT];
+}
+
+static unsigned int Get_RATE(unsigned int *Steps,unsigned int rate,unsigned int val)
+{
+ int r=4*val+rate;
+ if(val==0)
+ return Steps[0];
+ if(val==0xf)
+ return Steps[0x3f];
+ if(r>0x3f)
+ r=0x3f;
+ return Steps[r];
+}
+
+static void EG_Calc(MultiPCM *ptChip,struct _SLOT *slot)
+{
+ int octave=((slot->Regs[3]>>4)-1)&0xf;
+ int rate;
+ if(octave&8) octave=octave-16;
+ if(slot->Sample->KRS!=0xf)
+ rate=(octave+slot->Sample->KRS)*2+((slot->Regs[3]>>3)&1);
+ else
+ rate=0;
+
+ slot->EG.AR=Get_RATE(ptChip->ARStep,rate,slot->Sample->AR);
+ slot->EG.D1R=Get_RATE(ptChip->DRStep,rate,slot->Sample->DR1);
+ slot->EG.D2R=Get_RATE(ptChip->DRStep,rate,slot->Sample->DR2);
+ slot->EG.RR=Get_RATE(ptChip->DRStep,rate,slot->Sample->RR);
+ slot->EG.DL=0xf-slot->Sample->DL;
+
+}
+
+/*****************************
+ LFO SECTION
+*****************************/
+
+#define LFO_SHIFT 8
+
+
+#define LFIX(v) ((unsigned int) ((float) (1<<LFO_SHIFT)*(v)))
+
+//Convert DB to multiply amplitude
+#define DB(v) LFIX(pow(10.0,v/20.0))
+
+//Convert cents to step increment
+#define CENTS(v) LFIX(pow(2.0,v/1200.0))
+
+static int PLFO_TRI[256];
+static int ALFO_TRI[256];
+
+static const float LFOFreq[8]={0.168f,2.019f,3.196f,4.206f,5.215f,5.888f,6.224f,7.066f}; //Hz;
+static const float PSCALE[8]={0.0f,3.378f,5.065f,6.750f,10.114f,20.170f,40.180f,79.307f}; //cents
+static const float ASCALE[8]={0.0f,0.4f,0.8f,1.5f,3.0f,6.0f,12.0f,24.0f}; //DB
+static int PSCALES[8][256];
+static int ASCALES[8][256];
+
+static void LFO_Init(void)
+{
+ int i,s;
+ for(i=0;i<256;++i)
+ {
+ int a; //amplitude
+ int p; //phase
+
+ //Tri
+ if(i<128)
+ a=255-(i*2);
+ else
+ a=(i*2)-256;
+ if(i<64)
+ p=i*2;
+ else if(i<128)
+ p=255-i*2;
+ else if(i<192)
+ p=256-i*2;
+ else
+ p=i*2-511;
+ ALFO_TRI[i]=a;
+ PLFO_TRI[i]=p;
+ }
+
+ for(s=0;s<8;++s)
+ {
+ float limit=PSCALE[s];
+ for(i=-128;i<128;++i)
+ {
+ PSCALES[s][i+128]=CENTS(((limit*(float) i)/128.0));
+ }
+ limit=-ASCALE[s];
+ for(i=0;i<256;++i)
+ {
+ ASCALES[s][i]=DB(((limit*(float) i)/256.0));
+ }
+ }
+}
+
+INLINE signed int PLFO_Step(struct _LFO *LFO)
+{
+ int p;
+ LFO->phase+=LFO->phase_step;
+ p=LFO->table[(LFO->phase>>LFO_SHIFT)&0xff];
+ p=LFO->scale[p+128];
+ return p<<(SHIFT-LFO_SHIFT);
+}
+
+INLINE signed int ALFO_Step(struct _LFO *LFO)
+{
+ int p;
+ LFO->phase+=LFO->phase_step;
+ p=LFO->table[(LFO->phase>>LFO_SHIFT)&0xff];
+ p=LFO->scale[p];
+ return p<<(SHIFT-LFO_SHIFT);
+}
+
+static void LFO_ComputeStep(MultiPCM *ptChip,struct _LFO *LFO,UINT32 LFOF,UINT32 LFOS,int ALFO)
