// license:BSD-3-Clause
// copyright-holders:ElSemi, R. Belmont
// thanks-to: kingshriek
/*
Sega/Yamaha YMF292-F (SCSP = Saturn Custom Sound Processor) emulation
By ElSemi
MAME/M1 conversion and cleanup by R. Belmont
Additional code and bugfixes by kingshriek
This chip has 32 voices. Each voice can play a sample or be part of
an FM construct. Unlike traditional Yamaha FM chips, the base waveform
for the FM still comes from the wavetable RAM.
ChangeLog:
* November 25, 2003 (ES) Fixed buggy timers and envelope overflows.
(RB) Improved sample rates other than 44100, multiple
chips now works properly.
* December 02, 2003 (ES) Added DISDL register support, improves mix.
* April 28, 2004 (ES) Corrected envelope rates, added key-rate scaling,
added ringbuffer support.
* January 8, 2005 (RB) Added ability to specify region offset for RAM.
* January 26, 2007 (ES) Added on-board DSP capability
* September 24, 2007 (RB+ES) Removed fake reverb. Rewrote timers and IRQ handling.
Fixed case where voice frequency is updated while looping.
Enabled DSP again.
* December 16, 2007 (kingshriek) Many EG bug fixes, implemented effects mixer,
implemented FM.
* January 5, 2008 (kingshriek+RB) Working, good-sounding FM, removed obsolete non-USEDSP code.
* April 22, 2009 ("PluginNinja") Improved slot monitor, misc cleanups
* June 6, 2011 (AS) Rewrote DMA from scratch, Darius 2 relies on it.
*/
// TODO : Envelope/LFO times are based on 44100Hz case?
#include "emu.h"
#include "scsp.h"
#include <algorithm>
static constexpr s32 clip16(int x) { return std::min(32767, std::max(-32768, x)); }
static constexpr s32 clip18(int x) { return std::min(131071, std::max(-131072, x)); }
#define SHIFT 12
#define LFO_SHIFT 8
#define FIX(v) ((u32) ((float) (1 << SHIFT) * (v)))
#define EG_SHIFT 16
/*
SCSP features 32 programmable slots
that can generate FM and PCM (from ROM/RAM) sound
*/
//SLOT PARAMETERS
#define KEYONEX(slot) ((slot->udata.data[0x0] >> 0x0) & 0x1000)
#define KEYONB(slot) ((slot->udata.data[0x0] >> 0x0) & 0x0800)
#define SBCTL(slot) ((slot->udata.data[0x0] >> 0x9) & 0x0003)
#define SSCTL(slot) ((slot->udata.data[0x0] >> 0x7) & 0x0003)
#define LPCTL(slot) ((slot->udata.data[0x0] >> 0x5) & 0x0003)
#define PCM8B(slot) ((slot->udata.data[0x0] >> 0x0) & 0x0010)
#define SA(slot) (((slot->udata.data[0x0] & 0xF) << 16) | (slot->udata.data[0x1]))
#define LSA(slot) (slot->udata.data[0x2])
#define LEA(slot) (slot->udata.data[0x3])
#define D2R(slot) ((slot->udata.data[0x4] >> 0xB) & 0x001F)
#define D1R(slot) ((slot->udata.data[0x4] >> 0x6) & 0x001F)
#define EGHOLD(slot) ((slot->udata.data[0x4] >> 0x0) & 0x0020)
#define AR(slot) ((slot->udata.data[0x4] >> 0x0) & 0x001F)
#define LPSLNK(slot) ((slot->udata.data[0x5] >> 0x0) & 0x4000)
#define KRS(slot) ((slot->udata.data[0x5] >> 0xA) & 0x000F)
#define DL(slot) ((slot->udata.data[0x5] >> 0x5) & 0x001F)
#define RR(slot) ((slot->udata.data[0x5] >> 0x0) & 0x001F)
#define STWINH(slot) ((slot->udata.data[0x6] >> 0x0) & 0x0200)
#define SDIR(slot) ((slot->udata.data[0x6] >> 0x0) & 0x0100)
#define TL(slot) ((slot->udata.data[0x6] >> 0x0) & 0x00FF)
#define MDL(slot) ((slot->udata.data[0x7] >> 0xC) & 0x000F)
#define MDXSL(slot) ((slot->udata.data[0x7] >> 0x6) & 0x003F)
#define MDYSL(slot) ((slot->udata.data[0x7] >> 0x0) & 0x003F)
#define OCT(slot) ((slot->udata.data[0x8] >> 0xB) & 0x000F)
#define FNS(slot) ((slot->udata.data[0x8] >> 0x0) & 0x03FF)
#define LFORE(slot) ((slot->udata.data[0x9] >> 0x0) & 0x8000)
#define LFOF(slot) ((slot->udata.data[0x9] >> 0xA) & 0x001F)
#define PLFOWS(slot) ((slot->udata.data[0x9] >> 0x8) & 0x0003)
#define PLFOS(slot) ((slot->udata.data[0x9] >> 0x5) & 0x0007)
#define ALFOWS(slot) ((slot->udata.data[0x9] >> 0x3) & 0x0003)
#define ALFOS(slot) ((slot->udata.data[0x9] >> 0x0) & 0x0007)
#define ISEL(slot) ((slot->udata.data[0xA] >> 0x3) & 0x000F)
#define IMXL(slot) ((slot->udata.data[0xA] >> 0x0) & 0x0007)
#define DISDL(slot) ((slot->udata.data[0xB] >> 0xD) & 0x0007)
#define DIPAN(slot) ((slot->udata.data[0xB] >> 0x8) & 0x001F)
#define EFSDL(slot) ((slot->udata.data[0xB] >> 0x5) & 0x0007)
#define EFPAN(slot) ((slot->udata.data[0xB] >> 0x0) & 0x001F)
//Envelope times in ms
static const double ARTimes[64] = {100000/*infinity*/,100000/*infinity*/,8100.0,6900.0,6000.0,4800.0,4000.0,3400.0,3000.0,2400.0,2000.0,1700.0,1500.0,
1200.0,1000.0,860.0,760.0,600.0,500.0,430.0,380.0,300.0,250.0,220.0,190.0,150.0,130.0,110.0,95.0,
76.0,63.0,55.0,47.0,38.0,31.0,27.0,24.0,19.0,15.0,13.0,12.0,9.4,7.9,6.8,6.0,4.7,3.8,3.4,3.0,2.4,
2.0,1.8,1.6,1.3,1.1,0.93,0.85,0.65,0.53,0.44,0.40,0.35,0.0,0.0};
static const double DRTimes[64] = {100000/*infinity*/,100000/*infinity*/,118200.0,101300.0,88600.0,70900.0,59100.0,50700.0,44300.0,35500.0,29600.0,25300.0,22200.0,17700.0,
