prepare for NES platform

This commit is contained in:
tildearrow 2021-12-03 16:04:07 -05:00
parent 901ab6d436
commit c543553b0f
4 changed files with 937 additions and 0 deletions

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@ -34,6 +34,7 @@ src/engine/platform/sound/sn76496.cpp
src/engine/platform/sound/gb/apu.c
src/engine/platform/sound/gb/timing.c
src/engine/platform/sound/pce_psg.cpp
src/engine/platform/sound/nes/apu.c
src/engine/blip_buf.c
src/engine/safeReader.cpp

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@ -0,0 +1,227 @@
/*
* Copyright (C) 2010-2019 Fabio Cavallo (aka FHorse)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// additional modifications by tildearrow for furnace
#include <string.h>
#include "apu.h"
void apu_tick(BYTE *hwtick) {
/* sottraggo il numero di cicli eseguiti */
apu.cycles--;
/*
* questo flag sara' a TRUE solo nel ciclo
* in cui viene eseguito il length counter.
*/
apu.length_clocked = FALSE;
/*
* se e' settato il delay del $4017, essendo
* questo il ciclo successivo, valorizzo il
* registro.
*/
#if defined (VECCHIA_GESTIONE_JITTER)
if (r4017.jitter.delay) {
r4017.jitter.delay = FALSE;
r4017_jitter();
}
#else
if (r4017.jitter.delay) {
r4017.jitter.delay = FALSE;
r4017_jitter(0)
}
r4017_reset_frame()
#endif
/* quando apu.cycles e' a 0 devo eseguire uno step */
if (!apu.cycles) {
switch (apu.step) {
case 0:
/*
* nel mode 1 devo eseguire il
* length counter e lo sweep.
*/
if (apu.mode == APU_48HZ) {
length_clock()
sweep_clock()
}
envelope_clock()
/* triangle's linear counter */
linear_clock()
/* passo al prossimo step */
apu_change_step(++apu.step);
break;
case 1:
/* nel mode 0 devo eseguire il length counter */
if (apu.mode == APU_60HZ) {
length_clock()
sweep_clock()
}
envelope_clock()
/* triangle's linear counter */
linear_clock()
/* passo al prossimo step */
apu_change_step(++apu.step);
break;
case 2:
/*
* nel mode 1 devo eseguire il
* length counter e lo sweep.
*/
if (apu.mode == APU_48HZ) {
length_clock()
sweep_clock()
}
envelope_clock()
/* triangle's linear counter */
linear_clock()
/* passo al prossimo step */
apu_change_step(++apu.step);
break;
case 3:
/*
* gli step 3, 4 e 5 settano il bit 6 del $4015
* ma solo nel 4 genero un IRQ.
*/
if (apu.mode == APU_60HZ) {
/*
* se e' a 0 il bit 6 del $4017 (interrupt
* inhibit flag) allora devo generare un IRQ.
*/
if (!(r4017.value & 0x40)) {
/* setto il bit 6 del $4015 */
r4015.value |= 0x40;
}
} else {
/* nel mode 1 devo eseguire l'envelope */
envelope_clock()
/* triangle's linear counter */
linear_clock()
}
/* passo al prossimo step */
apu_change_step(++apu.step);
break;
case 4:
/*
* gli step 3, 4 e 5 settano il bit 6 del $4015
* ma solo nel 4 genero un IRQ.
*/
if (apu.mode == APU_60HZ) {
length_clock()
sweep_clock()
envelope_clock()
/* triangle's linear counter */
linear_clock()
/*
* se e' a 0 il bit 6 del $4017 (interrupt
* inhibit flag) allora devo generare un IRQ.
*/
if (!(r4017.value & 0x40)) {
/* setto il bit 6 del $4015 */
r4015.value |= 0x40;
}
}
/* passo al prossimo step */
apu_change_step(++apu.step);
break;
case 5:
/*
* gli step 3, 4 e 5 settano il bit 6 del $4015
* ma solo nel 4 genero un IRQ.
*/
if (apu.mode == APU_60HZ) {
/*
* se e' a 0 il bit 6 del $4017 (interrupt
* inhibit flag) allora devo generare un IRQ.
