public void c140_write_rom2(byte ChipID, uint ROMSize, uint DataStart, uint DataLength, byte[] ROMData, uint SrcStartAdr)
{
c140_state info = C140Data[ChipID];
if (info.pRomSize != ROMSize)
{
info.pRom = new byte[ROMSize];
info.pRomSize = ROMSize;
for (int i = 0; i < ROMSize; i++)
{
info.pRom[i] = 0xff;
}
//memset(info->pRom, 0xFF, ROMSize);
}
if (DataStart > ROMSize)
{
return;
}
if (DataStart + DataLength > ROMSize)
{
DataLength = ROMSize - DataStart;
}
for (int i = 0; i < DataLength; i++)
{
info.pRom[i + DataStart] = ROMData[i + SrcStartAdr];
}
//memcpy((INT8*)info->pRom + DataStart, ROMData, DataLength);
//System.Console.WriteLine("c140_write_rom2:{0}:{1}:{2}:{3}:{4}", ChipID, ROMSize, DataStart, DataLength, SrcStartAdr);
return;
}
//void c140_set_base(device_t *device, void *base);
public void c140_set_base(byte ChipID, byte[] Base)
{
//c140_state *info = get_safe_token(device);
c140_state info = C140Data[ChipID];
info.pRom = Base;
}
/*typedef struct _c140_interface c140_interface;
* struct _c140_interface {
* int banking_type;
* };*/
public void c140_write_rom(byte ChipID, uint ROMSize, uint DataStart, uint DataLength, byte[] ROMData)
{
c140_state info = C140Data[ChipID];
if (info.pRomSize != ROMSize)
{
info.pRom = new byte[ROMSize];
info.pRomSize = ROMSize;
for (int i = 0; i < ROMSize; i++)
{
info.pRom[i] = 0xff;
}
//memset(info->pRom, 0xFF, ROMSize);
}
if (DataStart > ROMSize)
{
return;
}
if (DataStart + DataLength > ROMSize)
{
DataLength = ROMSize - DataStart;
}
for (int i = 0; i < DataLength; i++)
{
info.pRom[i + DataStart] = ROMData[i];
}
//memcpy((INT8*)info->pRom + DataStart, ROMData, DataLength);
return;
}
/*
* find_sample: compute the actual address of a sample given it's
* address and banking registers, as well as the board type.
*
* I suspect in "real life" this works like the Sega MultiPCM where the banking
* is done by a small PAL or GAL external to the sound chip, which can be switched
* per-game or at least per-PCB revision as addressing range needs grow.
*/
private static long find_sample(c140_state info, long adrs, long bank, int voice)
{
//System.Console.Write("[{0:X}:{1:d}", adrs,bank);
long newadr = 0;
int[] asic219banks = new int[4] {
0x1f7, 0x1f1, 0x1f3, 0x1f5
};
adrs = (bank << 16) + adrs;
switch (info.banking_type)
{
case C140_TYPE.SYSTEM2:
// System 2 banking
newadr = ((adrs & 0x200000) >> 2) | (adrs & 0x7ffff);
//System.Console.Write(":{0:X}]", newadr);
break;
case C140_TYPE.SYSTEM21:
// System 21 banking.
// similar to System 2's.
newadr = ((adrs & 0x300000) >> 1) | (adrs & 0x7ffff);
break;
/*case C140_TYPE.SYSTEM21_A:
* // System 21 type A (simple) banking.
* // similar to System 2's.
* newadr = ((adrs & 0x300000) >> 1) + (adrs & 0x7ffff);
* break;
*
* case C140_TYPE.SYSTEM21_B:
* // System 21 type B (chip select) banking
*
* // get base address of sample inside the bank
* newadr = ((adrs & 0x100000) >> 2) + (adrs & 0x3ffff);
*
* // now add the starting bank offsets based on the 2
* // chip select bits.
* // 0x40000 picks individual 512k ROMs
* if ((adrs & 0x40000) != 0)
* {
* newadr += 0x80000;
* }
*
* // and 0x200000 which group of chips...