14800.0,12700.0,11100.0,8900.0,7400.0,6300.0,5500.0,4400.0,3700.0,3200.0,2800.0,2200.0,1800.0,1600.0,1400.0,1100.0,
920.0,790.0,690.0,550.0,460.0,390.0,340.0,270.0,230.0,200.0,170.0,140.0,110.0,98.0,85.0,68.0,57.0,49.0,43.0,34.0,
28.0,25.0,22.0,18.0,14.0,12.0,11.0,8.5,7.1,6.1,5.4,4.3,3.6,3.1};
#define MEM4B() ((m_udata.data[0] >> 0x0) & 0x0200)
#define DAC18B() ((m_udata.data[0] >> 0x0) & 0x0100)
#define MVOL() ((m_udata.data[0] >> 0x0) & 0x000F)
#define RBL() ((m_udata.data[1] >> 0x7) & 0x0003)
#define RBP() ((m_udata.data[1] >> 0x0) & 0x003F)
#define MOFULL() ((m_udata.data[2] >> 0x0) & 0x1000)
#define MOEMPTY() ((m_udata.data[2] >> 0x0) & 0x0800)
#define MIOVF() ((m_udata.data[2] >> 0x0) & 0x0400)
#define MIFULL() ((m_udata.data[2] >> 0x0) & 0x0200)
#define MIEMPTY() ((m_udata.data[2] >> 0x0) & 0x0100)
#define SCILV0() ((m_udata.data[0x24/2] >> 0x0) & 0xff)
#define SCILV1() ((m_udata.data[0x26/2] >> 0x0) & 0xff)
#define SCILV2() ((m_udata.data[0x28/2] >> 0x0) & 0xff)
#define SCIEX0 0
#define SCIEX1 1
#define SCIEX2 2
#define SCIMID 3
#define SCIDMA 4
#define SCIIRQ 5
#define SCITMA 6
#define SCITMB 7
#define USEDSP
/* TODO */
//#define dma_transfer_end ((scsp_regs[0x24/2] & 0x10) >> 4) | (((scsp_regs[0x26/2] & 0x10) >> 4) << 1) | (((scsp_regs[0x28/2] & 0x10) >> 4) << 2)
static const float SDLT[8] = {-1000000.0f,-36.0f,-30.0f,-24.0f,-18.0f,-12.0f,-6.0f,0.0f};
DEFINE_DEVICE_TYPE(SCSP, scsp_device, "scsp", "Yamaha YMF292-F SCSP")
scsp_device::scsp_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, SCSP, tag, owner, clock),
device_sound_interface(mconfig, *this),
device_rom_interface(mconfig, *this, 20, ENDIANNESS_BIG, 16),
m_irq_cb(*this),
m_main_irq_cb(*this),
m_BUFPTR(0),
m_stream(nullptr),
m_IrqTimA(0),
m_IrqTimBC(0),
m_IrqMidi(0),
m_MidiOutW(0),
m_MidiOutR(0),
m_MidiW(0),
m_MidiR(0),
m_timerA(nullptr),
m_timerB(nullptr),
m_timerC(nullptr),
m_mcieb(0),
m_mcipd(0),
m_bufferl(nullptr),
m_bufferr(nullptr),
m_exts0(nullptr),
m_exts1(nullptr),
m_length(0),
m_RBUFDST(nullptr)
{
std::fill(std::begin(m_RINGBUF), std::end(m_RINGBUF), 0);
std::fill(std::begin(m_MidiStack), std::end(m_MidiStack), 0);
std::fill(std::begin(m_LPANTABLE), std::end(m_LPANTABLE), 0);
std::fill(std::begin(m_RPANTABLE), std::end(m_RPANTABLE), 0);
std::fill(std::begin(m_TimPris), std::end(m_TimPris), 0);
std::fill(std::begin(m_ARTABLE), std::end(m_ARTABLE), 0);
std::fill(std::begin(m_DRTABLE), std::end(m_DRTABLE), 0);
std::fill(std::begin(m_EG_TABLE), std::end(m_EG_TABLE), 0);
std::fill(std::begin(m_PLFO_TRI), std::end(m_PLFO_TRI), 0);
std::fill(std::begin(m_PLFO_SQR), std::end(m_PLFO_SQR), 0);
std::fill(std::begin(m_PLFO_SAW), std::end(m_PLFO_SAW), 0);
std::fill(std::begin(m_PLFO_NOI), std::end(m_PLFO_NOI), 0);
std::fill(std::begin(m_ALFO_TRI), std::end(m_ALFO_TRI), 0);
std::fill(std::begin(m_ALFO_SQR), std::end(m_ALFO_SQR), 0);
std::fill(std::begin(m_ALFO_SAW), std::end(m_ALFO_SAW), 0);
std::fill(std::begin(m_ALFO_NOI), std::end(m_ALFO_NOI), 0);
std::fill(std::begin(m_ALFO_NOI), std::end(m_ALFO_NOI), 0);
memset(m_PSCALES, 0, sizeof(m_PSCALES));
memset(m_ASCALES, 0, sizeof(m_ASCALES));
memset(&m_Slots, 0, sizeof(m_Slots));
memset(&m_udata.data, 0, sizeof(m_udata.data));
m_TimCnt[0] = 0;
m_TimCnt[1] = 0;
m_TimCnt[2] = 0;
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void scsp_device::device_start()
{
// init the emulation
init();
// set up the IRQ callbacks
m_irq_cb.resolve_safe();
m_main_irq_cb.resolve_safe();
// Stereo output with EXTS0,1 Input (External digital audio output)
m_stream = machine().sound().stream_alloc(*this, 2, 2, clock() / 512);
for (int slot = 0; slot < 32; slot++)
{
for (int i = 0; i < 0x10; i++)
save_item(NAME(m_Slots[slot].udata.data[i]), (i << 8) | slot);
save_item(NAME(m_Slots[slot].Backwards), slot);
save_item(NAME(m_Slots[slot].active), slot);
save_item(NAME(m_Slots[slot].cur_addr), slot);
save_item(NAME(m_Slots[slot].nxt_addr), slot);
save_item(NAME(m_Slots[slot].step), slot);
save_item(NAME(m_Slots[slot].EG.volume), slot);
save_item(NAME(m_Slots[slot].EG.step), slot);
save_item(NAME(m_Slots[slot].EG.AR), slot);
save_item(NAME(m_Slots[slot].EG.D1R), slot);
save_item(NAME(m_Slots[slot].EG.D2R), slot);
save_item(NAME(m_Slots[slot].EG.RR), slot);
save_item(NAME(m_Slots[slot].EG.DL), slot);
save_item(NAME(m_Slots[slot].EG.EGHOLD), slot);
save_item(NAME(m_Slots[slot].EG.LPLINK), slot);
save_item(NAME(m_Slots[slot].PLFO.phase), slot);
save_item(NAME(m_Slots[slot].PLFO.phase_step), slot);
save_item(NAME(m_Slots[slot].ALFO.phase), slot);
save_item(NAME(m_Slots[slot].ALFO.phase_step), slot);
}
for (int i = 0; i < 0x30/2; i++)
{
save_item(NAME(m_udata.data[i]), i);
}
save_item(NAME(m_RINGBUF));
save_item(NAME(m_BUFPTR));
#if SCSP_FM_DELAY
save_item(NAME(m_DELAYBUF));