+{
+ float step=(float) LFOFreq[LFOF]*256.0/(float) ptChip->Rate;
+ LFO->phase_step=(unsigned int) ((float) (1<<LFO_SHIFT)*step);
+ if(ALFO)
+ {
+ LFO->table=ALFO_TRI;
+ LFO->scale=ASCALES[LFOS];
+ }
+ else
+ {
+ LFO->table=PLFO_TRI;
+ LFO->scale=PSCALES[LFOS];
+ }
+}
+
+
+
+static void WriteSlot(MultiPCM *ptChip,struct _SLOT *slot,int reg,unsigned char data)
+{
+ slot->Regs[reg]=data;
+
+ switch(reg)
+ {
+ case 0: //PANPOT
+ slot->Pan=(data>>4)&0xf;
+ break;
+ case 1: //Sample
+ //according to YMF278 sample write causes some base params written to the regs (envelope+lfos)
+ //the game should never change the sample while playing.
+ {
+ struct _Sample *Sample=ptChip->Samples+slot->Regs[1];
+ WriteSlot(ptChip,slot,6,Sample->LFOVIB);
+ WriteSlot(ptChip,slot,7,Sample->AM);
+ }
+ break;
+ case 2: //Pitch
+ case 3:
+ {
+ unsigned int oct=((slot->Regs[3]>>4)-1)&0xf;
+ unsigned int pitch=((slot->Regs[3]&0xf)<<6)|(slot->Regs[2]>>2);
+ pitch=ptChip->FNS_Table[pitch];
+ if(oct&0x8)
+ pitch>>=(16-oct);
+ else
+ pitch<<=oct;
+ slot->step=pitch/ptChip->Rate;
+ }
+ break;
+ case 4: //KeyOn/Off (and more?)
+ {
+ if(data&0x80) //KeyOn
+ {
+ slot->Sample=ptChip->Samples+slot->Regs[1];
+ slot->Playing=1;
+ slot->Base=slot->Sample->Start;
+ slot->offset=0;
+ slot->Prev=0;
+ slot->TL=slot->DstTL<<SHIFT;
+
+ EG_Calc(ptChip,slot);
+ slot->EG.state=ATTACK;
+ slot->EG.volume=0;
+
+ if(slot->Base>=0x100000)
+ {
+ if(slot->Pan&8)
+ slot->Base=(slot->Base&0xfffff)|(ptChip->BankL);
+ else
+ slot->Base=(slot->Base&0xfffff)|(ptChip->BankR);
+ }
+
+ }
+ else
+ {
+ if(slot->Playing)
+ {
+ if(slot->Sample->RR!=0xf)
+ slot->EG.state=RELEASE;
+ else
+ slot->Playing=0;
+ }
+ }
+ }
+ break;
+ case 5: //TL+Interpolation
+ {
+ slot->DstTL=(data>>1)&0x7f;
+ if(!(data&1)) //Interpolate TL
+ {
+ if((slot->TL>>SHIFT)>slot->DstTL)
+ slot->TLStep=TLSteps[0]; //decrease
+ else
+ slot->TLStep=TLSteps[1]; //increase
+ }
+ else
+ slot->TL=slot->DstTL<<SHIFT;
+ }
+ break;
+ case 6: //LFO freq+PLFO
+ {
+ if(data)
+ {
+ LFO_ComputeStep(ptChip,&(slot->PLFO),(slot->Regs[6]>>3)&7,slot->Regs[6]&7,0);
+ LFO_ComputeStep(ptChip,&(slot->ALFO),(slot->Regs[6]>>3)&7,slot->Regs[7]&7,1);
+ }
+ }
+ break;
+ case 7: //ALFO
+ {
+ if(data)
+ {
+ LFO_ComputeStep(ptChip,&(slot->PLFO),(slot->Regs[6]>>3)&7,slot->Regs[6]&7,0);
+ LFO_ComputeStep(ptChip,&(slot->ALFO),(slot->Regs[6]>>3)&7,slot->Regs[7]&7,1);
+ }
+ }
+ break;
+ }
+}
+
+static STREAM_UPDATE( MultiPCM_update )
+{