*/
if (!(r4017.value & 0x40)) {
/* setto il bit 6 del $4015 */
r4015.value |= 0x40;
}
apu.step++;
} else {
/* nel mode 1 devo ricominciare il ciclo */
apu.step = 0;
}
/* passo al prossimo step */
apu_change_step(apu.step);
break;
case 6:
/* da qui ci passo solo nel mode 0 */
envelope_clock()
/* triangle's linear counter */
linear_clock()
/* questo e' il passaggio finale del mode 0 */
apu.step = 1;
/* passo al prossimo step */
apu_change_step(apu.step);
break;
}
}
/*
* eseguo un ticket per ogni canale
* valorizzandone l'output.
*/
square_tick(S1, 0, apu)
square_tick(S2, 0, apu)
triangle_tick()
noise_tick()
dmc_tick()
// TODO
/*if (snd_apu_tick) {
snd_apu_tick();
}*/
r4011.cycles++;
}
void apu_turn_on(void) {
memset(&apu, 0x00, sizeof(apu));
memset(&r4015, 0x00, sizeof(r4015));
memset(&r4017, 0x00, sizeof(r4017));
/* azzero tutte le variabili interne dei canali */
memset(&S1, 0x00, sizeof(S1));
memset(&S2, 0x00, sizeof(S2));
memset(&TR, 0x00, sizeof(TR));
memset(&NS, 0x00, sizeof(NS));
memset(&DMC, 0x00, sizeof(DMC));
/* al reset e' sempre settato a 60Hz */
apu.mode = APU_60HZ;
apu.type = 0;
apu_change_step(apu.step);
/* valori iniziali dei vari canali */
S1.frequency = 1;
S1.sweep.delay = 1;
S1.sweep.divider = 1;
S2.frequency = 1;
S2.sweep.delay = 1;
S2.sweep.divider = 1;
TR.frequency = 1;
TR.sequencer = 0;
NS.frequency = 1;
NS.shift = 1;
DMC.frequency = 1;
DMC.empty = TRUE;
DMC.silence = TRUE;
DMC.counter_out = 8;
// sembra che l'address del DMC al power on dia valorizzato a 0xC000
// e la lunghezza del sample sia settato a 1 byte.
// http://forums.nesdev.com/viewtopic.php?f=3&t=18278
DMC.length = 1;
DMC.address_start = 0xC000;
}

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@ -0,0 +1,633 @@
/*
* Copyright (C) 2010-2019 Fabio Cavallo (aka FHorse)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// additional modifications by tildearrow for furnace
#ifndef APU_H_
#define APU_H_
#include "common.h"
enum dmc_types_of_dma { DMC_NORMAL, DMC_CPU_WRITE, DMC_R4014, DMC_NNL_DMA };
enum apu_channels { APU_S1, APU_S2, APU_TR, APU_NS, APU_DMC, APU_EXTRA, APU_MASTER };
enum apu_mode { APU_60HZ, APU_48HZ };
int cpu_cycles;
int cpu_opcode_cycle;
unsigned char* addrSpace;
#define apu_pre_amp 1.4f
/* length counter */
#define length_run(channel)\
/*\
* se non e' settato il flag halt e il length\
* counter non e' 0 allora devo decrementarlo.\
*/\
if (!channel.length.halt && channel.length.value) {\
channel.length.value--;\
}
#define length_clock()\
apu.length_clocked = TRUE;\
length_run(S1)\
length_run(S2)\
length_run(TR)\
length_run(NS)
/* envelope */
#define envelope_run(channel)\
if (channel.envelope.enabled) {\
channel.envelope.enabled = FALSE;\
channel.envelope.counter = 15;\
channel.envelope.delay = (channel.envelope.divider + 1);\
} else if (!(--channel.envelope.delay)) {\
channel.envelope.delay = (channel.envelope.divider + 1);\
if (channel.envelope.counter | channel.length.halt) {\