save_item(NAME(m_DELAYPTR));
#endif
save_item(NAME(m_IrqTimA));
save_item(NAME(m_IrqTimBC));
save_item(NAME(m_IrqMidi));
save_item(NAME(m_MidiOutW));
save_item(NAME(m_MidiOutR));
save_item(NAME(m_MidiStack));
save_item(NAME(m_MidiW));
save_item(NAME(m_MidiR));
save_item(NAME(m_TimPris));
save_item(NAME(m_TimCnt));
save_item(NAME(m_dma.dmea));
save_item(NAME(m_dma.drga));
save_item(NAME(m_dma.dtlg));
save_item(NAME(m_dma.dgate));
save_item(NAME(m_dma.ddir));
save_item(NAME(m_mcieb));
save_item(NAME(m_mcipd));
save_item(NAME(m_DSP.RBP));
save_item(NAME(m_DSP.RBL));
save_item(NAME(m_DSP.COEF));
save_item(NAME(m_DSP.MADRS));
save_item(NAME(m_DSP.MPRO));
save_item(NAME(m_DSP.TEMP));
save_item(NAME(m_DSP.MEMS));
save_item(NAME(m_DSP.DEC));
save_item(NAME(m_DSP.MIXS));
save_item(NAME(m_DSP.EXTS));
save_item(NAME(m_DSP.EFREG));
save_item(NAME(m_DSP.Stopped));
save_item(NAME(m_DSP.LastStep));
}
//-------------------------------------------------
// device_post_load - called after loading a saved state
//-------------------------------------------------
void scsp_device::device_post_load()
{
for (int slot = 0; slot < 32; slot++)
Compute_LFO(&m_Slots[slot]);
m_stream->set_output_gain(0, MVOL() / 15.0);
m_stream->set_output_gain(1, MVOL() / 15.0);
}
//-------------------------------------------------
// device_clock_changed - called if the clock
// changes
//-------------------------------------------------
void scsp_device::device_clock_changed()
{
m_stream->set_sample_rate(clock() / 512);
}
void scsp_device::rom_bank_updated()
{
m_stream->update();
}
//-------------------------------------------------
// sound_stream_update - handle a stream update
//-------------------------------------------------
void scsp_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
m_exts0 = inputs[0];
m_exts1 = inputs[1];
m_bufferl = outputs[0];
m_bufferr = outputs[1];
m_length = samples;
DoMasterSamples(samples);
}
u8 scsp_device::DecodeSCI(u8 irq)
{
u8 SCI = 0;
u8 v;
v = (SCILV0() & (1 << irq)) ? 1 : 0;
SCI |= v;
v = (SCILV1() & (1 << irq)) ? 1 : 0;
SCI |= v << 1;
v = (SCILV2() & (1 << irq)) ? 1 : 0;
SCI |= v << 2;
return SCI;
}
void scsp_device::CheckPendingIRQ()
{
u32 pend = m_udata.data[0x20/2];
u32 en = m_udata.data[0x1e/2];
if (m_MidiW != m_MidiR)
{
m_udata.data[0x20/2] |= 8;
pend |= 8;
}
if (!pend)
return;
if (pend & 0x40)
if (en & 0x40)
{
m_irq_cb(m_IrqTimA, ASSERT_LINE);
return;
}
if (pend & 0x80)
if (en & 0x80)
{
m_irq_cb(m_IrqTimBC, ASSERT_LINE);
return;
}
if (pend & 0x100)
if (en & 0x100)
{
m_irq_cb(m_IrqTimBC, ASSERT_LINE);
return;
}
if (pend & 8)
if (en & 8)
{
m_irq_cb(m_IrqMidi, ASSERT_LINE);
m_udata.data[0x20/2] &= ~8;
return;
}
m_irq_cb((offs_t)0, CLEAR_LINE);
}
void scsp_device::MainCheckPendingIRQ(u16 irq_type)
{
m_mcipd |= irq_type;
//machine().scheduler().synchronize(); // force resync
if (m_mcipd & m_mcieb)
m_main_irq_cb(1);
else
m_main_irq_cb(0);
}
void scsp_device::ResetInterrupts()
{
u32 reset = m_udata.data[0x22/2];
if (reset & 0x40)
{
m_irq_cb(m_IrqTimA, CLEAR_LINE);
}
if (reset & 0x180)
{
m_irq_cb(m_IrqTimBC, CLEAR_LINE);
}
if (reset & 0x8)
{
m_irq_cb(m_IrqMidi, CLEAR_LINE);
}
CheckPendingIRQ();
}
TIMER_CALLBACK_MEMBER(scsp_device::timerA_cb)
{
m_TimCnt[0] = 0xFFFF;
m_udata.data[0x20/2] |= 0x40;
m_udata.data[0x18/2] &= 0xff00;
m_udata.data[0x18/2] |= m_TimCnt[0] >> 8;
CheckPendingIRQ();
MainCheckPendingIRQ(0x40);
}
TIMER_CALLBACK_MEMBER(scsp_device::timerB_cb)
{
m_TimCnt[1] = 0xFFFF;
m_udata.data[0x20/2] |= 0x80;
m_udata.data[0x1a/2] &= 0xff00;
m_udata.data[0x1a/2] |= m_TimCnt[1] >> 8;
CheckPendingIRQ();
}
TIMER_CALLBACK_MEMBER(scsp_device::timerC_cb)
{
m_TimCnt[2] = 0xFFFF;
m_udata.data[0x20/2] |= 0x100;
m_udata.data[0x1c/2] &= 0xff00;
m_udata.data[0x1c/2] |= m_TimCnt[2] >> 8;
CheckPendingIRQ();
}
int scsp_device::Get_AR(int base, int R)
{
int Rate = base + (R << 1);
return m_ARTABLE[std::min(63, std::max(0, Rate))];
}
int scsp_device::Get_DR(int base, int R)
{
int Rate = base + (R << 1);
return m_DRTABLE[std::min(63, std::max(0, Rate))];
}
void scsp_device::Compute_EG(SCSP_SLOT *slot)
{
int octave = (OCT(slot) ^ 8) - 8;
int rate;
if (KRS(slot) != 0xf)
rate = octave + 2 * KRS(slot) + ((FNS(slot) >> 9) & 1);
else
rate = 0; //rate = ((FNS(slot) >> 9) & 1);
slot->EG.volume = 0x17F<<EG_SHIFT;
slot->EG.AR = Get_AR(rate,AR(slot));
slot->EG.D1R = Get_DR(rate,D1R(slot));
slot->EG.D2R = Get_DR(rate,D2R(slot));
slot->EG.RR = Get_DR(rate,RR(slot));
slot->EG.DL = 0x1f - DL(slot);
slot->EG.EGHOLD = EGHOLD(slot);
}
int scsp_device::EG_Update(SCSP_SLOT *slot)
{
switch (slot->EG.state)
{
case SCSP_ATTACK:
slot->EG.volume += slot->EG.AR;
if (slot->EG.volume >= (0x3ff<<EG_SHIFT))
{
if (!LPSLNK(slot))
{
slot->EG.state = SCSP_DECAY1;
if (slot->EG.D1R >= (1024 << EG_SHIFT)) //Skip SCSP_DECAY1, go directly to SCSP_DECAY2
