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Nuked OPN2: requested changes

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This commit is contained in:
nukeykt 2017-09-23 20:26:26 +09:00
parent 0128f345b5
commit 1c6fa9fdb6
6 changed files with 262 additions and 265 deletions
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2
core/shared.h
View File

@ -25,7 +25,9 @@
#include "psg.h"
#include "ym2413.h"
#include "ym2612.h"
#ifdef HAVE_YM3438_CORE
#include "ym3438.h"
#endif
#include "sram.h"
#include "ggenie.h"
#include "areplay.h"

22
core/sound/sound.c
View File

@ -56,11 +56,11 @@ static void (*YM_Update)(int *buffer, int length);
static void (*YM_Write)(unsigned int a, unsigned int v);
static unsigned int (*YM_Read)(unsigned int a);
#ifdef HAVE_YM3438_CORE
static ym3438_t ym3438;
static int ym3438_accm[24][2];
static int ym3438_sample[2];
static unsigned int ym3438_cycles;
static int ym2612_core;
void YM3438_Reset(void)
{
@ -96,8 +96,9 @@ void YM3438_Write(unsigned int a, unsigned int v)
unsigned int YM3438_Read(unsigned int a)
{
OPN2_Read(&ym3438, a);
return OPN2_Read(&ym3438, a);
}
#endif
/* Run FM chip until required M-cycles */
INLINE void fm_update(unsigned int cycles)
@ -124,10 +125,10 @@ void sound_init( void )
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
/* YM2612 */
ym2612_core = config.ym2612;
if (config.ym2612)
#ifdef HAVE_YM3438_CORE
if (config.ym3438)
{
// Nuked OPN2
/* Nuked OPN2 */
memset(&ym3438, 0, sizeof(ym3438));
memset(&ym3438_sample, 0, sizeof(ym3438_sample));
memset(&ym3438_accm, 0, sizeof(ym3438_accm));
@ -140,8 +141,9 @@ void sound_init( void )
fm_cycles_ratio = 6 * 7;
}
else
#endif
{
// MAME
/* MAME */
YM2612Init();
YM2612Config(config.dac_bits);
YM_Reset = YM2612ResetChip;
@ -269,7 +271,8 @@ int sound_context_save(uint8 *state)
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
if (ym2612_core)
#ifdef HAVE_YM3438_CORE
if (config.ym3438)
{
save_param(&ym3438, sizeof(ym3438));
save_param(&ym3438_accm, sizeof(ym3438_accm));
@ -277,6 +280,7 @@ int sound_context_save(uint8 *state)
save_param(&ym3438_cycles, sizeof(ym3438_cycles));
}
else
#endif
{
bufferptr = YM2612SaveContext(state);
}
@ -299,7 +303,8 @@ int sound_context_load(uint8 *state)
if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
{
if (ym2612_core)
#ifdef HAVE_YM3438_CORE
if (config.ym3438)
{
load_param(&ym3438, sizeof(ym3438));
load_param(&ym3438_accm, sizeof(ym3438_accm));
@ -307,6 +312,7 @@ int sound_context_load(uint8 *state)
load_param(&ym3438_cycles, sizeof(ym3438_cycles));
}
else
#endif
{
bufferptr = YM2612LoadContext(state);
YM2612Config(config.dac_bits);

381
core/sound/ym3438.c
View File

@ -1,46 +1,46 @@
//
// Copyright (C) 2017 Alexey Khokholov (Nuke.YKT)
//
// Redistribution and use of this code or any derivative works are permitted
// provided that the following conditions are met:
//
// - Redistributions may not be sold, nor may they be used in a commercial
// product or activity.
//
// - Redistributions that are modified from the original source must include the
// complete source code, including the source code for all components used by a
// binary built from the modified sources. However, as a special exception, the
// source code distributed need not include anything that is normally distributed
// (in either source or binary form) with the major components (compiler, kernel,
// and so on) of the operating system on which the executable runs, unless that
// component itself accompanies the executable.
//
// - Redistributions must reproduce the above copyright notice, this list of
// conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//
// Nuked OPN2(Yamaha YM3438) emulator.
// Thanks:
// Silicon Pr0n:
// Yamaha YM3438 decap and die shot(digshadow).
// OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
// OPL2 ROMs.
//
// version: 1.0.2
//
/*
* Copyright (C) 2017 Alexey Khokholov (Nuke.YKT)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* Nuked OPN2(Yamaha YM3438) emulator.
* Thanks:
* Silicon Pr0n:
* Yamaha YM3438 decap and die shot(digshadow).
* OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
* OPL2 ROMs.