channel.envelope.counter = (channel.envelope.counter - 1) & 0x0F;\
}\
}
#define envelope_volume(channel)\
/* setto il volume */\
if (!channel.length.value) {\
channel.volume = 0;\
} else if (channel.envelope.constant_volume) {\
channel.volume = channel.envelope.divider;\
} else {\
channel.volume = channel.envelope.counter;\
}
#define envelope_clock()\
envelope_run(S1)\
envelope_run(S2)\
envelope_run(NS)
/* sweep */
#define sweep_run(channel, negative_adjust)\
if (!(--channel.sweep.delay)) {\
channel.sweep.delay = (channel.sweep.divider + 1);\
if (channel.sweep.enabled && channel.sweep.shift && (channel.timer >= 8)) {\
SWORD offset = channel.timer >> channel.sweep.shift;\
if (channel.sweep.negate) {\
channel.timer += ((SWORD) negative_adjust - offset);\
} else if ((channel.timer + offset) <= 0x800) {\
channel.timer += offset;\
}\
}\
sweep_silence(channel)\
}\
if (channel.sweep.reload) {\
channel.sweep.reload = FALSE;\
channel.sweep.delay = (channel.sweep.divider + 1);\
}
#define sweep_silence(channel)\
{\
WORD offset = channel.timer >> channel.sweep.shift;\
channel.sweep.silence = FALSE;\
if ((channel.timer <= 8) || (!channel.sweep.negate && ((channel.timer + offset) >= 0x800))) {\
channel.sweep.silence = TRUE;\
}\
}
#define sweep_clock()\
sweep_run(S1, -1)\
sweep_run(S2, 0)
/* linear counter */
#define linear_clock()\
if (TR.linear.halt) {\
TR.linear.value = TR.linear.reload;\
} else if (TR.linear.value) {\
TR.linear.value--;\
}\
if (!TR.length.halt) {\
TR.linear.halt = FALSE;\
}
/* output */
#define square_output(square, swap)\
{\
envelope_volume(square)\
if (square.sweep.silence) {\
square.output = 0;\
} else {\
square.output = square_duty[swap][square.duty][square.sequencer] * square.volume;\
}\
}
#define triangle_output()\
/*\
* ai 2 cicli piu' bassi del timer, la frequenza\
* risultante e' troppo alta (oltre i 20 kHz,\
* quindi non udibile), percio' la taglio.\
*/\
TR.output = triangle_duty[TR.sequencer];\
if (TR.timer < 2) {\
TR.output = triangle_duty[8];\
}
#define noise_output()\
envelope_volume(NS)\
NS.output = 0;\
if (NS.length.value && !(NS.shift & 0x0001)) {\
NS.output = NS.volume;\
}
#define dmc_output()\
DMC.output = DMC.counter & 0x7F
/* tick */
#define square_tick(square, swap, type)\
if (!(--square.frequency)) {\
square_output(square, swap)\
square.frequency = (square.timer + 1) << 1;\
square.sequencer = (square.sequencer + 1) & 0x07;\
type.clocked = TRUE;\
}
#define triangle_tick()\
if (!(--TR.frequency)) {\
TR.frequency = TR.timer + 1;\
if (TR.length.value && TR.linear.value) {\
TR.sequencer = (TR.sequencer + 1) & 0x1F;\
triangle_output()\
apu.clocked = TRUE;\
}\
}
#define noise_tick()\
if (!(--NS.frequency)) {\
if (NS.mode) {\
NS.shift = (NS.shift >> 1) | (((NS.shift ^ (NS.shift >> 6)) & 0x0001) << 14);\
} else {\
NS.shift = (NS.shift >> 1) | (((NS.shift ^ (NS.shift >> 1)) & 0x0001) << 14);\
}\
NS.shift &= 0x7FFF;\
noise_output()\
NS.frequency = noise_timer[apu.type][NS.timer];\