slot->EG.state = SCSP_DECAY2;
}
slot->EG.volume=0x3ff << EG_SHIFT;
}
if (slot->EG.EGHOLD)
return 0x3ff << (SHIFT - 10);
break;
case SCSP_DECAY1:
slot->EG.volume -= slot->EG.D1R;
if (slot->EG.volume <= 0)
slot->EG.volume = 0;
if (slot->EG.volume >> (EG_SHIFT + 5) <= slot->EG.DL)
slot->EG.state = SCSP_DECAY2;
break;
case SCSP_DECAY2:
if (D2R(slot) == 0)
return (slot->EG.volume >> EG_SHIFT) << (SHIFT - 10);
slot->EG.volume -= slot->EG.D2R;
if (slot->EG.volume <= 0)
slot->EG.volume = 0;
break;
case SCSP_RELEASE:
slot->EG.volume -= slot->EG.RR;
if (slot->EG.volume <= 0)
{
slot->EG.volume = 0;
StopSlot(slot, 0);
//slot->EG.volume = 0x17F << EG_SHIFT;
//slot->EG.state = SCSP_ATTACK;
}
break;
default:
return 1 << SHIFT;
}
return (slot->EG.volume >> EG_SHIFT) << (SHIFT - 10);
}
u32 scsp_device::Step(SCSP_SLOT *slot)
{
int octave = (OCT(slot) ^ 8) - 8 + SHIFT - 10;
u32 Fn = FNS(slot) + (1 << 10);
if (octave >= 0)
{
Fn <<= octave;
}
else
{
Fn >>= -octave;
}
return Fn;
}
void scsp_device::Compute_LFO(SCSP_SLOT *slot)
{
if (PLFOS(slot) != 0)
LFO_ComputeStep(&(slot->PLFO), LFOF(slot), PLFOWS(slot), PLFOS(slot), 0);
if (ALFOS(slot) != 0)
LFO_ComputeStep(&(slot->ALFO), LFOF(slot), ALFOWS(slot), ALFOS(slot), 1);
}
void scsp_device::StartSlot(SCSP_SLOT *slot)
{
slot->active = 1;
slot->cur_addr = 0;
slot->nxt_addr = 1 << SHIFT;
slot->step = Step(slot);
Compute_EG(slot);
slot->EG.state = SCSP_ATTACK;
slot->EG.volume = 0x17F << EG_SHIFT;
slot->Prev = 0;
slot->Backwards = 0;
Compute_LFO(slot);
// printf("StartSlot[%p]: SA %x PCM8B %x LPCTL %x ALFOS %x STWINH %x TL %x EFSDL %x\n", slot, SA(slot), PCM8B(slot), LPCTL(slot), ALFOS(slot), STWINH(slot), TL(slot), EFSDL(slot));
}
void scsp_device::StopSlot(SCSP_SLOT *slot,int keyoff)
{
if (keyoff /*&& slot->EG.state!=SCSP_RELEASE*/)
{
slot->EG.state = SCSP_RELEASE;
}
else
{
slot->active = 0;
}
slot->udata.data[0] &= ~0x800;
}
void scsp_device::init()
{
int i;
m_DSP.Init();
m_IrqTimA = m_IrqTimBC = m_IrqMidi = 0;
m_MidiR=m_MidiW = 0;
m_MidiOutR = m_MidiOutW = 0;
m_DSP.space = &this->space();
m_timerA = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(scsp_device::timerA_cb), this));
m_timerB = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(scsp_device::timerB_cb), this));
m_timerC = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(scsp_device::timerC_cb), this));
for (i = 0; i < 0x400; ++i)
{
float envDB = ((float)(3 * (i - 0x3ff))) / 32.0f;
float scale = (float)(1 << SHIFT);
m_EG_TABLE[i] = (s32)(powf(10.0f, envDB / 20.0f) * scale);
}
for (i = 0; i < 0x10000; ++i)
{
int iTL = (i >> 0x0) & 0xff;
int iPAN = (i >> 0x8) & 0x1f;
int iSDL = (i >> 0xD) & 0x07;
float TL;
float SegaDB = 0.0f;
float fSDL;
float PAN;
float LPAN,RPAN;
if (iTL & 0x01) SegaDB -= 0.4f;
if (iTL & 0x02) SegaDB -= 0.8f;
if (iTL & 0x04) SegaDB -= 1.5f;
if (iTL & 0x08) SegaDB -= 3.0f;
if (iTL & 0x10) SegaDB -= 6.0f;
if (iTL & 0x20) SegaDB -= 12.0f;
if (iTL & 0x40) SegaDB -= 24.0f;
if (iTL & 0x80) SegaDB -= 48.0f;
TL=powf(10.0f, SegaDB / 20.0f);
SegaDB=0;
if (iPAN & 0x1) SegaDB -= 3.0f;
if (iPAN & 0x2) SegaDB -= 6.0f;
if (iPAN & 0x4) SegaDB -= 12.0f;
if (iPAN & 0x8) SegaDB -= 24.0f;
if ((iPAN & 0xf) == 0xf) PAN = 0.0;
else PAN=powf(10.0f, SegaDB / 20.0f);
if (iPAN < 0x10)
{
LPAN = PAN;
RPAN = 1.0;
}
else
{
RPAN = PAN;
LPAN = 1.0;
}
if (iSDL)
fSDL = powf(10.0f, (SDLT[iSDL]) / 20.0f);
else
fSDL = 0.0;
m_LPANTABLE[i] = FIX((4.0f * LPAN * TL * fSDL));
m_RPANTABLE[i] = FIX((4.0f * RPAN * TL * fSDL));
}
m_ARTABLE[0] = m_DRTABLE[0] = 0; //Infinite time
m_ARTABLE[1] = m_DRTABLE[1] = 0; //Infinite time
for (i = 2; i < 64; ++i)
{
double step, scale;
double t = ARTimes[i]; //In ms
if (t != 0.0)
{
step = (1023 * 1000.0) / (44100.0 * t);
scale = (double) (1 << EG_SHIFT);
m_ARTABLE[i] = (int) (step * scale);
}
else
m_ARTABLE[i] = 1024 << EG_SHIFT;
t = DRTimes[i]; //In ms
step = (1023 * 1000.0) / (44100.0 * t);
scale = (double) (1 << EG_SHIFT);
m_DRTABLE[i] = (int) (step * scale);
}
// make sure all the slots are off
for (i = 0; i < 32; ++i)
{
m_Slots[i].slot = i;
m_Slots[i].active = 0;
m_Slots[i].EG.state = SCSP_RELEASE;
}
LFO_Init();
// no "pend"
m_udata.data[0x20/2] = 0;
m_TimCnt[0] = 0xffff;
m_TimCnt[1] = 0xffff;
m_TimCnt[2] = 0xffff;
}
void scsp_device::UpdateSlotReg(int s,int r)
{
SCSP_SLOT *slot = m_Slots + s;
switch (r & 0x3f)
{
case 0:
case 1:
if (KEYONEX(slot))
{
for (int sl=0; sl < 32; ++sl)
{
SCSP_SLOT *s2 = m_Slots + sl;
{
if (KEYONB(s2) && s2->EG.state == SCSP_RELEASE/*&& !s2->active*/)
{
StartSlot(s2);
}
if (!KEYONB(s2) /*&& s2->active*/)
{
StopSlot(s2, 1);
}
}
}
slot->udata.data[0] &= ~0x1000;
}
break;
case 0x10:
case 0x11:
slot->step = Step(slot);
break;
case 0xA:
case 0xB:
slot->EG.RR = Get_DR(0, RR(slot));
slot->EG.DL = 0x1f - DL(slot);