*
* version: 1.0.2
*/
#include "ym3438.h"
@ -51,10 +51,7 @@ enum {
eg_num_release = 3
};
//
// logsin table
//
/* logsin table */
static const Bit16u logsinrom[256] = {
0x859, 0x6c3, 0x607, 0x58b, 0x52e, 0x4e4, 0x4a6, 0x471,
0x443, 0x41a, 0x3f5, 0x3d3, 0x3b5, 0x398, 0x37e, 0x365,
@ -90,10 +87,7 @@ static const Bit16u logsinrom[256] = {
0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000, 0x000
};
//
// exp table
//
/* exp table */
static const Bit16u exprom[256] = {
0x000, 0x003, 0x006, 0x008, 0x00b, 0x00e, 0x011, 0x014,
0x016, 0x019, 0x01c, 0x01f, 0x022, 0x025, 0x028, 0x02a,
@ -129,16 +123,12 @@ static const Bit16u exprom[256] = {
0x3d4, 0x3da, 0x3df, 0x3e4, 0x3ea, 0x3ef, 0x3f5, 0x3fa
};
//
// Note table
//
/* Note table */
static const Bit32u fn_note[16] = {
0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 3, 3, 3
};
//
// Envelope generator
//
/* Envelope generator */
static const Bit32u eg_stephi[4][4] = {
{ 0, 0, 0, 0 },
{ 1, 0, 0, 0 },
@ -150,9 +140,7 @@ static const Bit8u eg_am_shift[4] = {
7, 3, 1, 0
};
//
// Phase generator
//
/* Phase generator */
static const Bit32u pg_detune[8] = { 16, 17, 19, 20, 22, 24, 27, 29 };
static const Bit32u pg_lfo_sh1[8][8] = {
@ -177,88 +165,80 @@ static const Bit32u pg_lfo_sh2[8][8] = {
{ 7, 7, 7, 2, 7, 7, 2, 1 }
};
//
// Address decoder
//
/* Address decoder */
static const Bit32u op_offset[12] = {
0x000, // Ch1 OP1/OP2
0x001, // Ch2 OP1/OP2
0x002, // Ch3 OP1/OP2
0x100, // Ch4 OP1/OP2
0x101, // Ch5 OP1/OP2
0x102, // Ch6 OP1/OP2
0x004, // Ch1 OP3/OP4
0x005, // Ch2 OP3/OP4
0x006, // Ch3 OP3/OP4
0x104, // Ch4 OP3/OP4
0x105, // Ch5 OP3/OP4
0x106 // Ch6 OP3/OP4
0x000, /* Ch1 OP1/OP2 */
0x001, /* Ch2 OP1/OP2 */
0x002, /* Ch3 OP1/OP2 */
0x100, /* Ch4 OP1/OP2 */
0x101, /* Ch5 OP1/OP2 */
0x102, /* Ch6 OP1/OP2 */
0x004, /* Ch1 OP3/OP4 */
0x005, /* Ch2 OP3/OP4 */
0x006, /* Ch3 OP3/OP4 */
0x104, /* Ch4 OP3/OP4 */
0x105, /* Ch5 OP3/OP4 */
0x106 /* Ch6 OP3/OP4 */
};
static const Bit32u ch_offset[6] = {
0x000, // Ch1
0x001, // Ch2
0x002, // Ch3
0x100, // Ch4
0x101, // Ch5
0x102 // Ch6
0x000, /* Ch1 */
0x001, /* Ch2 */
0x002, /* Ch3 */
0x100, /* Ch4 */
0x101, /* Ch5 */
0x102 /* Ch6 */
};
//
// LFO
//
/* LFO */
static const Bit32u lfo_cycles[8] = {
108, 77, 71, 67, 62, 44, 8, 5
};
//
// FM algorithm
//
/* FM algorithm */
static const Bit32u fm_algorithm[4][6][8] = {
{
{ 1, 1, 1, 1, 1, 1, 1, 1 }, // OP1_0
{ 1, 1, 1, 1, 1, 1, 1, 1 }, // OP1_1
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // OP2
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // Last operator
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // Last operator
{ 0, 0, 0, 0, 0, 0, 0, 1 } // Out
{ 1, 1, 1, 1, 1, 1, 1, 1 }, /* OP1_0 */
{ 1, 1, 1, 1, 1, 1, 1, 1 }, /* OP1_1 */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* OP2 */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* Last operator */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* Last operator */
{ 0, 0, 0, 0, 0, 0, 0, 1 } /* Out */
},
{
{ 0, 1, 0, 0, 0, 1, 0, 0 }, // OP1_0
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // OP1_1
{ 1, 1, 1, 0, 0, 0, 0, 0 }, // OP2
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // Last operator
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // Last operator
{ 0, 0, 0, 0, 0, 1, 1, 1 } // Out
{ 0, 1, 0, 0, 0, 1, 0, 0 }, /* OP1_0 */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* OP1_1 */