* if ((adrs & 0x200000) != 0)
* {
* newadr += 0x100000;
* }
* break;*/
case C140_TYPE.ASIC219:
// ASIC219's banking is fairly simple
newadr = (long)((info.REG[asic219banks[voice / 4]] & 0x3) * 0x20000) | adrs;
break;
}
return(newadr);
}
/* C140.h */
//#pragma once
//public void c140_update(byte ChipID, int[][] outputs, int samples)
//{
// //c140_state *info = (c140_state *)param;
// c140_state info = C140Data[ChipID];
// int i, j;
// int rvol, lvol;
// int dt;
// int sdt;
// int st, ed, sz;
// long pSampleData;
// int frequency, delta, offset, pos;
// int cnt, voicecnt;
// int lastdt, prevdt, dltdt;
// float pbase = (float)info.baserate * 2.0f / (float)info.sample_rate;
// //System.Console.Write("pbase={0:f6} info->baserate={1:d} info->sample_rate={2:d} \n", pbase, info.baserate, info.sample_rate);
// int[] lmix, rmix;
// if (samples > info.sample_rate) samples = info.sample_rate;
// /* zap the contents of the mixer buffer */
// for (int ind = 0; ind < samples; ind++)
// {
// info.mixer_buffer_left[ind] = 0;
// info.mixer_buffer_right[ind] = 0;
// }
// if (info.pRom == null)
// return;
// //System.Console.WriteLine("c140_update");
// /* get the number of voices to update */
// voicecnt = (info.banking_type == C140_TYPE.ASIC219) ? 16 : 24;
// //--- audio update
// for (i = 0; i < voicecnt; i++)
// {
// VOICE v = info.voi[i];
// //voice_registers vreg = (voice_registers)info.REG[i * 16];
// int vreg = i * 16;
// if (v.key != 0 && v.Muted == 0)
// {
// System.Console.Write("voicecnt={0:d} ", i);
// frequency = info.REG[vreg + 2] * 256 + info.REG[vreg + 3];
// /* Abort voice if no frequency value set */
// if (frequency == 0) continue;
// System.Console.Write("frequency={0:d} ", frequency);
// /* Delta = frequency * ((8MHz/374)*2 / sample rate) */
// delta = (int)((float)frequency * pbase);
// System.Console.Write("delta={0:d} ", delta);
// /* Calculate left/right channel volumes */
// lvol = (info.REG[vreg + 1] * 32) / MAX_VOICE; //32ch -> 24ch
// rvol = (info.REG[vreg + 0] * 32) / MAX_VOICE;
// System.Console.Write("MAX_VOICE={0} lvol={1} vreg->volume_left={2} ", MAX_VOICE, lvol, info.REG[vreg + 1]);
// System.Console.Write("rvol={0} vreg->volume_right={1} ", rvol, info.REG[vreg + 0]);
// /* Set mixer outputs base pointers */
// lmix = info.mixer_buffer_left;
// rmix = info.mixer_buffer_right;
// /* Retrieve sample start/end and calculate size */
// st = (int)v.sample_start;
// ed = (int)v.sample_end;
// sz = ed - st;
// System.Console.Write("st={0} ed={1} ", st, ed);
// /* Retrieve base pointer to the sample data */
// //pSampleData=(signed char*)((FPTR)info->pRom + find_sample(info, st, v->bank, i));
// //pSampleData = info.pRom[find_sample(info, st, v.bank, i)];
// pSampleData = find_sample(info, st, v.bank, i);
// System.Console.Write("find_sample={0} ", find_sample(info, st, v.bank, i));
// /* Fetch back previous data pointers */
// offset = (int)v.ptoffset;
// pos = (int)v.pos;
// lastdt = (int)v.lastdt;
// prevdt = (int)v.prevdt;
// dltdt = (int)v.dltdt;
// System.Console.Write("offset={0} pos={1} lastdt={2} prevdt={3} dltdt={4} ", offset, pos, lastdt, prevdt, dltdt);
// System.Console.Write("v->mode={0} info->banking_type={1} ", v.mode, (int)info.banking_type);
// /* Switch on data type - compressed PCM is only for C140 */
// if ((v.mode & 8) != 0 && (info.banking_type != C140_TYPE.ASIC219))
// {
// //compressed PCM (maybe correct...)