break;
case 0x12:
case 0x13:
Compute_LFO(slot);
break;
}
}
void scsp_device::UpdateReg(int reg)
{
switch (reg & 0x3f)
{
case 0x0:
m_stream->set_output_gain(0, MVOL() / 15.0);
m_stream->set_output_gain(1, MVOL() / 15.0);
break;
case 0x2:
case 0x3:
{
m_DSP.RBL = (8 * 1024) << RBL(); // 8 / 16 / 32 / 64 kwords
m_DSP.RBP = RBP();
}
break;
case 0x6:
case 0x7:
midi_in(m_udata.data[0x6/2] & 0xff);
break;
case 8:
case 9:
/* Only MSLC could be written. */
m_udata.data[0x8/2] &= 0xf800; /**< @todo Docs claims MSLC to be 0x7800, but Jikkyou Parodius doesn't agree. */
break;
case 0x12:
case 0x13:
m_dma.dmea = (m_udata.data[0x12/2] & 0xfffe) | (m_dma.dmea & 0xf0000);
break;
case 0x14:
case 0x15:
m_dma.dmea = ((m_udata.data[0x14/2] & 0xf000) << 4) | (m_dma.dmea & 0xfffe);
m_dma.drga = (m_udata.data[0x14/2] & 0x0ffe);
break;
case 0x16:
case 0x17:
m_dma.dtlg = (m_udata.data[0x16/2] & 0x0ffe);
m_dma.ddir = (m_udata.data[0x16/2] & 0x2000) >> 13;
m_dma.dgate = (m_udata.data[0x16/2] & 0x4000) >> 14;
if (m_udata.data[0x16/2] & 0x1000) // dexe
exec_dma();
break;
case 0x18:
case 0x19:
if (!m_irq_cb.isnull())
{
m_TimPris[0] = 1 << ((m_udata.data[0x18/2] >> 8) & 0x7);
m_TimCnt[0] = (m_udata.data[0x18/2] & 0xff) << 8;
if ((m_udata.data[0x18/2] & 0xff) != 255)
{
u32 time = (clock() / m_TimPris[0]) / (255 - (m_udata.data[0x18/2] & 0xff));
if (time)
{
m_timerA->adjust(attotime::from_ticks(512, time));
}
}
}
break;
case 0x1a:
case 0x1b:
if (!m_irq_cb.isnull())
{
m_TimPris[1] = 1 << ((m_udata.data[0x1A/2] >> 8) & 0x7);
m_TimCnt[1] = (m_udata.data[0x1A/2] & 0xff) << 8;
if ((m_udata.data[0x1A/2] & 0xff) != 255)
{
u32 time = (clock() / m_TimPris[1]) / (255 - (m_udata.data[0x1A/2] & 0xff));
if (time)
{
m_timerB->adjust(attotime::from_ticks(512, time));
}
}
}
break;
case 0x1C:
case 0x1D:
if (!m_irq_cb.isnull())
{
m_TimPris[2] = 1 << ((m_udata.data[0x1C/2] >> 8) & 0x7);
m_TimCnt[2] = (m_udata.data[0x1C/2] & 0xff) << 8;
if ((m_udata.data[0x1C/2] & 0xff) != 255)
{
u32 time = (clock() / m_TimPris[2]) / (255 - (m_udata.data[0x1C/2] & 0xff));
if (time)
{
m_timerC->adjust(attotime::from_ticks(512, time));
}
}
}
break;
case 0x1e: // SCIEB
case 0x1f:
if (!m_irq_cb.isnull())
{
CheckPendingIRQ();
if (m_udata.data[0x1e/2] & 0x610)
popmessage("SCSP SCIEB enabled %04x, contact MAMEdev",m_udata.data[0x1e/2]);
}
break;
case 0x20: // SCIPD
case 0x21:
if (!m_irq_cb.isnull())
{
if (m_udata.data[0x1e/2] & m_udata.data[0x20/2] & 0x20)
popmessage("SCSP SCIPD write %04x, contact MAMEdev",m_udata.data[0x20/2]);
}
break;
case 0x22: //SCIRE
case 0x23:
if (!m_irq_cb.isnull())
{
m_udata.data[0x20/2] &= ~m_udata.data[0x22/2];
ResetInterrupts();
// behavior from real hardware: if you SCIRE a timer that's expired,
// it'll immediately pop up again in SCIPD. ask Sakura Taisen on the Saturn...
if (m_TimCnt[0] == 0xffff)
{
m_udata.data[0x20/2] |= 0x40;
}
if (m_TimCnt[1] == 0xffff)
{
m_udata.data[0x20/2] |= 0x80;
}
if (m_TimCnt[2] == 0xffff)
{
m_udata.data[0x20/2] |= 0x100;
}
}
break;
case 0x24:
case 0x25:
case 0x26:
case 0x27:
case 0x28:
case 0x29:
if (!m_irq_cb.isnull())
{
m_IrqTimA = DecodeSCI(SCITMA);
m_IrqTimBC = DecodeSCI(SCITMB);
m_IrqMidi = DecodeSCI(SCIMID);
}
break;
case 0x2a:
case 0x2b:
m_mcieb = m_udata.data[0x2a/2];
MainCheckPendingIRQ(0);
if (m_mcieb & ~0x60)
popmessage("SCSP MCIEB enabled %04x, contact MAMEdev",m_mcieb);
break;
case 0x2c:
case 0x2d:
if (m_udata.data[0x2c/2] & 0x20)
MainCheckPendingIRQ(0x20);
break;
case 0x2e:
case 0x2f:
m_mcipd &= ~m_udata.data[0x2e/2];
MainCheckPendingIRQ(0);
break;
}
}
void scsp_device::UpdateSlotRegR(int slot,int reg)
{
}
void scsp_device::UpdateRegR(int reg)
{
switch (reg & 0x3f)
{
case 4:
case 5:
{
u16 v = m_udata.data[0x4/2];
v &= 0xff00;
v |= m_MidiStack[m_MidiR];
m_irq_cb(m_IrqMidi, CLEAR_LINE); // cancel the IRQ
logerror("Read %x from SCSP MIDI\n", v);
if (m_MidiR != m_MidiW)
{
++m_MidiR;
m_MidiR &= 31;
}
m_udata.data[0x4/2] = v;
}
break;
case 8:
case 9:
{
// MSLC | CA |SGC|EG
// f e d c b a 9 8 7 6 5 4 3 2 1 0
u8 MSLC = (m_udata.data[0x8/2] >> 11) & 0x1f;
SCSP_SLOT *slot = m_Slots + MSLC;
u32 SGC = (slot->EG.state) & 3;
u32 CA = (slot->cur_addr >> (SHIFT + 12)) & 0xf;
u32 EG = (0x1f - (slot->EG.volume >> (EG_SHIFT + 5))) & 0x1f;
/* note: according to the manual MSLC is write only, CA, SGC and EG read only. */
m_udata.data[0x8/2] = /*(MSLC << 11) |*/ (CA << 7) | (SGC << 5) | EG;
}
break;
case 0x18:
case 0x19:
break;
case 0x1a:
case 0x1b:
break;
case 0x1c:
case 0x1d:
break;
case 0x2a:
case 0x2b:
m_udata.data[0x2a/2] = m_mcieb;
break;
case 0x2c:
case 0x2d:
m_udata.data[0x2c/2] = m_mcipd;
break;
}
}
void scsp_device::w16(u32 addr, u16 val)
{
addr &= 0xffff;
if (addr < 0x400)
{
int slot = addr / 0x20;
addr &= 0x1f;
*((u16 *) (m_Slots[slot].udata.datab + (addr))) = val;