apu.clocked = TRUE;\
}
#define dmc_tick()\
if (!(--DMC.frequency)) {\
if (!DMC.silence) {\
if (!(DMC.shift & 0x01)) {\
if (DMC.counter > 1) {\
DMC.counter -= 2;\
}\
} else {\
if (DMC.counter < 126) {\
DMC.counter += 2;\
}\
}\
}\
DMC.shift >>= 1;\
dmc_output();\
if (!(--DMC.counter_out)) {\
DMC.counter_out = 8;\
if (!DMC.empty) {\
DMC.shift = DMC.buffer;\
DMC.empty = TRUE;\
DMC.silence = FALSE;\
} else {\
DMC.silence = TRUE;\
}\
}\
DMC.frequency = dmc_rate[apu.type][DMC.rate_index];\
apu.clocked = TRUE;\
}\
if (DMC.empty && DMC.remain) {\
BYTE tick = 4;\
switch (DMC.tick_type) {\
case DMC_CPU_WRITE:\
tick = 3;\
break;\
case DMC_R4014:\
tick = 2;\
break;\
case DMC_NNL_DMA:\
tick = 1;\
break;\
}\
{\
DMC.buffer = addrSpace[DMC.address];\
}\
/* incremento gli hwtick da compiere */\
if (hwtick) { hwtick[0] += tick; }\
/* e naturalmente incremento anche quelli eseguiti dall'opcode */\
cpu_cycles += tick;\
/* salvo a che ciclo dell'istruzione avviene il dma */\
DMC.dma_cycle = cpu_opcode_cycle;\
/* il DMC non e' vuoto */\
DMC.empty = FALSE;\
if (++DMC.address > 0xFFFF) {\
DMC.address = 0x8000;\
}\
if (!(--DMC.remain)) {\
if (DMC.loop) {\
DMC.remain = DMC.length;\
DMC.address = DMC.address_start;\
} else if (DMC.irq_enabled) {\
r4015.value |= 0x80;\
}\
}\
}
#define apu_change_step(index)\
apu.cycles += apuPeriod[apu.mode][apu.type][index]
#if defined (VECCHIA_GESTIONE_JITTER)
#define r4017_jitter()\
r4017.value = (r4017.jitter.value & 0xC0);\
/*\
* se il bit 7 e' a zero, devo attivare la\
* modalita' NTSC, se a uno quella PAL.\
*/\
if (r4017.value & 0x80) {\
apu.mode = APU_48HZ;\
} else {\
apu.mode = APU_60HZ;\
}\
if (r4017.value & 0x40) {\
/* azzero il bit 6 del $4015 */\
r4015.value &= 0xBF;\
/* questo non e' affatto necessario sul forno */\
}\
/* riavvio il frame audio */\
apu.step = apu.cycles = 0;\
apu_change_step(apu.step)
#else
#define r4017_jitter(apc)\
r4017.value = (r4017.jitter.value & 0xC0);\
r4017.reset_frame_delay = 1;\
if (apu.cycles == apc) {\
if (apu.mode == APU_48HZ) {\
r4017.reset_frame_delay += 1;\
} else {\
r4017.reset_frame_delay += 2;\
}\
}\
/*\
* se il bit 7 e' a zero, devo attivare la\
* modalita' NTSC, se a uno quella PAL.\
*/\
if (r4017.value & 0x80) {\
apu.mode = APU_48HZ;\
} else {\
apu.mode = APU_60HZ;\
}\
if (r4017.value & 0x40) {\
/* azzero il bit 6 del $4015 */\
r4015.value &= 0xBF;\
/* questo non e' affatto necessario sul forno */\
}
#define r4017_reset_frame()\
if (r4017.reset_frame_delay && (--r4017.reset_frame_delay == 0)) {\
/* riavvio il frame audio */\
apu.step = apu.cycles = 0;\
apu_change_step(apu.step);\
}
#endif
#define square_reg0(square)\
/* duty */\
square.duty = value >> 6;\
/* length counter */\
square.length.halt = value & 0x20;\
/* envelope */\
square.envelope.constant_volume = value & 0x10;\
square.envelope.divider = value & 0x0F
#define square_reg1(square)\
/* sweep */\
square.sweep.reload = TRUE;\
square.sweep.divider = (value >> 4) & 0x07;\