// /* Loop for enough to fill sample buffer as requested */
// for (j = 0; j < samples; j++)
// {
// offset += delta;
// cnt = (offset >> 16) & 0x7fff;
// offset &= 0xffff;
// pos += cnt;
// System.Console.Write("offset={0} cnt={1} pos={2} ", offset, cnt, pos);
// //for(;cnt>0;cnt--)
// {
// /* Check for the end of the sample */
// if (pos >= sz)
// {
// /* Check if its a looping sample, either stop or loop */
// if ((v.mode & 0x10) != 0)
// {
// pos = (int)(v.sample_loop - st);
// }
// else
// {
// v.key = 0;
// break;
// }
// }
// /* Read the chosen sample byte */
// dt = info.pRom[pSampleData + pos];
// System.Console.Write("dt={0} ", dt);
// /* decompress to 13bit range */ //2000.06.26 CAB
// sdt = dt >> 3; //signed
// System.Console.Write("sdt={0} ", sdt);
// if (sdt < 0) sdt = (sdt << (dt & 7)) - info.pcmtbl[dt & 7];
// else sdt = (sdt << (dt & 7)) + info.pcmtbl[dt & 7];
// System.Console.Write("sdt={0} info->pcmtbl[dt&7]={1} ", sdt, info.pcmtbl[dt & 7]);
// prevdt = lastdt;
// lastdt = sdt;
// dltdt = (lastdt - prevdt);
// System.Console.Write("prevdt={0} lastdt={1} dltdt={2} ", prevdt, lastdt, dltdt);
// }
// /* Caclulate the sample value */
// dt = ((dltdt * offset) >> 16) + prevdt;
// System.Console.Write("dt={0} ", dt);
// /* Write the data to the sample buffers */
// lmix[j] += (dt * lvol) >> (5 + 5);
// rmix[j] += (dt * rvol) >> (5 + 5);
// System.Console.Write("(dt*lvol)>>(5+5)={0} ", (dt * lvol) >> (5 + 5));
// System.Console.Write("(dt*rvol)>>(5+5)={0} ", (dt * rvol) >> (5 + 5));
// }
// }
// else
// {
// /* linear 8bit signed PCM */
// for (j = 0; j < samples; j++)
// {
// offset += delta;
// cnt = (offset >> 16) & 0x7fff;
// offset &= 0xffff;
// pos += cnt;
// System.Console.Write("linear offset={0} cnt={1} pos={2} ", offset, cnt, pos);
// /* Check for the end of the sample */
// if (pos >= sz)
// {
// /* Check if its a looping sample, either stop or loop */
// if ((v.mode & 0x10) != 0)
// {
// pos = (int)(v.sample_loop - st);
// }
// else
// {
// v.key = 0;
// break;
// }
// }
// if (cnt != 0)
// {
// prevdt = lastdt;
// if (info.banking_type == C140_TYPE.ASIC219)
// {
// //lastdt = pSampleData[BYTE_XOR_BE(pos)];
// lastdt = info.pRom[pSampleData + (pos ^ 0x01)];
// // Sign + magnitude format
// if ((v.mode & 0x01) != 0 && ((lastdt & 0x80) != 0))
// lastdt = -(lastdt & 0x7f);
// // Sign flip
// if ((v.mode & 0x40) != 0)
// lastdt = -lastdt;
// }
// else
// {
// lastdt = ((info.pRom[pSampleData + pos] & 0x80) != 0) ? (info.pRom[pSampleData + pos] - 256) : info.pRom[pSampleData + pos];
// }
// dltdt = (lastdt - prevdt);
// System.Console.Write("prevdt={0} lastdt={1} dltdt={2} ", prevdt, lastdt, dltdt);
// }
// /* Caclulate the sample value */
// dt = ((dltdt * offset) >> 16) + prevdt;
// System.Console.Write("dt={0} ", dt);