UpdateSlotReg(slot, addr & 0x1f);
}
else if (addr < 0x600)
{
if (addr < 0x430)
{
*((u16 *) (m_udata.datab + ((addr & 0x3f)))) = val;
UpdateReg(addr & 0x3f);
}
}
else if (addr < 0x700)
m_RINGBUF[(addr - 0x600)/2] = val;
else
{
//DSP
if (addr < 0x780) //COEF
*((u16 *) (m_DSP.COEF + (addr - 0x700) / 2)) = val;
else if (addr < 0x7c0)
*((u16 *) (m_DSP.MADRS + (addr - 0x780) / 2)) = val;
else if (addr < 0x800) // MADRS is mirrored twice
*((u16 *) (m_DSP.MADRS + (addr - 0x7c0) / 2)) = val;
else if (addr < 0xC00)
{
*((uint16_t *) (m_DSP.MPRO + (addr - 0x800) / 2)) = val;
if (addr == 0xBF0)
{
m_DSP.Start();
}
}
}
}
u16 scsp_device::r16(u32 addr)
{
u16 v = 0;
addr &= 0xffff;
if (addr < 0x400)
{
int slot = addr / 0x20;
addr &= 0x1f;
UpdateSlotRegR(slot, addr & 0x1f);
v = *((u16 *) (m_Slots[slot].udata.datab + (addr)));
}
else if (addr < 0x600)
{
if (addr < 0x430)
{
UpdateRegR(addr & 0x3f);
v = *((u16 *) (m_udata.datab + ((addr & 0x3f))));
}
}
else if (addr < 0x700)
v = m_RINGBUF[(addr-0x600)/2];
else
{
//DSP
if (addr < 0x780) //COEF
v= *((u16 *) (m_DSP.COEF + (addr - 0x700) / 2));
else if (addr < 0x7c0)
v= *((u16 *) (m_DSP.MADRS + (addr - 0x780) / 2));
else if (addr < 0x800)
v= *((u16 *) (m_DSP.MADRS + (addr - 0x7c0) / 2));
else if (addr < 0xC00)
v= *((u16 *) (m_DSP.MPRO + (addr - 0x800) / 2));
else if (addr < 0xE00)
{
if (addr & 2)
v = m_DSP.TEMP[(addr >> 2) & 0x7f] & 0xffff;
else
v = m_DSP.TEMP[(addr >> 2) & 0x7f] >> 16;
}
else if (addr < 0xE80)
{
if (addr & 2)
v = m_DSP.MEMS[(addr >> 2) & 0x1f] & 0xffff;
else
v = m_DSP.MEMS[(addr >> 2) & 0x1f] >> 16;
}
else if (addr < 0xEC0)
{
if (addr & 2)
v = m_DSP.MIXS[(addr >> 2) & 0xf] & 0xffff;
else
v = m_DSP.MIXS[(addr >> 2) & 0xf] >> 16;
}
else if (addr < 0xEE0)
v = *((u16 *) (m_DSP.EFREG + (addr - 0xec0) / 2));
else
{
/**!
@todo Kyuutenkai reads from 0xee0/0xee2, it's tied with EXTS register(s) also used for CD-Rom Player equalizer.
This port is actually an external parallel port, directly connected from the CD Block device, hence code is a bit of an hack.
Kyuutenkai code snippet for reference:
004A3A: 207C 0010 0EE0 movea.l #$100ee0, A0
004A40: 43EA 0090 lea ($90,A2), A1 ;A2=0x700
004A44: 6100 0254 bsr $4c9a
004A48: 207C 0010 0EE2 movea.l #$100ee2, A0
004A4E: 43EA 0092 lea ($92,A2), A1
004A52: 6100 0246 bsr $4c9a
004A56: 207C 0010 0ED2 movea.l #$100ed2, A0
004A5C: 43EA 0094 lea ($94,A2), A1
004A60: 6100 0238 bsr $4c9a
004A64: 3540 0096 move.w D0, ($96,A2)
004A68: 207C 0010 0ED4 movea.l #$100ed4, A0
004A6E: 43EA 0098 lea ($98,A2), A1
004A72: 6100 0226 bsr $4c9a
004A76: 3540 009A move.w D0, ($9a,A2)
004A7A: 207C 0010 0ED6 movea.l #$100ed6, A0
004A80: 43EA 009C lea ($9c,A2), A1
004A84: 6100 0214 bsr $4c9a
004A88: 3540 009E move.w D0, ($9e,A2)
004A8C: 4E75 rts
004C9A: 48E7 4000 movem.l D1, -(A7)
004C9E: 3010 move.w (A0), D0 ;reads from 0x100ee0/ee2
004CA0: 4A40 tst.w D0
004CA2: 6A00 0004 bpl $4ca8
004CA6: 4440 neg.w D0
004CA8: 3211 move.w (A1), D1
004CAA: D041 add.w D1, D0
004CAC: E248 lsr.w #1, D0
004CAE: 3280 move.w D0, (A1) ;writes to RAM buffer 0x790/0x792
004CB0: 4CDF 0002 movem.l (A7)+, D1
004CB4: 4E75 rts
*/
logerror("SCSP: Reading from EXTS register %08x\n", addr);
if (addr < 0xEE4)
v = *((u16 *) (m_DSP.EXTS + (addr - 0xee0) / 2));
}
}
return v;
}
inline s32 scsp_device::UpdateSlot(SCSP_SLOT *slot)
{
if (SSCTL(slot) == 3) // manual says cannot be used
{
logerror("SCSP: Invaild SSCTL setting at slot %02x\n", slot->slot);
return 0;
}
s32 sample = 0; // NB: Shouldn't be necessary, but GCC 8.2.1 claims otherwise.
int step = slot->step;
u32 addr1, addr2, addr_select; // current and next sample addresses
u32 *addr[2] = {&addr1, &addr2}; // used for linear interpolation
u32 *slot_addr[2] = {&(slot->cur_addr), &(slot->nxt_addr)}; //
if (PLFOS(slot) != 0)
{
step = step * PLFO_Step(&(slot->PLFO));
step >>= SHIFT;
}
if (PCM8B(slot))
{
addr1 = slot->cur_addr >> SHIFT;
addr2 = slot->nxt_addr >> SHIFT;
}
else
{
addr1 = (slot->cur_addr >> (SHIFT - 1)) & ~1;
addr2 = (slot->nxt_addr >> (SHIFT - 1)) & ~1;
}
if (MDL(slot) != 0 || MDXSL(slot) != 0 || MDYSL(slot) != 0)
{
s32 smp = (m_RINGBUF[(m_BUFPTR + MDXSL(slot)) & 63] + m_RINGBUF[(m_BUFPTR + MDYSL(slot)) & 63]) / 2;
smp <<= 0xA; // associate cycle with 1024
smp >>= 0x1A - MDL(slot); // ex. for MDL=0xF, sample range corresponds to +/- 64 pi (32=2^5 cycles) so shift by 11 (16-5 == 0x1A-0xF)
if (!PCM8B(slot)) smp <<= 1;
addr1 += smp; addr2 += smp;
}
if (SSCTL(slot) == 0) // External DRAM data
{
if (PCM8B(slot)) //8 bit signed
{
int8_t p1 = read_byte(SA(slot) + addr1);
int8_t p2 = read_byte(SA(slot) + addr2);
s32 s;
s32 fpart=slot->cur_addr & ((1 << SHIFT) - 1);
s = (int) (p1 << 8) * ((1 << SHIFT) - fpart) + (int) (p2 << 8) * fpart;
sample = (s >> SHIFT);
}
else //16 bit signed (endianness?)