{ 1, 1, 1, 0, 0, 0, 0, 0 }, /* OP2 */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* Last operator */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* Last operator */
{ 0, 0, 0, 0, 0, 1, 1, 1 } /* Out */
},
{
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // OP1_0
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // OP1_1
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // OP2
{ 1, 0, 0, 1, 1, 1, 1, 0 }, // Last operator
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // Last operator
{ 0, 0, 0, 0, 1, 1, 1, 1 } // Out
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* OP1_0 */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* OP1_1 */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* OP2 */
{ 1, 0, 0, 1, 1, 1, 1, 0 }, /* Last operator */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* Last operator */
{ 0, 0, 0, 0, 1, 1, 1, 1 } /* Out */
},
{
{ 0, 0, 1, 0, 0, 1, 0, 0 }, // OP1_0
{ 0, 0, 0, 0, 0, 0, 0, 0 }, // OP1_1
{ 0, 0, 0, 1, 0, 0, 0, 0 }, // OP2
{ 1, 1, 0, 1, 1, 0, 0, 0 }, // Last operator
{ 0, 0, 1, 0, 0, 0, 0, 0 }, // Last operator
{ 1, 1, 1, 1, 1, 1, 1, 1 } // Out
{ 0, 0, 1, 0, 0, 1, 0, 0 }, /* OP1_0 */
{ 0, 0, 0, 0, 0, 0, 0, 0 }, /* OP1_1 */
{ 0, 0, 0, 1, 0, 0, 0, 0 }, /* OP2 */
{ 1, 1, 0, 1, 1, 0, 0, 0 }, /* Last operator */
{ 0, 0, 1, 0, 0, 0, 0, 0 }, /* Last operator */
{ 1, 1, 1, 1, 1, 1, 1, 1 } /* Out */
}
};
void OPN2_DoIO(ym3438_t *chip)
{
// Write signal check
/* Write signal check */
chip->write_a_en = (chip->write_a & 0x03) == 0x01;
chip->write_d_en = (chip->write_d & 0x03) == 0x01;
chip->write_a <<= 1;
chip->write_d <<= 1;
// Busy counter
/* Busy counter */
chip->busy = chip->write_busy;
chip->write_busy_cnt += chip->write_busy;
chip->write_busy = (chip->write_busy && !(chip->write_busy_cnt >> 5)) || chip->write_d_en;
@ -271,21 +251,21 @@ void OPN2_DoRegWrite(ym3438_t *chip)
Bit32u slot = chip->slot % 12;
Bit32u address;
Bit32u channel = chip->channel;
// Update registers
/* Update registers */
if (chip->write_fm_data)
{
// Slot
/* Slot */
if (op_offset[slot] == (chip->address & 0x107))
{
if (chip->address & 0x08)
{
// OP2, OP4
/* OP2, OP4 */
slot += 12;
}
address = chip->address & 0xf0;
switch (address)
{
case 0x30: // DT, MULTI
case 0x30: /* DT, MULTI */
chip->multi[slot] = chip->data & 0x0f;
if (!chip->multi[slot])
{
@ -297,26 +277,26 @@ void OPN2_DoRegWrite(ym3438_t *chip)
}
chip->dt[slot] = (chip->data >> 4) & 0x07;
break;
case 0x40: // TL
case 0x40: /* TL */
chip->tl[slot] = chip->data & 0x7f;
break;
case 0x50: // KS, AR
case 0x50: /* KS, AR */
chip->ar[slot] = chip->data & 0x1f;
chip->ks[slot] = (chip->data >> 6) & 0x03;
break;
case 0x60: // AM, DR
case 0x60: /* AM, DR */
chip->dr[slot] = chip->data & 0x1f;
chip->am[slot] = (chip->data >> 7) & 0x01;
break;
case 0x70: // SR
case 0x70: /* SR */
chip->sr[slot] = chip->data & 0x1f;
break;
case 0x80: // SL, RR
case 0x80: /* SL, RR */
chip->rr[slot] = chip->data & 0x0f;
chip->sl[slot] = (chip->data >> 4) & 0x0f;
chip->sl[slot] |= (chip->sl[slot] + 1) & 0x10;
break;
case 0x90: // SSG-EG
case 0x90: /* SSG-EG */
chip->ssg_eg[slot] = chip->data & 0x0f;
break;
default:
@ -324,7 +304,7 @@ void OPN2_DoRegWrite(ym3438_t *chip)
}
}
// Channel
/* Channel */
if (ch_offset[channel] == (chip->address & 0x103))
{
address = chip->address & 0xfc;
@ -364,7 +344,7 @@ void OPN2_DoRegWrite(ym3438_t *chip)
if (chip->write_a_en || chip->write_d_en)