// /* Write the data to the sample buffers */
// lmix[j] += (dt * lvol) >> 5;
// rmix[j] += (dt * rvol) >> 5;
// System.Console.Write("(dt*lvol)>>5={0} ", (dt * lvol) >> 5);
// System.Console.Write("(dt*rvol)>>5={0} ", (dt * rvol) >> 5);
// }
// }
// /* Save positional data for next callback */
// v.ptoffset = offset;
// v.pos = pos;
// v.lastdt = lastdt;
// v.prevdt = prevdt;
// v.dltdt = dltdt;
// System.Console.Write("\n");
// }
// }
// /* render to MAME's stream buffer */
// lmix = info.mixer_buffer_left;
// rmix = info.mixer_buffer_right;
// {
// int[] dest1 = outputs[0];
// int[] dest2 = outputs[1];
// for (i = 0; i < samples; i++)
// {
// //*dest1++ = limit(8*(*lmix++));
// //*dest2++ = limit(8*(*rmix++));
// dest1[i] = 8 * lmix[i];
// dest2[i] = 8 * rmix[i];
// }
// }
//}
//READ8_DEVICE_HANDLER( c140_r );
//WRITE8_DEVICE_HANDLER( c140_w );
public byte c140_r(byte ChipID, uint offset)
{
//c140_state *info = get_safe_token(device);
c140_state info = C140Data[ChipID];
offset &= 0x1ff;
return(info.REG[offset]);
}
public override void Stop(byte ChipID)
{
c140_state info = C140Data[ChipID];
//free(info->pRom);
info.pRom = null;
//free(info->mixer_buffer_left);
info.mixer_buffer_left = null;
info.mixer_buffer_right = null;
//return;
}
public void c140_set_mute_mask(byte ChipID, uint MuteMask)
{
c140_state info = C140Data[ChipID];
byte CurChn;
for (CurChn = 0; CurChn < MAX_VOICE; CurChn++)
{
info.voi[CurChn].Muted = (byte)((MuteMask >> CurChn) & 0x01);
}
return;
}
private static long find_sample(c140_state info, long adrs, long bank, int voice)
{
adrs = (bank << 16) + adrs;
switch (info.banking_type)
{
case C140_TYPE.SYSTEM2:
// System 2 banking
return(((adrs & 0x200000) >> 2) | (adrs & 0x7ffff));
case C140_TYPE.SYSTEM21:
// System 21 banking.
// similar to System 2's.
return(((adrs & 0x300000) >> 1) | (adrs & 0x7ffff));
case C140_TYPE.ASIC219:
// ASIC219's banking is fairly simple
return((long)((info.REG[asic219banks[voice / 4]] & 0x3) * 0x20000) | adrs);
}
return(0);
}
//private int debugCnt = 0;
public override void Update(byte ChipID, int[][] outputs, int samples)
{
//c140_state *info = (c140_state *)param;
c140_state info = C140Data[ChipID];
int i, j;
int rvol, lvol;
int dt;
int sdt;
int st, ed, sz;
long pSampleData;
int frequency, delta, offset, pos;
int cnt, voicecnt;
int lastdt, prevdt, dltdt;
float pbase = (float)info.baserate * 2.0f / (float)info.sample_rate;
int[] lmix, rmix;
if (samples > info.sample_rate)
{
samples = info.sample_rate;
}
/* zap the contents of the mixer buffer */
for (int ind = 0; ind < samples; ind++)
{
info.mixer_buffer_left[ind] = 0;
info.mixer_buffer_right[ind] = 0;
}
if (info.pRom == null)
{
return;
}
/* get the number of voices to update */
voicecnt = (info.banking_type == C140_TYPE.ASIC219) ? 16 : 24;