{
s16 p1 = read_word(SA(slot) + addr1);
s16 p2 = read_word(SA(slot) + addr2);
s32 s;
s32 fpart = slot->cur_addr & ((1 << SHIFT) - 1);
s = (int)(p1) * ((1 << SHIFT) - fpart) + (int)(p2) * fpart;
sample = (s >> SHIFT);
}
}
else if (SSCTL(slot) == 1) // Internally generated data (Noise)
sample = (s16)(machine().rand() & 0xffff); // Unknown algorithm
else if (SSCTL(slot) >= 2) // Internally generated data (All 0)
sample = 0;
if (SBCTL(slot) & 0x1)
sample ^= 0x7FFF;
if (SBCTL(slot) & 0x2)
sample = (s16)(sample ^ 0x8000);
if (slot->Backwards)
slot->cur_addr -= step;
else
slot->cur_addr += step;
slot->nxt_addr = slot->cur_addr + (1 << SHIFT);
addr1 = slot->cur_addr >> SHIFT;
addr2 = slot->nxt_addr >> SHIFT;
if (addr1 >= LSA(slot) && !(slot->Backwards))
{
if (LPSLNK(slot) && slot->EG.state == SCSP_ATTACK)
slot->EG.state = SCSP_DECAY1;
}
for (addr_select = 0; addr_select < 2; addr_select++)
{
s32 rem_addr;
switch (LPCTL(slot))
{
case 0: //no loop
if (*addr[addr_select] >= LSA(slot) && *addr[addr_select] >= LEA(slot))
{
//slot->active=0;
StopSlot(slot, 0);
}
break;
case 1: //normal loop
if (*addr[addr_select] >= LEA(slot))
{
rem_addr = *slot_addr[addr_select] - (LEA(slot) << SHIFT);
*slot_addr[addr_select] = (LSA(slot) << SHIFT) + rem_addr;
}
break;
case 2: //reverse loop
if ((*addr[addr_select] >= LSA(slot)) && !(slot->Backwards))
{
rem_addr = *slot_addr[addr_select] - (LSA(slot) << SHIFT);
*slot_addr[addr_select] = (LEA(slot) << SHIFT) - rem_addr;
slot->Backwards = 1;
}
else if ((*addr[addr_select] < LSA(slot) || (*slot_addr[addr_select] & 0x80000000)) && slot->Backwards)
{
rem_addr = (LSA(slot) << SHIFT) - *slot_addr[addr_select];
*slot_addr[addr_select] = (LEA(slot) << SHIFT) - rem_addr;
}
break;
case 3: //ping-pong
if (*addr[addr_select] >= LEA(slot)) //reached end, reverse till start
{
rem_addr = *slot_addr[addr_select] - (LEA(slot) << SHIFT);
*slot_addr[addr_select] = (LEA(slot) << SHIFT) - rem_addr;
slot->Backwards = 1;
}
else if ((*addr[addr_select] < LSA(slot) || (*slot_addr[addr_select] & 0x80000000)) && slot->Backwards)//reached start or negative
{
rem_addr = (LSA(slot) << SHIFT) - *slot_addr[addr_select];
*slot_addr[addr_select] = (LSA(slot) << SHIFT) + rem_addr;
slot->Backwards = 0;
}
break;
}
}
if (!SDIR(slot))
{
if (ALFOS(slot) != 0)
{
sample = sample * ALFO_Step(&(slot->ALFO));
sample >>= SHIFT;
}
if (slot->EG.state == SCSP_ATTACK)
sample = (sample * EG_Update(slot)) >> SHIFT;
else
sample = (sample * m_EG_TABLE[EG_Update(slot) >> (SHIFT - 10)]) >> SHIFT;
}
if (!STWINH(slot))
{
if (!SDIR(slot))
{
u16 Enc = ((TL(slot)) << 0x0) | (0x7 << 0xd);
*m_RBUFDST = (sample * m_LPANTABLE[Enc]) >> (SHIFT + 1);
}
else
{
u16 Enc = (0 << 0x0) | (0x7 << 0xd);
*m_RBUFDST = (sample * m_LPANTABLE[Enc]) >> (SHIFT + 1);
}
}
return sample;
}
void scsp_device::DoMasterSamples(int nsamples)
{
stream_sample_t *bufr,*bufl;
stream_sample_t *exts[2];
bufr = m_bufferr;
bufl = m_bufferl;
exts[0] = m_exts0;
exts[1] = m_exts1;
for (int s = 0; s < nsamples; ++s)
{
s32 smpl = 0, smpr = 0;
for (int sl = 0; sl < 32; ++sl)
{
#if SCSP_FM_DELAY
m_RBUFDST = m_DELAYBUF + m_DELAYPTR;
#else
m_RBUFDST = m_RINGBUF + m_BUFPTR;
#endif
if (m_Slots[sl].active)
{
SCSP_SLOT *slot = m_Slots + sl;
u16 Enc;
s32 sample = UpdateSlot(slot);
Enc = ((TL(slot)) << 0x0) | ((IMXL(slot)) << 0xd);
m_DSP.SetSample((sample*m_LPANTABLE[Enc]) >> (SHIFT-2), ISEL(slot), IMXL(slot));
Enc = ((TL(slot)) << 0x0) | ((DIPAN(slot)) << 0x8) | ((DISDL(slot)) << 0xd);
{
smpl += (sample * m_LPANTABLE[Enc]) >> SHIFT;
smpr += (sample * m_RPANTABLE[Enc]) >> SHIFT;
}
}
#if SCSP_FM_DELAY
m_RINGBUF[(m_BUFPTR + 64 - (SCSP_FM_DELAY - 1)) & 63] = m_DELAYBUF[(m_DELAYPTR + SCSP_FM_DELAY - (SCSP_FM_DELAY - 1)) % SCSP_FM_DELAY];
#endif
++m_BUFPTR;
m_BUFPTR &= 63;
#if SCSP_FM_DELAY
++m_DELAYPTR;
if (m_DELAYPTR > SCSP_FM_DELAY-1) m_DELAYPTR = 0;
#endif
}
m_DSP.Step();
for (int i = 0; i < 16; ++i)
{
SCSP_SLOT *slot = m_Slots + i;
if (EFSDL(slot))
{
u16 Enc = ((EFPAN(slot)) << 0x8) | ((EFSDL(slot)) << 0xd);
smpl += (m_DSP.EFREG[i] * m_LPANTABLE[Enc]) >> SHIFT;
smpr += (m_DSP.EFREG[i] * m_RPANTABLE[Enc]) >> SHIFT;
}
}
for (int i = 0; i < 2; ++i)
{
SCSP_SLOT *slot = m_Slots + i + 16; // 100217, 100237 EFSDL, EFPAN for EXTS0/1
if (EFSDL(slot))
{
m_DSP.EXTS[i] = exts[i][s];
u16 Enc = ((EFPAN(slot)) << 0x8) | ((EFSDL(slot)) << 0xd);
smpl += (m_DSP.EXTS[i] * m_LPANTABLE[Enc]) >> SHIFT;
smpr += (m_DSP.EXTS[i] * m_RPANTABLE[Enc]) >> SHIFT;
}
}
if (DAC18B())
{
smpl = clip18(smpl);
smpr = clip18(smpr);
}
else
{
smpl = clip16(smpl >> 2);
smpr = clip16(smpr >> 2);
}
*bufl++ = smpl;
*bufr++ = smpr;
}
}
/* TODO: this needs to be timer-ized */
void scsp_device::exec_dma()
{
static u16 tmp_dma[3];