{
// Data
/* Data */
if (chip->write_a_en)
{
chip->write_fm_data = 0;
@ -375,35 +355,35 @@ void OPN2_DoRegWrite(ym3438_t *chip)
chip->write_fm_data = 1;
}
// Address
/* Address */
if (chip->write_a_en)
{
if ((chip->write_data & 0xf0) != 0x00)
{
// FM Write
/* FM Write */
chip->address = chip->write_data;
chip->write_fm_address = 1;
}
else
{
// SSG write
/* SSG write */
chip->write_fm_address = 0;
}
}
// FM Mode
// Data
/* FM Mode */
/* Data */
if (chip->write_d_en && (chip->write_data & 0x100) == 0)
{
switch (chip->address)
{
case 0x21: // LSI test 1
case 0x21: /* LSI test 1 */
for (i = 0; i < 8; i++)
{
chip->mode_test_21[i] = (chip->write_data >> i) & 0x01;
}
break;
case 0x22: // LFO control
case 0x22: /* LFO control */
if ((chip->write_data >> 3) & 0x01)
{
chip->lfo_en = 0x7f;
@ -414,7 +394,7 @@ void OPN2_DoRegWrite(ym3438_t *chip)
}
chip->lfo_freq = chip->write_data & 0x07;
break;
case 0x24: // Timer A
case 0x24: /* Timer A */
chip->timer_a_reg &= 0x03;
chip->timer_a_reg |= (chip->write_data & 0xff) << 2;
break;
@ -422,10 +402,10 @@ void OPN2_DoRegWrite(ym3438_t *chip)
chip->timer_a_reg &= 0x3fc;
chip->timer_a_reg |= chip->write_data & 0x03;
break;
case 0x26: // Timer B
case 0x26: /* Timer B */
chip->timer_b_reg = chip->write_data & 0xff;
break;
case 0x27: // CSM, Timer control
case 0x27: /* CSM, Timer control */
chip->mode_ch3 = (chip->write_data & 0xc0) >> 6;
chip->mode_csm = chip->mode_ch3 == 2;
chip->timer_a_load = chip->write_data & 0x01;
@ -435,14 +415,14 @@ void OPN2_DoRegWrite(ym3438_t *chip)
chip->timer_b_enable = (chip->write_data >> 3) & 0x01;
chip->timer_b_reset = (chip->write_data >> 5) & 0x01;
break;
case 0x28: // Key on/off
case 0x28: /* Key on/off */
for (i = 0; i < 4; i++)
{
chip->mode_kon_operator[i] = (chip->write_data >> (4 + i)) & 0x01;
}
if ((chip->write_data & 0x03) == 0x03)
{
// Invalid address
/* Invalid address */
chip->mode_kon_channel = 0xff;
}
else
@ -450,14 +430,14 @@ void OPN2_DoRegWrite(ym3438_t *chip)
chip->mode_kon_channel = (chip->write_data & 0x03) + ((chip->write_data >> 2) & 1) * 3;
}
break;
case 0x2a: // DAC data
case 0x2a: /* DAC data */
chip->dacdata &= 0x01;
chip->dacdata |= chip->write_data << 1;
break;
case 0x2b: // DAC enable
case 0x2b: /* DAC enable */
chip->dacen = chip->write_data >> 7;
break;
case 0x2c: // LSI test 2
case 0x2c: /* LSI test 2 */
for (i = 0; i < 8; i++)
{
chip->mode_test_2c[i] = (chip->write_data >> i) & 0x01;
@ -471,7 +451,7 @@ void OPN2_DoRegWrite(ym3438_t *chip)
}
}
// Address
/* Address */
if (chip->write_a_en)
{
chip->write_fm_mode_a = chip->write_data & 0xff;
@ -501,7 +481,7 @@ void OPN2_PhaseCalcIncrement(ym3438_t *chip)
Bit8u kcode = chip->pg_kcode;
fnum <<= 1;
// Apply LFO
/* Apply LFO */
if (lfo_l & 0x08)
{
lfo_l ^= 0x0f;
@ -524,7 +504,7 @@ void OPN2_PhaseCalcIncrement(ym3438_t *chip)
basefreq = (fnum << chip->pg_block) >> 2;
// Apply detune
/* Apply detune */
if (dt & 0x03)
{
if (kcode > 0x1c)
@ -554,13 +534,13 @@ void OPN2_PhaseCalcIncrement(ym3438_t *chip)
void OPN2_PhaseGenerate(ym3438_t *chip)
{
Bit32u slot;
// Mask increment
/* Mask increment */
slot = (chip->slot + 20) % 24;
if (chip->pg_reset[slot])
{
chip->pg_inc[slot] = 0;
}
// Phase step
/* Phase step */
slot = (chip->slot + 19) % 24;
chip->pg_phase[slot] += chip->pg_inc[slot];
chip->pg_phase[slot] &= 0xfffff;
@ -583,17 +563,17 @@ void OPN2_EnvelopeSSGEG(ym3438_t *chip)