+ MultiPCM *ptChip = (MultiPCM *)param;
+ stream_sample_t *datap[2];
+ int i,sl;
+
+ datap[0] = outputs[0];
+ datap[1] = outputs[1];
+
+ memset(datap[0], 0, sizeof(*datap[0])*samples);
+ memset(datap[1], 0, sizeof(*datap[1])*samples);
+
+
+ for(i=0;i<samples;++i)
+ {
+ signed int smpl=0;
+ signed int smpr=0;
+ for(sl=0;sl<28;++sl)
+ {
+ struct _SLOT *slot=ptChip->Slots+sl;
+ if(slot->Playing)
+ {
+ unsigned int vol=(slot->TL>>SHIFT)|(slot->Pan<<7);
+ unsigned int adr=slot->offset>>SHIFT;
+ signed int sample;
+ unsigned int step=slot->step;
+ signed int csample=(signed short) (ptChip->ROM[slot->Base+adr]<<8);
+ signed int fpart=slot->offset&((1<<SHIFT)-1);
+ sample=(csample*fpart+slot->Prev*((1<<SHIFT)-fpart))>>SHIFT;
+
+ if(slot->Regs[6]&7) //Vibrato enabled
+ {
+ step=step*PLFO_Step(&(slot->PLFO));
+ step>>=SHIFT;
+ }
+
+ slot->offset+=step;
+ if(slot->offset>=(slot->Sample->End<<SHIFT))
+ {
+ slot->offset=slot->Sample->Loop<<SHIFT;
+ }
+ if(adr^(slot->offset>>SHIFT))
+ {
+ slot->Prev=csample;
+ }
+
+ if((slot->TL>>SHIFT)!=slot->DstTL)
+ slot->TL+=slot->TLStep;
+
+ if(slot->Regs[7]&7) //Tremolo enabled
+ {
+ sample=sample*ALFO_Step(&(slot->ALFO));
+ sample>>=SHIFT;
+ }
+
+ sample=(sample*EG_Update(slot))>>10;
+
+ smpl+=(LPANTABLE[vol]*sample)>>SHIFT;
+ smpr+=(RPANTABLE[vol]*sample)>>SHIFT;
+ }
+ }
+#define ICLIP16(x) (x<-32768)?-32768:((x>32767)?32767:x)
+ datap[0][i]=ICLIP16(smpl);
+ datap[1][i]=ICLIP16(smpr);
+ }
+}
+
+READ8_DEVICE_HANDLER( multipcm_r )
+{
+// MultiPCM *ptChip = get_safe_token(device);
+ return 0;
+}
+
+static DEVICE_START( multipcm )
+{
+ MultiPCM *ptChip = get_safe_token(device);
+ int i;
+
+ ptChip->ROM=*device->region();
+ ptChip->Rate=(float) device->clock() / MULTIPCM_CLOCKDIV;
+
+ ptChip->stream = device->machine().sound().stream_alloc(*device, 0, 2, ptChip->Rate, ptChip, MultiPCM_update);
+
+ //Volume+pan table
+ for(i=0;i<0x800;++i)
+ {
+ float SegaDB=0;
+ float TL;
+ float LPAN,RPAN;
+
+ unsigned char iTL=i&0x7f;
+ unsigned char iPAN=(i>>7)&0xf;
+
+ SegaDB=(float) iTL*(-24.0)/(float) 0x40;
+
+ TL=pow(10.0,SegaDB/20.0);
+
+
+ if(iPAN==0x8)
+ {
+ LPAN=RPAN=0.0;
+ }
+ else if(iPAN==0x0)
+ {
+ LPAN=RPAN=1.0;
+ }
+ else if(iPAN&0x8)
+ {
+ LPAN=1.0;
+
+ iPAN=0x10-iPAN;
+
+ SegaDB=(float) iPAN*(-12.0)/(float) 0x4;
+
+ RPAN=pow(10.0,SegaDB/20.0);
+
+ if((iPAN&0x7)==7)
+ RPAN=0.0;
+ }
+ else
+ {
+ RPAN=1.0;
+
+ SegaDB=(float) iPAN*(-12.0)/(float) 0x4;
+
+ LPAN=pow(10.0,SegaDB/20.0);
+ if((iPAN&0x7)==7)
+ LPAN=0.0;
+ }
+
+ TL/=4.0;
+