//--- audio update
for (i = 0; i < voicecnt; i++)
{
VOICE v = info.voi[i];
//voice_registers vreg = (voice_registers)info.REG[i * 16];
int vreg = i * 16;
if (v.key == 0 || v.Muted != 0)
{
continue;
}
frequency = (info.REG[vreg + 2] << 8) | info.REG[vreg + 3];
/* Abort voice if no frequency value set */
if (frequency == 0)
{
continue;
}
/* Delta = frequency * ((8MHz/374)*2 / sample rate) */
delta = (int)(frequency * pbase);
/* Calculate left/right channel volumes */
lvol = (info.REG[vreg + 1] << 5) / MAX_VOICE; //32ch -> 24ch
rvol = (info.REG[vreg + 0] << 5) / MAX_VOICE;
/* Set mixer outputs base pointers */
lmix = info.mixer_buffer_left;
rmix = info.mixer_buffer_right;
/* Retrieve sample start/end and calculate size */
st = (int)v.sample_start;
ed = (int)v.sample_end;
sz = ed - st;
/* Retrieve base pointer to the sample data */
//pSampleData=(signed char*)((FPTR)info->pRom + find_sample(info, st, v->bank, i));
//pSampleData = info.pRom[find_sample(info, st, v.bank, i)];
pSampleData = find_sample(info, st, v.bank, i);
/* Fetch back previous data pointers */
offset = (int)v.ptoffset;
pos = (int)v.pos;
lastdt = (int)v.lastdt;
prevdt = (int)v.prevdt;
dltdt = (int)v.dltdt;
/* Switch on data type - compressed PCM is only for C140 */
if ((v.mode & 8) != 0 && (info.banking_type != C140_TYPE.ASIC219))
{
//compressed PCM (maybe correct...)
/* Loop for enough to fill sample buffer as requested */
for (j = 0; j < samples; j++)
{
offset += delta;
cnt = (offset >> 16) & 0x7fff;
offset &= 0xffff;
pos += cnt;
/* Check for the end of the sample */
if (pos >= sz)
{
//Console.WriteLine("c140 pos[{0:x}]",pos);
//debugCnt = 20;
/* Check if its a looping sample, either stop or loop */
if ((v.mode & 0x10) != 0)
{
pos = (int)(v.sample_loop - st);
}
else
{
v.key = 0;
break;
}
}
/* Read the chosen sample byte */
dt = (sbyte)info.pRom[pSampleData + pos];
/* decompress to 13bit range */ //2000.06.26 CAB
sdt = dt >> 3; //signed
if (sdt < 0)
{
sdt = (sdt << (dt & 7)) - info.pcmtbl[dt & 7];
}
else
{
sdt = (sdt << (dt & 7)) + info.pcmtbl[dt & 7];
}
prevdt = lastdt;
lastdt = sdt;
dltdt = (lastdt - prevdt);
/* Caclulate the sample value */
dt = ((dltdt * offset) >> 16) + prevdt;
/* Write the data to the sample buffers */
lmix[j] += (dt * lvol) >> (5 + 5);
rmix[j] += (dt * rvol) >> (5 + 5);
}
}
else
{
/* linear 8bit signed PCM */
for (j = 0; j < samples; j++)
{
offset += delta;
cnt = (offset >> 16) & 0x7fff;
offset &= 0xffff;
pos += cnt;
/* Check for the end of the sample */
if (pos >= sz)
{
//Console.WriteLine("c140 pos[{0:x}]", pos);
//debugCnt = 20;
/* Check if its a looping sample, either stop or loop */
if ((v.mode & 0x10) != 0)
{
pos = (int)(v.sample_loop - st);
}
else
{
v.key = 0;
break;
}
}
if (cnt != 0)
{
prevdt = lastdt;
if (info.banking_type == C140_TYPE.ASIC219)