direction = chip->eg_ssg_dir[slot];
if (chip->eg_level[slot] & 0x200)
{
// Reset
/* Reset */
if ((chip->ssg_eg[slot] & 0x03) == 0x00)
{
chip->eg_ssg_pgrst_latch[slot] = 1;
}
// Repeat
/* Repeat */
if ((chip->ssg_eg[slot] & 0x01) == 0x00)
{
chip->eg_ssg_repeat_latch[slot] = 1;
}
// Inverse
/* Inverse */
if ((chip->ssg_eg[slot] & 0x03) == 0x02)
{
direction ^= 1;
@ -603,7 +583,7 @@ void OPN2_EnvelopeSSGEG(ym3438_t *chip)
direction = 1;
}
}
// Hold up
/* Hold up */
if (chip->eg_kon_latch[slot]
&& ((chip->ssg_eg[slot] & 0x07) == 0x05 || (chip->ssg_eg[slot] & 0x07) == 0x03))
{
@ -634,10 +614,10 @@ void OPN2_EnvelopeADSR(ym3438_t *chip)
chip->eg_read[0] = chip->eg_read_inc;
chip->eg_read_inc = chip->eg_inc > 0;
// Reset phase generator
/* Reset phase generator */
chip->pg_reset[slot] = (nkon && !okon) || chip->eg_ssg_pgrst_latch[slot];
// KeyOn/Off
/* KeyOn/Off */
kon_event = (nkon && !okon) || (okon && chip->eg_ssg_repeat_latch[slot]);
koff_event = okon && !nkon;
@ -645,7 +625,7 @@ void OPN2_EnvelopeADSR(ym3438_t *chip)
if (chip->eg_ssg_inv[slot])
{
// Inverse
/* Inverse */
ssg_level = 512 - level;
ssg_level &= 0x3ff;
}
@ -665,7 +645,7 @@ void OPN2_EnvelopeADSR(ym3438_t *chip)
if (kon_event)
{
nextstate = eg_num_attack;
// Instant attack
/* Instant attack */
if (chip->eg_ratemax)
{
nextlevel = 0;
@ -727,7 +707,7 @@ void OPN2_EnvelopeADSR(ym3438_t *chip)
nextlevel |= chip->eg_tl[1] << 3;
}
// Envelope off
/* Envelope off */
if (!kon_event && !chip->eg_ssg_hold_up_latch[slot] && chip->eg_state[slot] != eg_num_attack && eg_off)
{
nextstate = eg_num_release;
@ -750,7 +730,7 @@ void OPN2_EnvelopePrepare(ym3438_t *chip)
Bit32u slot = chip->slot;
Bit8u rate_sel;
// Prepare increment
/* Prepare increment */
rate = (chip->eg_rate << 1) + chip->eg_ksv;
if (rate > 0x3f)
@ -794,7 +774,7 @@ void OPN2_EnvelopePrepare(ym3438_t *chip)
chip->eg_inc = inc;
chip->eg_ratemax = (rate >> 1) == 0x1f;
// Prepare rate & ksv
/* Prepare rate & ksv */
rate_sel = chip->eg_state[slot];
if ((chip->eg_kon[slot] && chip->eg_ssg_repeat_latch[slot])
|| (!chip->eg_kon[slot] && chip->eg_kon_latch[slot]))
@ -828,7 +808,7 @@ void OPN2_EnvelopePrepare(ym3438_t *chip)
{
chip->eg_am_shift = 0;
}
// Delay TL & SL value
/* Delay TL & SL value */
chip->eg_tl[1] = chip->eg_tl[0];
chip->eg_tl[0] = chip->tl[slot];
chip->eg_sl[1] = chip->eg_sl[0];
@ -844,7 +824,7 @@ void OPN2_EnvelopeGenerate(ym3438_t *chip)
if (chip->eg_ssg_inv[slot])
{
// Inverse
/* Inverse */
level = 512 - level;
}
if (chip->mode_test_21[5])
@ -853,10 +833,10 @@ void OPN2_EnvelopeGenerate(ym3438_t *chip)
}
level &= 0x3ff;
// Apply AM LFO
/* Apply AM LFO */
level += chip->lfo_am >> eg_am_shift[chip->eg_am_shift];
// Apply TL
/* Apply TL */
if (!(chip->mode_csm && chip->channel == 2 + 1))
{
level += chip->eg_tl[0] << 3;
@ -891,7 +871,7 @@ void OPN2_FMPrepare(ym3438_t *chip)
Bit8u connect = chip->connect[channel];
Bit32u prevslot = (chip->slot + 18) % 24;
// Calculate modulation
/* Calculate modulation */
mod1 = mod2 = 0;
if (fm_algorithm[op][0][connect])
@ -917,7 +897,7 @@ void OPN2_FMPrepare(ym3438_t *chip)
mod = mod1 + mod2;
if (op == 0)
{
// Feedback
/* Feedback */
mod = mod >> (10 - chip->fb[channel]);
if (!chip->fb[channel])
{
@ -931,13 +911,13 @@ void OPN2_FMPrepare(ym3438_t *chip)
chip->fm_mod[slot] = mod;
slot = (chip->slot + 18) % 24;
// OP1
/* OP1 */
if (slot / 6 == 0)
{
chip->fm_op1[channel][1] = chip->fm_op1[channel][0];