+ LPANTABLE[i]=FIX((LPAN*TL));
+ RPANTABLE[i]=FIX((RPAN*TL));
+ }
+
+ //Pitch steps
+ for(i=0;i<0x400;++i)
+ {
+ float fcent=ptChip->Rate*(1024.0+(float) i)/1024.0;
+ ptChip->FNS_Table[i]=(unsigned int ) ((float) (1<<SHIFT) *fcent);
+ }
+
+ //Envelope steps
+ for(i=0;i<0x40;++i)
+ {
+ //Times are based on 44100 clock, adjust to real chip clock
+ ptChip->ARStep[i]=(float) (0x400<<EG_SHIFT)/(BaseTimes[i]*44100.0/(1000.0));
+ ptChip->DRStep[i]=(float) (0x400<<EG_SHIFT)/(BaseTimes[i]*AR2DR*44100.0/(1000.0));
+ }
+ ptChip->ARStep[0]=ptChip->ARStep[1]=ptChip->ARStep[2]=ptChip->ARStep[3]=0;
+ ptChip->ARStep[0x3f]=0x400<<EG_SHIFT;
+ ptChip->DRStep[0]=ptChip->DRStep[1]=ptChip->DRStep[2]=ptChip->DRStep[3]=0;
+
+ //TL Interpolation steps
+ //lower
+ TLSteps[0]=-(float) (0x80<<SHIFT)/(78.2*44100.0/1000.0);
+ //raise
+ TLSteps[1]=(float) (0x80<<SHIFT)/(78.2*2*44100.0/1000.0);
+
+ //build the linear->exponential ramps
+ for(i=0;i<0x400;++i)
+ {
+ float db=-(96.0-(96.0*(float) i/(float) 0x400));
+ lin2expvol[i]=pow(10.0,db/20.0)*(float) (1<<SHIFT);
+ }
+
+
+ for(i=0;i<512;++i)
+ {
+ UINT8 *ptSample=(UINT8 *) ptChip->ROM+i*12;
+ ptChip->Samples[i].Start=(ptSample[0]<<16)|(ptSample[1]<<8)|(ptSample[2]<<0);
+ ptChip->Samples[i].Loop=(ptSample[3]<<8)|(ptSample[4]<<0);
+ ptChip->Samples[i].End=0xffff-((ptSample[5]<<8)|(ptSample[6]<<0));
+ ptChip->Samples[i].LFOVIB=ptSample[7];
+ ptChip->Samples[i].DR1=ptSample[8]&0xf;
+ ptChip->Samples[i].AR=(ptSample[8]>>4)&0xf;
+ ptChip->Samples[i].DR2=ptSample[9]&0xf;
+ ptChip->Samples[i].DL=(ptSample[9]>>4)&0xf;
+ ptChip->Samples[i].RR=ptSample[10]&0xf;
+ ptChip->Samples[i].KRS=(ptSample[10]>>4)&0xf;
+ ptChip->Samples[i].AM=ptSample[11];
+ }
+
+ device->save_item(NAME(ptChip->CurSlot));
+ device->save_item(NAME(ptChip->Address));
+ device->save_item(NAME(ptChip->BankL));
+ device->save_item(NAME(ptChip->BankR));
+
+ for(i=0;i<28;++i)
+ {
+ ptChip->Slots[i].Num=i;
+ ptChip->Slots[i].Playing=0;
+
+ device->save_item(NAME(ptChip->Slots[i].Num), i);
+ device->save_item(NAME(ptChip->Slots[i].Regs), i);
+ device->save_item(NAME(ptChip->Slots[i].Playing), i);
+ device->save_item(NAME(ptChip->Slots[i].Base), i);
+ device->save_item(NAME(ptChip->Slots[i].offset), i);
+ device->save_item(NAME(ptChip->Slots[i].step), i);
+ device->save_item(NAME(ptChip->Slots[i].Pan), i);
+ device->save_item(NAME(ptChip->Slots[i].TL), i);
+ device->save_item(NAME(ptChip->Slots[i].DstTL), i);
+ device->save_item(NAME(ptChip->Slots[i].TLStep), i);