square.sweep.shift = value & 0x07;\
square.sweep.enabled = value & 0x80;\
square.sweep.negate = value & 0x08
#define square_reg2(square)\
/* timer (low 8 bits) */\
square.timer = (square.timer & 0x0700) | value
#define square_reg3(square)\
/* length counter */\
/*\
* se non disabilitato, una scrittura in\
* questo registro, carica immediatamente il\
* length counter del canale, tranne nel caso\
* in cui la scrittura avvenga nello stesso\
* momento del clock di un length counter e\
* con il length diverso da zero.\
*/\
if (square.length.enabled && !(apu.length_clocked && square.length.value)) {\
square.length.value = length_table[value >> 3];\
}\
/* envelope */\
square.envelope.enabled = TRUE;\
/* timer (high 3 bits) */\
square.timer = (square.timer & 0x00FF) | ((value & 0x07) << 8);\
/*The correct behaviour is to reset the duty cycle sequencers but not the clock dividers*/\
/*square.frequency = 1;*/\
/* sequencer */\
square.sequencer = 0
#define init_nla_table(p, t)\
{\
WORD i;\
for (i = 0; i < LENGTH(nla_table.pulse); i++) {\
double vl = 95.52 / (8128.0 / (double) i + 100.0);\
nla_table.pulse[i] = (vl * p);\
}\
for (i = 0; i < LENGTH(nla_table.tnd); i++) {\
double vl = 163.67 / (24329.0 / (double) i + 100.0);\
nla_table.tnd[i] = (vl * t);\
}\
}
#define _apu_channel_volume_adjust(ch, index)\
((ch * cfg->apu.channel[index]) * ch_gain_ptnd(index))
#define s1_out\
_apu_channel_volume_adjust(S1.output, APU_S1)
#define s2_out\
_apu_channel_volume_adjust(S2.output, APU_S2)
#define tr_out\
_apu_channel_volume_adjust(TR.output, APU_TR)
#define ns_out\
_apu_channel_volume_adjust(NS.output, APU_NS)
#define dmc_out\
_apu_channel_volume_adjust(DMC.output, APU_DMC)
#define extra_out(ch)\
(ch * cfg->apu.channel[APU_EXTRA])
#define pulse_output()\
nla_table.pulse[(int) (s1_out + s2_out)]
#define tnd_output()\
nla_table.tnd[(int) ((tr_out * 3) + (ns_out * 2) + dmc_out)]
typedef struct _config_apu {
BYTE channel[APU_MASTER + 1];
double volume[APU_MASTER + 1];
} _config_apu;
typedef struct _apu {
BYTE mode;
BYTE type;
BYTE step;
BYTE length_clocked;
BYTE DMC;
SWORD cycles;
/* ------------------------------------------------------- */
/* questi valori non e' necessario salvarli nei savestates */
/* ------------------------------------------------------- */
/* */ BYTE clocked; /* */
/* ------------------------------------------------------- */
} _apu;
typedef struct _r4011 {
BYTE value;
DBWORD frames;
DBWORD cycles;
SWORD output;
} _r4011;
typedef struct _r4015 {
BYTE value;
} _r4015;
typedef struct _r4017 {
BYTE value;
struct _r4017_litter {
BYTE value;
BYTE delay;
} jitter;
BYTE reset_frame_delay;
} _r4017;
typedef struct _envelope {
BYTE enabled;
BYTE divider;
BYTE counter;
BYTE constant_volume;
SBYTE delay;
} _envelope;
typedef struct _sweep {
BYTE enabled;
BYTE negate;
BYTE divider;
BYTE shift;
BYTE reload;
BYTE silence;
SBYTE delay;
} _sweep;
typedef struct _length_counter {
BYTE value;
BYTE enabled;
BYTE halt;