chip->fm_op1[channel][0] = chip->fm_out[slot];
}
// OP2
/* OP2 */
if (slot / 6 == 2)
{
chip->fm_op2[channel] = chip->fm_out[slot];
@ -962,7 +942,7 @@ void OPN2_ChGenerate(ym3438_t *chip)
add += chip->fm_out[slot] >> 5;
}
sum = acc + add;
// Clamp
/* Clamp */
if (sum > 255)
{
sum = 255;
@ -988,20 +968,20 @@ void OPN2_ChOutput(ym3438_t *chip)
chip->ch_read = chip->ch_lock;
if (chip->slot < 12)
{
// Ch 4,5,6
/* Ch 4,5,6 */
channel++;
}
if ((chip->cycles & 3) == 0)
{
if (!test_dac)
{
// Lock value
/* Lock value */
chip->ch_lock = chip->ch_out[channel];
}
chip->ch_lock_l = chip->pan_l[channel];
chip->ch_lock_r = chip->pan_r[channel];
}
// Ch 6
/* Ch 6 */
if (((chip->cycles >> 2) == 1 && chip->dacen) || test_dac)
{
out = (Bit16s)chip->dacdata ^ 0x100;
@ -1027,7 +1007,7 @@ void OPN2_ChOutput(ym3438_t *chip)
void OPN2_FMGenerate(ym3438_t *chip)
{
Bit32u slot = (chip->slot + 19) % 24;
// Calculate phase
/* Calculate phase */
Bit16u phase = (chip->fm_mod[slot] + (chip->pg_phase[slot] >> 10)) & 0x3ff;
Bit16u quarter;
Bit16u level;
@ -1041,9 +1021,9 @@ void OPN2_FMGenerate(ym3438_t *chip)
quarter = phase & 0xff;
}
level = logsinrom[quarter];
// Apply envelope
/* Apply envelope */
level += chip->eg_out[slot] << 2;
// Transform
/* Transform */
if (level > 0x1fff)
{
level = 0x1fff;
@ -1069,12 +1049,12 @@ void OPN2_DoTimerA(ym3438_t *chip)
load = chip->timer_a_overflow;
if (chip->cycles == 2)
{
// Lock load value
/* Lock load value */
load |= (!chip->timer_a_load_lock && chip->timer_a_load);
chip->timer_a_load_lock = chip->timer_a_load;
if (chip->mode_csm)
{
// CSM KeyOn
/* CSM KeyOn */
chip->mode_kon_csm = load;
}
else
@ -1082,7 +1062,7 @@ void OPN2_DoTimerA(ym3438_t *chip)
chip->mode_kon_csm = 0;
}
}
// Load counter
/* Load counter */
if (chip->timer_a_load_latch)
{
time = chip->timer_a_reg;
@ -1092,12 +1072,12 @@ void OPN2_DoTimerA(ym3438_t *chip)
time = chip->timer_a_cnt;
}
chip->timer_a_load_latch = load;
// Increase counter
/* Increase counter */
if ((chip->cycles == 1 && chip->timer_a_load_lock) || chip->mode_test_21[2])
{
time++;
}
// Set overflow flag
/* Set overflow flag */
if (chip->timer_a_reset)
{
chip->timer_a_reset = 0;
@ -1118,11 +1098,11 @@ void OPN2_DoTimerB(ym3438_t *chip)
load = chip->timer_b_overflow;
if (chip->cycles == 2)
{
// Lock load value
/* Lock load value */
load |= (!chip->timer_b_load_lock && chip->timer_b_load);
chip->timer_b_load_lock = chip->timer_b_load;
}
// Load counter
/* Load counter */
if (chip->timer_b_load_latch)
{
time = chip->timer_b_reg;
@ -1132,7 +1112,7 @@ void OPN2_DoTimerB(ym3438_t *chip)
time = chip->timer_b_cnt;
}
chip->timer_b_load_latch = load;
// Increase counter
/* Increase counter */
if (chip->cycles == 1)
{
chip->timer_b_subcnt++;
@ -1142,7 +1122,7 @@ void OPN2_DoTimerB(ym3438_t *chip)
time++;
}
chip->timer_b_subcnt &= 0x0f;
// Set overflow flag
/* Set overflow flag */
if (chip->timer_b_reset)
{
chip->timer_b_reset = 0;
@ -1158,24 +1138,24 @@ void OPN2_DoTimerB(ym3438_t *chip)
void OPN2_KeyOn(ym3438_t*chip)
{
// Key On
/* Key On */
chip->eg_kon_latch[chip->slot] = chip->mode_kon[chip->slot];
chip->eg_kon_csm[chip->slot] = 0;
if (chip->channel == 2 && chip->mode_kon_csm)
{
// CSM Key On
/* CSM Key On */
chip->eg_kon_latch[chip->slot] = 1;
chip->eg_kon_csm[chip->slot] = 1;
}
if (chip->cycles == chip->mode_kon_channel)
{
// OP1
/* OP1 */
chip->mode_kon[chip->channel] = chip->mode_kon_operator[0];