{
lastdt = (sbyte)info.pRom[pSampleData + (pos ^ 0x01)];
// Sign + magnitude format
if ((v.mode & 0x01) != 0 && ((lastdt & 0x80) != 0))
{
lastdt = -(lastdt & 0x7f);
}
// Sign flip
if ((v.mode & 0x40) != 0)
{
lastdt = -lastdt;
}
}
else
{
lastdt = (sbyte)info.pRom[pSampleData + pos];
}
dltdt = (lastdt - prevdt);
}
/* Caclulate the sample value */
dt = ((dltdt * offset) >> 16) + prevdt;
/* Write the data to the sample buffers */
lmix[j] += (dt * lvol) >> 5;
rmix[j] += (dt * rvol) >> 5;
}
}
/* Save positional data for next callback */
v.ptoffset = offset;
v.pos = pos;
v.lastdt = lastdt;
v.prevdt = prevdt;
v.dltdt = dltdt;
}
/* render to MAME's stream buffer */
lmix = info.mixer_buffer_left;
rmix = info.mixer_buffer_right;
{
int[] dest1 = outputs[0];
int[] dest2 = outputs[1];
for (i = 0; i < samples; i++)
{
dest1[i] = lmix[i] << 3;
dest2[i] = rmix[i] << 3;
//if (debugCnt > 0)
//{
// debugCnt--;
// Console.WriteLine("{0:x} {0:d}", lmix[i]);
//}
}
}
visVolume[ChipID][0][0] = outputs[0][0];
visVolume[ChipID][0][1] = outputs[1][0];
}
private void c140_w(byte ChipID, uint offset, byte data)
{
//c140_state *info = get_safe_token(device);
c140_state info = C140Data[ChipID];
//info->stream->update();
offset &= 0x1ff;
// mirror the bank registers on the 219, fixes bkrtmaq (and probably xday2 based on notes in the HLE)
if ((offset >= 0x1f8) && (info.banking_type == C140_TYPE.ASIC219))
{
offset -= 8;
}
info.REG[offset] = data;
if (offset < 0x180)
{
VOICE v = info.voi[offset >> 4];
if ((offset & 0xf) == 0x5)
{
if ((data & 0x80) != 0)
{
//voice_registers vreg = (voice_registers)info.REG[offset & 0x1f0];
int vreg = (int)(offset & 0x1f0);
v.key = 1;
v.ptoffset = 0;
v.pos = 0;
v.lastdt = 0;
v.prevdt = 0;
v.dltdt = 0;
v.bank = info.REG[vreg + 4];// vreg.bank;
v.mode = data;
// on the 219 asic, addresses are in words
if (info.banking_type == C140_TYPE.ASIC219)
{
v.sample_loop = ((info.REG[vreg + 10] * 256) | info.REG[vreg + 11]) * 2;
v.sample_start = ((info.REG[vreg + 6] * 256) | info.REG[vreg + 7]) * 2;
v.sample_end = ((info.REG[vreg + 8] * 256) | info.REG[vreg + 9]) * 2;
//#if 0
//logerror("219: play v %d mode %02x start %x loop %x end %x\n",
// offset>>4, v->mode,
// find_sample(info, v->sample_start, v->bank, offset>>4),
// find_sample(info, v->sample_loop, v->bank, offset>>4),
// find_sample(info, v->sample_end, v->bank, offset>>4));
//#endif
}
else
{
v.sample_loop = (info.REG[vreg + 10] << 8) | info.REG[vreg + 11];
v.sample_start = (info.REG[vreg + 6] << 8) | info.REG[vreg + 7];
v.sample_end = (info.REG[vreg + 8] << 8) | info.REG[vreg + 9];
}
}
else
{
v.key = 0;
}
}
}
}
public override void Update(byte ChipID, int[][] outputs, int samples)
{
//c140_state *info = (c140_state *)param;
c140_state info = C140Data[ChipID];
int i, j;