} _length_counter;
typedef struct _linear_counter {
BYTE value;
BYTE reload;
BYTE halt;
} _linear_counter;
typedef struct _apuSquare {
/* timer */
DBWORD timer;
/* ogni quanti cicli devo generare un output */
WORD frequency;
/* duty */
BYTE duty;
/* envelope */
_envelope envelope;
/* volume */
BYTE volume;
/* sequencer */
BYTE sequencer;
/* sweep */
_sweep sweep;
/* length counter */
_length_counter length;
/* output */
SWORD output;
} _apuSquare;
typedef struct _apuTriangle {
/* timer */
DBWORD timer;
/* ogni quanti cicli devo generare un output */
WORD frequency;
/* linear counter */
_linear_counter linear;
/* length counter */
_length_counter length;
/* sequencer */
BYTE sequencer;
/* output */
SWORD output;
} _apuTriangle;
typedef struct _apuNoise {
/* timer */
DBWORD timer;
/* ogni quanti cicli devo generare un output */
WORD frequency;
/* envelope */
_envelope envelope;
/* specifico del noise */
BYTE mode;
/* volume */
BYTE volume;
/* shift register */
WORD shift;
/* length counter */
_length_counter length;
/* sequencer */
BYTE sequencer;
/* output */
SWORD output;
} _apuNoise;
typedef struct _apuDMC {
/* ogni quanti cicli devo generare un output */
WORD frequency;
WORD remain;
BYTE irq_enabled;
BYTE loop;
BYTE rate_index;
WORD address_start;
DBWORD address;
WORD length;
BYTE counter;
BYTE empty;
BYTE buffer;
/* DMA */
BYTE dma_cycle;
/* output unit */
BYTE silence;
BYTE shift;
BYTE counter_out;
/* output */
SWORD output;
/* misc */
BYTE tick_type;
} _apuDMC;
#if defined (__cplusplus)
#define EXTERNC extern "C"
#else
#define EXTERNC
#endif
EXTERNC struct _nla_table {
SWORD pulse[32];
SWORD tnd[203];
} nla_table;
EXTERNC _apu apu;
EXTERNC _r4011 r4011;
EXTERNC _r4015 r4015;
EXTERNC _r4017 r4017;
EXTERNC _apuSquare S1, S2;
EXTERNC _apuTriangle TR;
EXTERNC _apuNoise NS;
EXTERNC _apuDMC DMC;
/* apuPeriod[mode][type][cycles] */
static const WORD apuPeriod[2][3][7] = {
/*
* Mode 0: 4-step sequence
* Action Envelopes & Length Counter& Interrupt Delay to next
* Linear Counter Sweep Units Flag NTSC PAL Dendy
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* $4017=$00 - - - 7459 8315 7459
* Step 1 Clock - - 7456 8314 7456
* Step 2 Clock Clock - 7458 8312 7458
* Step 3 Clock - - 7458 8314 7458
* Step 4 Clock Clock Set if enabled 7458 8314 7458
*/
{
{7459, 7456, 7458, 7457, 1, 1, 7457},
{8315, 8314, 8312, 8313, 1, 1, 8313},
{7459, 7456, 7458, 7457, 1, 1, 7457}
},
/*
* Mode 1: 5-step sequence
* Action Envelopes & Length Counter& Interrupt Delay to next
* Linear Counter Sweep Units Flag NTSC PAL Dendy
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* $4017=$80 - - - 1 1 1
* Step 1 Clock Clock - 7458 8314 7458
* Step 2 Clock - - 7456 8314 7456
* Step 3 Clock Clock - 7458 8312 7458
* Step 4 Clock - - 7458 8314 7458
* Step 5 - - - 7452 8312 7452
*
* Note:
* il 7452 e il 8312 dello step 5 diventano 7451 e 8311
* nella mia tabella perche' il ciclo mancante lo eseguo
* all'inizio del ciclo successivo.