// OP2
/* OP2 */
chip->mode_kon[chip->channel + 12] = chip->mode_kon_operator[1];
// OP3
/* OP3 */
chip->mode_kon[chip->channel + 6] = chip->mode_kon_operator[2];
// OP4
/* OP4 */
chip->mode_kon[chip->channel + 18] = chip->mode_kon_operator[3];
}
}
@ -1200,12 +1180,11 @@ void OPN2_Reset(ym3438_t *chip)
void OPN2_Clock(ym3438_t *chip, Bit32u *buffer)
{
// Clear status
chip->lfo_inc = chip->mode_test_21[1];
chip->pg_read >>= 1;
chip->eg_read[1] >>= 1;
chip->eg_cycle++;
// Lock envelope generator timer value
/* Lock envelope generator timer value */
if (chip->cycles == 1 && chip->eg_quotient == 2)
{
if (chip->eg_cycle_stop)
@ -1218,7 +1197,7 @@ void OPN2_Clock(ym3438_t *chip, Bit32u *buffer)
}
chip->eg_timer_low_lock = chip->eg_timer & 0x03;
}
// Cycle specific functions
/* Cycle specific functions */
switch (chip->cycles)
{
case 0:
@ -1287,28 +1266,28 @@ void OPN2_Clock(ym3438_t *chip, Bit32u *buffer)
OPN2_EnvelopeSSGEG(chip);
OPN2_EnvelopePrepare(chip);
// Prepare fnum & block
/* Prepare fnum & block */
if (chip->mode_ch3)
{
// Channel 3 special mode
/* Channel 3 special mode */
switch (chip->slot)
{
case 1: // OP1
case 1: /* OP1 */
chip->pg_fnum = chip->fnum_3ch[1];
chip->pg_block = chip->block_3ch[1];
chip->pg_kcode = chip->kcode_3ch[1];
break;
case 7: // OP3
case 7: /* OP3 */
chip->pg_fnum = chip->fnum_3ch[0];
chip->pg_block = chip->block_3ch[0];
chip->pg_kcode = chip->kcode_3ch[0];
break;
case 13: // OP2
case 13: /* OP2 */
chip->pg_fnum = chip->fnum_3ch[2];
chip->pg_block = chip->block_3ch[2];
chip->pg_kcode = chip->kcode_3ch[2];
break;
case 19: // OP4
case 19: /* OP4 */
default:
chip->pg_fnum = chip->fnum[(chip->channel + 1) % 6];
chip->pg_block = chip->block[(chip->channel + 1) % 6];
@ -1339,12 +1318,12 @@ void OPN2_Write(ym3438_t *chip, Bit32u port, Bit8u data)
chip->write_data = ((port << 7) & 0x100) | data;
if (port & 1)
{
// Data
/* Data */
chip->write_d |= 1;
}
else
{
// Address
/* Address */
chip->write_a |= 1;
}
}
@ -1374,7 +1353,7 @@ Bit8u OPN2_Read(ym3438_t *chip, Bit32u port)
{
if (chip->mode_test_21[6])
{
// Read test data
/* Read test data */
Bit16u testdata = ((chip->pg_read & 0x01) << 15)
| ((chip->eg_read[chip->mode_test_21[0]] & 0x01) << 14);
if (chip->mode_test_2c[4])
@ -1401,4 +1380,4 @@ Bit8u OPN2_Read(ym3438_t *chip, Bit32u port)
}
}
return 0;
}
}

102
core/sound/ym3438.h
View File

@ -1,46 +1,46 @@
//
// Copyright (C) 2017 Alexey Khokholov (Nuke.YKT)
//
// Redistribution and use of this code or any derivative works are permitted
// provided that the following conditions are met:
//
// - Redistributions may not be sold, nor may they be used in a commercial
// product or activity.
//
// - Redistributions that are modified from the original source must include the
// complete source code, including the source code for all components used by a
// binary built from the modified sources. However, as a special exception, the
// source code distributed need not include anything that is normally distributed
// (in either source or binary form) with the major components (compiler, kernel,
// and so on) of the operating system on which the executable runs, unless that
// component itself accompanies the executable.
//
// - Redistributions must reproduce the above copyright notice, this list of
// conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//
// Nuked OPN2(Yamaha YM3438) emulator.