int rvol, lvol;
int dt;
int sdt;
int st, ed, sz;
long pSampleData;
int frequency, delta, offset, pos;
int cnt, voicecnt;
int lastdt, prevdt, dltdt;
float pbase = (float)info.baserate * 2.0f / (float)info.sample_rate;
//System.Console.Write("pbase={0:f6} info->baserate={1:d} info->sample_rate={2:d} \n", pbase, info.baserate, info.sample_rate);
int[] lmix, rmix;
if (samples > info.sample_rate)
{
samples = info.sample_rate;
}
/* zap the contents of the mixer buffer */
for (int ind = 0; ind < samples; ind++)
{
info.mixer_buffer_left[ind] = 0;
info.mixer_buffer_right[ind] = 0;
}
if (info.pRom == null)
{
return;
}
//System.Console.WriteLine("c140_update");
/* get the number of voices to update */
voicecnt = (info.banking_type == C140_TYPE.ASIC219) ? 16 : 24;
//--- audio update
for (i = 0; i < voicecnt; i++)
{
VOICE v = info.voi[i];
//voice_registers vreg = (voice_registers)info.REG[i * 16];
int vreg = i * 16;
if (v.key != 0 && v.Muted == 0)
{
//System.Console.Write("voicecnt={0:d} ", i);
frequency = info.REG[vreg + 2] * 256 + info.REG[vreg + 3];
/* Abort voice if no frequency value set */
if (frequency == 0)
{
continue;
}
//System.Console.Write("frequency={0:d} ", frequency);
/* Delta = frequency * ((8MHz/374)*2 / sample rate) */
delta = (int)((float)frequency * pbase);
//System.Console.Write("delta={0:d} ", delta);
/* Calculate left/right channel volumes */
lvol = (info.REG[vreg + 1] * 32) / MAX_VOICE; //32ch -> 24ch
rvol = (info.REG[vreg + 0] * 32) / MAX_VOICE;
//System.Console.Write("MAX_VOICE={0} lvol={1} vreg->volume_left={2} ", MAX_VOICE, lvol, info.REG[vreg + 1]);
//System.Console.Write("rvol={0} vreg->volume_right={1} ", rvol, info.REG[vreg + 0]);
/* Set mixer outputs base pointers */
lmix = info.mixer_buffer_left;
rmix = info.mixer_buffer_right;
/* Retrieve sample start/end and calculate size */
st = (int)v.sample_start;
ed = (int)v.sample_end;
sz = ed - st;
//System.Console.Write("st={0} ed={1} ", st, ed);
/* Retrieve base pointer to the sample data */
//pSampleData=(signed char*)((FPTR)info->pRom + find_sample(info, st, v->bank, i));
//pSampleData = info.pRom[find_sample(info, st, v.bank, i)];
pSampleData = find_sample(info, st, v.bank, i);
//System.Console.Write("find_sample={0} ", find_sample(info, st, v.bank, i));
/* Fetch back previous data pointers */
offset = (int)v.ptoffset;
pos = (int)v.pos;
lastdt = (int)v.lastdt;
prevdt = (int)v.prevdt;
dltdt = (int)v.dltdt;
//System.Console.Write("offset={0} pos={1} lastdt={2} prevdt={3} dltdt={4} ", offset, pos, lastdt, prevdt, dltdt);
//System.Console.Write("v->mode={0} info->banking_type={1} ", v.mode, (int)info.banking_type);
/* Switch on data type - compressed PCM is only for C140 */
if ((v.mode & 8) != 0 && (info.banking_type != C140_TYPE.ASIC219))
{
//compressed PCM (maybe correct...)