*/
{
{1, 7458, 7456, 7458, 7458, 7451, 0},
{1, 8314, 8314, 8312, 8314, 8311, 0},
{1, 7458, 7456, 7458, 7458, 7451, 0}
}
};
/* la tabella con i valori da caricare nel length counter del canale */
static const BYTE length_table[32] = {
0x0A, 0xFE, 0x14, 0x02, 0x28, 0x04, 0x50, 0x06,
0xA0, 0x08, 0x3C, 0x0A, 0x0E, 0x0C, 0x1A, 0x0E,
0x0C, 0x10, 0x18, 0x12, 0x30, 0x14, 0x60, 0x16,
0xC0, 0x18, 0x48, 0x1A, 0x10, 0x1C, 0x20, 0x1E
};
static const BYTE square_duty[2][4][8] = {
{
{ 1, 0, 0, 0, 0, 0, 0, 0},
{ 1, 1, 0, 0, 0, 0, 0, 0},
{ 1, 1, 1, 1, 0, 0, 0, 0},
{ 0, 0, 1, 1, 1, 1, 1, 1}
},
{
{ 1, 0, 0, 0, 0, 0, 0, 0},
{ 1, 1, 1, 1, 0, 0, 0, 0},
{ 1, 1, 0, 0, 0, 0, 0, 0},
{ 0, 0, 1, 1, 1, 1, 1, 1}
},
};
static const BYTE triangle_duty[32] = {
0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08,
0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
};
static const WORD noise_timer[3][16] = {
{
0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0060, 0x0080, 0x00A0,
0x00CA, 0x00FE, 0x017C, 0x01FC, 0x02FA, 0x03F8, 0x07F2, 0x0FE4
},
{
0x0004, 0x0007, 0x000E, 0x001E, 0x003C, 0x0058, 0x0076, 0x0094,
0x00BC, 0x00EC, 0x0162, 0x01D8, 0x02C4, 0x03B0, 0x0762, 0x0EC2
},
{
0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0060, 0x0080, 0x00A0,
0x00CA, 0x00FE, 0x017C, 0x01FC, 0x02FA, 0x03F8, 0x07F2, 0x0FE4
}
};
static const WORD dmc_rate[3][16] = {
{
0x01AC, 0x017C, 0x0154, 0x0140, 0x011E, 0x00FE, 0x00E2, 0x00D6,
0x00BE, 0x00A0, 0x008E, 0x0080, 0x006A, 0x0054, 0x0048, 0x0036
},
{
0x018E, 0x0162, 0x013C, 0x012A, 0x0114, 0x00EC, 0x00D2, 0x00C6,
0x00B0, 0x0094, 0x0084, 0x0076, 0x0062, 0x004E, 0x0042, 0x0032
},
{
0x01AC, 0x017C, 0x0154, 0x0140, 0x011E, 0x00FE, 0x00E2, 0x00D6,
0x00BE, 0x00A0, 0x008E, 0x0080, 0x006A, 0x0054, 0x0048, 0x0036
}
};
EXTERNC void apu_tick(BYTE *hwtick);
EXTERNC void apu_turn_on(void);
#undef EXTERNC
#endif /* APU_H_ */

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@ -0,0 +1,76 @@
/*
* Copyright (C) 2010-2019 Fabio Cavallo (aka FHorse)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// additional modifications by tildearrow for furnace
#ifndef COMMON_H_
#define COMMON_H_
#include <stdint.h>
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned int DBWORD;
typedef signed char SBYTE;
typedef signed short SWORD;
typedef signed int SDBWORD;
#if !defined (FALSE)
enum false_value { FALSE, TRUE };
#endif
enum exit_type { EXIT_OK, EXIT_ERROR };
enum lower_value { LOWER, UPPER };
enum machine_mode { AUTO, NTSC, PAL, DENDY, DEFAULT = 255 };
enum reset_type {
RESET = 0x10,
HARD = 0x20,
CHANGE_ROM = 0x30,
CHANGE_MODE = 0x40,
POWER_UP = 0x50
};
/* le dimesioni dello screen da renderizzare */
enum screen_dimension { SCR_LINES = 240, SCR_ROWS = 256 };
enum type_of_system_info { HEADER, DATABASE };
enum header_type { iNES_1_0, NES_2_0, UNIF_FORMAT, FDS_FORMAT, NSF_FORMAT, NSFE_FORMAT };
enum length_file_name_type {
LENGTH_FILE_NAME = 512,
LENGTH_FILE_NAME_MID = 1024,
LENGTH_FILE_NAME_LONG = 2048,
LENGTH_FILE_NAME_MAX = 4096
};
enum forced_mirroring { UNK_HORIZONTAL, UNK_VERTICAL };
enum max_chips_rom { MAX_CHIPS = 8 };
enum languages { LNG_ENGLISH, LNG_ITALIAN, LNG_RUSSIAN };
enum database_mode {
NODIPSWITCH = 0xFF00,
NOEXTRA = 0x0000,
VSZAPPER = 0x0001,
CHRRAM32K = 0x0002,
CHRRAM256K = 0x0004
};
#define LENGTH(x) (sizeof(x)/sizeof(*(x)))
#define UNUSED(var) var __attribute__((unused))
#if defined (DEBUG)
#define INLINE
#else
#define INLINE inline __attribute__((always_inline))
#endif
#endif /* COMMON_H_ */