// Thanks:
// Silicon Pr0n:
// Yamaha YM3438 decap and die shot(digshadow).
// OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
// OPL2 ROMs.
//
// version: 1.0.2
//
/*
* Copyright (C) 2017 Alexey Khokholov (Nuke.YKT)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* Nuked OPN2(Yamaha YM3438) emulator.
* Thanks:
* Silicon Pr0n:
* Yamaha YM3438 decap and die shot(digshadow).
* OPLx decapsulated(Matthew Gambrell, Olli Niemitalo):
* OPL2 ROMs.
*
* version: 1.0.2
*/
#ifndef YM3438_H
#define YM3438_H
@ -64,7 +64,7 @@ typedef struct
Bit32u slot;
Bit32u channel;
Bit16s mol, mor;
// IO
/* IO */
Bit16u write_data;
Bit8u write_a;
Bit8u write_d;
@ -80,7 +80,7 @@ typedef struct
Bit8u pin_test_in;
Bit8u pin_irq;
Bit8u busy;
// LFO
/* LFO */
Bit8u lfo_en;
Bit8u lfo_freq;
Bit8u lfo_pm;
@ -88,7 +88,7 @@ typedef struct
Bit8u lfo_cnt;
Bit8u lfo_inc;
Bit8u lfo_quotient;
// Phase generator
/* Phase generator */
Bit16u pg_fnum;
Bit8u pg_block;
Bit8u pg_kcode;
@ -96,7 +96,7 @@ typedef struct
Bit32u pg_phase[24];
Bit8u pg_reset[24];
Bit32u pg_read;
// Envelope generator
/* Envelope generator */
Bit8u eg_cycle;
Bit8u eg_cycle_stop;
Bit8u eg_shift;
@ -128,19 +128,19 @@ typedef struct
Bit8u eg_ssg_inv[24];
Bit32u eg_read[2];
Bit8u eg_read_inc;
// FM
/* FM */
Bit16s fm_op1[6][2];
Bit16s fm_op2[6];
Bit16s fm_out[24];
Bit16u fm_mod[24];
// Channel accumulator
/* Channel */
Bit16s ch_acc[6];
Bit16s ch_out[6];
Bit16s ch_lock;
Bit8u ch_lock_l;
Bit8u ch_lock_r;
Bit16s ch_read;
// Timer
/* Timer */
Bit16u timer_a_cnt;
Bit16u timer_a_reg;
Bit8u timer_a_load_lock;
@ -162,7 +162,7 @@ typedef struct
Bit8u timer_b_overflow_flag;
Bit8u timer_b_overflow;
// Register set
/* Register set */
Bit8u mode_test_21[8];
Bit8u mode_test_2c[8];
Bit8u mode_ch3;

14
libretro/libretro.c
View File

@ -1092,14 +1092,16 @@ static void check_variables(void)
YM2612Config(config.dac_bits);
}
var.key = "genesis_plus_gx_ym2612";
#ifdef HAVE_YM3438_CORE
var.key = "genesis_plus_gx_ym3438";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
{
if (!strcmp(var.value, "nuked opn2"))
config.ym2612 = 1;
config.ym3438 = 1;
else
config.ym2612 = 0;
config.ym3438 = 0;
}
#endif
var.key = "genesis_plus_gx_blargg_ntsc_filter";
environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var);
@ -1637,7 +1639,11 @@ void retro_set_environment(retro_environment_t cb)
{ "genesis_plus_gx_lock_on", "Cartridge lock-on; disabled|game genie|action replay (pro)|sonic & knuckles" },
{ "genesis_plus_gx_ym2413", "Master System FM; auto|disabled|enabled" },
{ "genesis_plus_gx_dac_bits", "YM2612 DAC quantization; disabled|enabled" },
{ "genesis_plus_gx_ym2612", "YM2612 core; mame|nuked opn2" },
#ifdef HAVE_YM3438_CORE
{ "genesis_plus_gx_ym3438", "YM2612/YM3438 core; mame|nuked opn2" },
#endif
{ "genesis_plus_gx_audio_filter", "Audio filter; disabled|low-pass" },
{ "genesis_plus_gx_lowpass_range", "Low-pass filter %; 60|65|70|75|80|85|90|95|5|10|15|20|25|30|35|40|45|50|55"},

6
libretro/osd.h
View File

@ -74,6 +74,8 @@ typedef unsigned char bool;
#define CHEATS_UPDATE() ROMCheatUpdate()
#define HAVE_YM3438_CORE
typedef struct
{
int8 device;
@ -89,7 +91,9 @@ struct
uint8 hq_psg;
uint8 dac_bits;
uint8 ym2413;
uint8 ym2612;
#ifdef HAVE_YM3438_CORE
uint8 ym3438;
#endif
uint8 mono;
int16 psg_preamp;
int16 fm_preamp;