/* Loop for enough to fill sample buffer as requested */
for (j = 0; j < samples; j++)
{
offset += delta;
cnt = (offset >> 16) & 0x7fff;
offset &= 0xffff;
pos += cnt;
//System.Console.Write("offset={0} cnt={1} pos={2} ", offset, cnt, pos);
//for(;cnt>0;cnt--)
{
/* Check for the end of the sample */
if (pos >= sz)
{
/* Check if its a looping sample, either stop or loop */
if ((v.mode & 0x10) != 0)
{
pos = (int)(v.sample_loop - st);
}
else
{
v.key = 0;
break;
}
}
/* Read the chosen sample byte */
//dt = info.pRom[pSampleData + pos];
dt = ((info.pRom[pSampleData + pos] & 0x80) != 0) ? (info.pRom[pSampleData + pos] - 256) : info.pRom[pSampleData + pos];
//System.Console.Write("dt={0} ", dt);
/* decompress to 13bit range */ //2000.06.26 CAB
sdt = dt >> 3; //signed
//System.Console.Write("sdt={0} ", sdt);
if (sdt < 0)
{
sdt = (sdt << (dt & 7)) - info.pcmtbl[dt & 7];
}
else
{
sdt = (sdt << (dt & 7)) + info.pcmtbl[dt & 7];
}
//System.Console.Write("sdt={0} info->pcmtbl[dt&7]={1} ", sdt, info.pcmtbl[dt & 7]);
prevdt = lastdt;
lastdt = sdt;
dltdt = (lastdt - prevdt);
//System.Console.Write("prevdt={0} lastdt={1} dltdt={2} ", prevdt, lastdt, dltdt);
}
/* Caclulate the sample value */
dt = ((dltdt * offset) >> 16) + prevdt;
//System.Console.Write("dt={0} ", dt);
/* Write the data to the sample buffers */
lmix[j] += (dt * lvol) >> (5 + 5);
rmix[j] += (dt * rvol) >> (5 + 5);
//System.Console.Write("(dt*lvol)>>(5+5)={0} ", (dt * lvol) >> (5 + 5));
//System.Console.Write("(dt*rvol)>>(5+5)={0} ", (dt * rvol) >> (5 + 5));
}
}
else
{
/* linear 8bit signed PCM */
for (j = 0; j < samples; j++)
{
offset += delta;
cnt = (offset >> 16) & 0x7fff;
offset &= 0xffff;
pos += cnt;
//System.Console.Write("linear offset={0} cnt={1} pos={2} ", offset, cnt, pos);
/* Check for the end of the sample */
if (pos >= sz)
{
/* Check if its a looping sample, either stop or loop */
if ((v.mode & 0x10) != 0)
{
pos = (int)(v.sample_loop - st);
}
else
{
v.key = 0;
break;
}
}
if (cnt != 0)
{
prevdt = lastdt;
if (info.banking_type == C140_TYPE.ASIC219)
{
//lastdt = pSampleData[BYTE_XOR_BE(pos)];
lastdt = (sbyte)info.pRom[pSampleData + (pos ^ 0x01)];
//System.Console.WriteLine("pos:{0} lastdt:{1}", pos, lastdt);
// Sign + magnitude format
if ((v.mode & 0x01) != 0 && ((lastdt & 0x80) != 0))
{
lastdt = -(lastdt & 0x7f);
//lastdt *= -1;
}
// Sign flip
if ((v.mode & 0x40) != 0)
{
lastdt = -lastdt;
}
//lastdt >>= 2;
}
else
{
lastdt = ((info.pRom[pSampleData + pos] & 0x80) != 0) ? (info.pRom[pSampleData + pos] - 256) : info.pRom[pSampleData + pos];
}
dltdt = (lastdt - prevdt);
//System.Console.Write("prevdt={0} lastdt={1} dltdt={2} ", prevdt, lastdt, dltdt);
}
/* Caclulate the sample value */
dt = ((dltdt * offset) >> 16) + prevdt;
//System.Console.Write("dt={0} ", dt);
/* Write the data to the sample buffers */
lmix[j] += (dt * lvol) >> 5;
rmix[j] += (dt * rvol) >> 5;
//System.Console.Write("(dt*lvol)>>5={0} ", (dt * lvol) >> 5);
//System.Console.Write("(dt*rvol)>>5={0} ", (dt * rvol) >> 5);
}
}
/* Save positional data for next callback */
v.ptoffset = offset;
v.pos = pos;
v.lastdt = lastdt;
v.prevdt = prevdt;
v.dltdt = dltdt;
//System.Console.Write("\n");
}
}
/* render to MAME's stream buffer */
lmix = info.mixer_buffer_left;
rmix = info.mixer_buffer_right;
{
int[] dest1 = outputs[0];
int[] dest2 = outputs[1];
for (i = 0; i < samples; i++)
{
//*dest1++ = limit(8*(*lmix++));
//*dest2++ = limit(8*(*rmix++));
dest1[i] = 8 * lmix[i];
dest2[i] = 8 * rmix[i];
}
}
visVolume[ChipID][0][0] = outputs[0][0];
visVolume[ChipID][0][1] = outputs[1][0];
}