int i;
logerror("SCSP: DMA transfer START\n"
"DMEA: %04x DRGA: %04x DTLG: %04x\n"
"DGATE: %d DDIR: %d\n", m_dma.dmea, m_dma.drga, m_dma.dtlg, m_dma.dgate ? 1 : 0, m_dma.ddir ? 1 : 0);
/* Copy the dma values in a temp storage for resuming later */
/* (DMA *can't* overwrite its parameters). */
if (!(m_dma.ddir))
{
for (i = 0; i < 3; i++)
tmp_dma[i] = m_udata.data[(0x12 + (i * 2)) / 2];
}
/* note: we don't use space.read_word / write_word because it can happen that SH-2 enables the DMA instead of m68k. */
/* TODO: don't know if params auto-updates, I guess not ... */
if (m_dma.ddir)
{
if (m_dma.dgate)
{
popmessage("Check: SCSP DMA DGATE enabled, contact MAME/MESSdev");
for (i = 0; i < m_dma.dtlg; i += 2)
{
this->space().write_word(m_dma.dmea, 0);
m_dma.dmea += 2;
}
}
else
{
for (i = 0; i < m_dma.dtlg; i += 2)
{
u16 tmp;
tmp = r16(m_dma.drga);
this->space().write_word(m_dma.dmea, tmp);
m_dma.dmea += 2;
m_dma.drga += 2;
}
}
}
else
{
if (m_dma.dgate)
{
popmessage("Check: SCSP DMA DGATE enabled, contact MAME/MESSdev");
for (i = 0; i < m_dma.dtlg; i += 2)
{
w16(m_dma.drga, 0);
m_dma.drga += 2;
}
}
else
{
for (i = 0; i < m_dma.dtlg; i += 2)
{
u16 tmp = read_word(m_dma.dmea);
w16(m_dma.drga, tmp);
m_dma.dmea += 2;
m_dma.drga += 2;
}
}
}
/*Resume the values*/
if (!(m_dma.ddir))
{
for (i = 0; i < 3; i++)
m_udata.data[(0x12 + (i * 2)) / 2] = tmp_dma[i];
}
/* Job done */
m_udata.data[0x16/2] &= ~0x1000;
/* request a dma end irq (TODO: make it inside the interface) */
if (m_udata.data[0x1e/2] & 0x10)
{
popmessage("SCSP DMA IRQ triggered, contact MAMEdev");
m_irq_cb(DecodeSCI(SCIDMA), HOLD_LINE);
}
}
#ifdef UNUSED_FUNCTION
int IRQCB(void *param)
{
CheckPendingIRQ(param);
return -1;
}
#endif
READ16_MEMBER(scsp_device::read)
{
m_stream->update();
return r16(offset * 2);
}
WRITE16_MEMBER(scsp_device::write)
{
m_stream->update();
u16 tmp = r16(offset * 2);
COMBINE_DATA(&tmp);
w16(offset * 2, tmp);
}
void scsp_device::midi_in(u8 data)
{
// printf("scsp_midi_in: %02x\n", data);
m_MidiStack[m_MidiW++] = data;
m_MidiW &= 31;
CheckPendingIRQ();
}
READ16_MEMBER(scsp_device::midi_out_r)
{
u8 val;
val = m_MidiStack[m_MidiR++];
m_MidiR &= 31;
return val;
}
//LFO handling
#define LFIX(v) ((u32) ((float) (1 << LFO_SHIFT) * (v)))
//Convert DB to multiply amplitude
#define DB(v) LFIX(powf(10.0f, v / 20.0f))
//Convert cents to step increment
#define CENTS(v) LFIX(powf(2.0f, v / 1200.0f))
static const float LFOFreq[32] =
{
0.17f,0.19f,0.23f,0.27f,0.34f,0.39f,0.45f,0.55f,0.68f,0.78f,0.92f,1.10f,1.39f,1.60f,1.87f,2.27f,
2.87f,3.31f,3.92f,4.79f,6.15f,7.18f,8.60f,10.8f,14.4f,17.2f,21.5f,28.7f,43.1f,57.4f,86.1f,172.3f
};
static const float ASCALE[8] = {0.0f,0.4f,0.8f,1.5f,3.0f,6.0f,12.0f,24.0f};
static const float PSCALE[8] = {0.0f,7.0f,13.5f,27.0f,55.0f,112.0f,230.0f,494.0f};
void scsp_device::LFO_Init()
{
for (int i = 0; i < 256; ++i)
{
int a,p;
// float TL;
//Saw
a = 255-i;
if (i < 128)
p = i;
else
p = i - 256;
m_ALFO_SAW[i] = a;
m_PLFO_SAW[i] = p;
//Square
if (i < 128)
{
a = 255;
p = 127;
}
else
{
a = 0;
p = -128;
}
m_ALFO_SQR[i] = a;
m_PLFO_SQR[i] = p;
//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;
m_ALFO_TRI[i] = a;
m_PLFO_TRI[i] = p;
//noise
//a=lfo_noise[i];
a = machine().rand() & 0xff;
p = 128 - a;
m_ALFO_NOI[i] = a;
m_PLFO_NOI[i] = p;
}
for (int s = 0; s < 8; ++s)
{
float limit = PSCALE[s];
for (int i = -128; i < 128; ++i)
{
m_PSCALES[s][i+128] = CENTS(((limit * (float) i) / 128.0f));
}
limit = -ASCALE[s];
for (int i = 0; i < 256; ++i)
{
m_ASCALES[s][i] = DB(((limit * (float) i) / 256.0f));
}
}
}
s32 scsp_device::PLFO_Step(SCSP_LFO_t *LFO)
{
int p;
LFO->phase += LFO->phase_step;
#if LFO_SHIFT!=8
LFO->phase &= (1 << (LFO_SHIFT + 8)) - 1;
#endif
p=LFO->table[LFO->phase >> LFO_SHIFT];
p=LFO->scale[p+128];
return p << (SHIFT - LFO_SHIFT);
}
s32 scsp_device::ALFO_Step(SCSP_LFO_t *LFO)
{
int p;
LFO->phase += LFO->phase_step;
#if LFO_SHIFT!=8
LFO->phase &= (1 << (LFO_SHIFT + 8)) - 1;
#endif
p=LFO->table[LFO->phase >> LFO_SHIFT];
p=LFO->scale[p];
return p << (SHIFT - LFO_SHIFT);
}
void scsp_device::LFO_ComputeStep(SCSP_LFO_t *LFO,u32 LFOF,u32 LFOWS,u32 LFOS,int ALFO)
{
float step = (float) LFOFreq[LFOF] * 256.0f / 44100.0f;
LFO->phase_step = (u32) ((float) (1 << LFO_SHIFT) * step);
if (ALFO)
{
switch (LFOWS)
{
case 0: LFO->table = m_ALFO_SAW; break;
case 1: LFO->table = m_ALFO_SQR; break;
case 2: LFO->table = m_ALFO_TRI; break;
case 3: LFO->table = m_ALFO_NOI; break;
}
LFO->scale = m_ASCALES[LFOS];
}
else
{
switch (LFOWS)
{
case 0: LFO->table = m_PLFO_SAW; break;
case 1: LFO->table = m_PLFO_SQR; break;
case 2: LFO->table = m_PLFO_TRI; break;
case 3: LFO->table = m_PLFO_NOI; break;
}
LFO->scale = m_PSCALES[LFOS];
}
}