+ device->save_item(NAME(ptChip->Slots[i].Prev), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.volume), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.state), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.step), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.AR), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.D1R), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.D2R), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.RR), i);
+ device->save_item(NAME(ptChip->Slots[i].EG.DL), i);
+ device->save_item(NAME(ptChip->Slots[i].PLFO.phase), i);
+ device->save_item(NAME(ptChip->Slots[i].PLFO.phase_step), i);
+ device->save_item(NAME(ptChip->Slots[i].ALFO.phase), i);
+ device->save_item(NAME(ptChip->Slots[i].ALFO.phase_step), i);
+ }
+
+ LFO_Init();
+}
+
+
+WRITE8_DEVICE_HANDLER( multipcm_w )
+{
+ MultiPCM *ptChip = get_safe_token(device);
+ switch(offset)
+ {
+ case 0: //Data write
+ WriteSlot(ptChip,ptChip->Slots+ptChip->CurSlot,ptChip->Address,data);
+ break;
+ case 1:
+ ptChip->CurSlot=val2chan[data&0x1f];
+ break;
+
+ case 2:
+ ptChip->Address=(data>7)?7:data;
+ break;
+ }
+}
+
+/* MAME/M1 access functions */
+
+void multipcm_set_bank(device_t *device, UINT32 leftoffs, UINT32 rightoffs)
+{
+ MultiPCM *ptChip = get_safe_token(device);
+ ptChip->BankL = leftoffs;
+ ptChip->BankR = rightoffs;
+}
+
+
+
+/**************************************************************************
+ * Generic get_info
+ **************************************************************************/
+
+DEVICE_GET_INFO( multipcm )
+{
+ switch (state)
+ {
+ /* --- the following bits of info are returned as 64-bit signed integers --- */
+ case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(MultiPCM); break;
+
+ /* --- the following bits of info are returned as pointers to data or functions --- */
+ case DEVINFO_FCT_START: info->start = DEVICE_START_NAME( multipcm ); break;
+ case DEVINFO_FCT_STOP: /* Nothing */ break;
+ case DEVINFO_FCT_RESET: /* Nothing */ break;
+
+ /* --- the following bits of info are returned as NULL-terminated strings --- */
+ case DEVINFO_STR_NAME: strcpy(info->s, "Sega/Yamaha 315-5560"); break;
+ case DEVINFO_STR_FAMILY: strcpy(info->s, "Sega custom"); break;
+ case DEVINFO_STR_VERSION: strcpy(info->s, "2.0"); break;
+ case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break;
+ case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright Nicola Salmoria and the MAME Team"); break;
+ }
+}
+
+
+DEFINE_LEGACY_SOUND_DEVICE(MULTIPCM, multipcm);