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author | 2015-11-08 12:56:12 +0100 | |
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committer | 2015-11-08 12:56:12 +0100 | |
commit | 7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch) | |
tree | f310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/devices/sound/fm2612.cpp | |
parent | a57b46ae933badd7441ce1644711dbb851e2b504 (diff) |
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/devices/sound/fm2612.cpp')
-rw-r--r-- | src/devices/sound/fm2612.cpp | 2561 |
1 files changed, 2561 insertions, 0 deletions
diff --git a/src/devices/sound/fm2612.cpp b/src/devices/sound/fm2612.cpp new file mode 100644 index 00000000000..22e7e8b7749 --- /dev/null +++ b/src/devices/sound/fm2612.cpp @@ -0,0 +1,2561 @@ +// license:??? +// copyright-holders:Jarek Burczynski,Tatsuyuki Satoh +/* +** +** File: fm2612.c -- software implementation of Yamaha YM2612 FM sound generator +** Split from fm.c to keep 2612 fixes from infecting other OPN chips +** +** Copyright Jarek Burczynski (bujar at mame dot net) +** Copyright Tatsuyuki Satoh , MultiArcadeMachineEmulator development +** +** Version 1.5.1 (Genesis Plus GX ym2612.c rev. 368) +** +*/ + +/* +** History: +** +** 2006~2009 Eke-Eke (Genesis Plus GX): +** Huge thanks to Nemesis, lot of those fixes came from his tests on Sega Genesis hardware +** More informations at http://gendev.spritesmind.net/forum/viewtopic.php?t=386 +** +** TODO: +** +** - core documentation +** - BUSY flag support +** +** CHANGELOG: +** +** 07-30-2014 dink (FB Alpha project): +** - fixed missing dac channel on savestate load +** +** xx-xx-xxxx +** - fixed LFO implementation: +** .added support for CH3 special mode: fixes various sound effects (birds in Warlock, bug sound in Aladdin...) +** .inverted LFO AM waveform: fixes Spider-Man & Venom : Separation Anxiety (intro), California Games (surfing event) +** .improved LFO timing accuracy: now updated AFTER sample output, like EG/PG updates, and without any precision loss anymore. +** - improved internal timers emulation +** - adjusted lowest EG rates increment values +** - fixed Attack Rate not being updated in some specific cases (Batman & Robin intro) +** - fixed EG behavior when Attack Rate is maximal +** - fixed EG behavior when SL=0 (Mega Turrican tracks 03,09...) or/and Key ON occurs at minimal attenuation +** - implemented EG output immediate changes on register writes +** - fixed YM2612 initial values (after the reset): fixes missing intro in B.O.B +** - implemented Detune overflow (Ariel, Comix Zone, Shaq Fu, Spiderman & many other games using GEMS sound engine) +** - implemented accurate CSM mode emulation +** - implemented accurate SSG-EG emulation (Asterix, Beavis&Butthead, Bubba'n Stix & many other games) +** - implemented accurate address/data ports behavior +** +** 06-23-2007 Zsolt Vasvari: +** - changed the timing not to require the use of floating point calculations +** +** 03-08-2003 Jarek Burczynski: +** - fixed YM2608 initial values (after the reset) +** - fixed flag and irqmask handling (YM2608) +** - fixed BUFRDY flag handling (YM2608) +** +** 14-06-2003 Jarek Burczynski: +** - implemented all of the YM2608 status register flags +** - implemented support for external memory read/write via YM2608 +** - implemented support for deltat memory limit register in YM2608 emulation +** +** 22-05-2003 Jarek Burczynski: +** - fixed LFO PM calculations (copy&paste bugfix) +** +** 08-05-2003 Jarek Burczynski: +** - fixed SSG support +** +** 22-04-2003 Jarek Burczynski: +** - implemented 100% correct LFO generator (verified on real YM2610 and YM2608) +** +** 15-04-2003 Jarek Burczynski: +** - added support for YM2608's register 0x110 - status mask +** +** 01-12-2002 Jarek Burczynski: +** - fixed register addressing in YM2608, YM2610, YM2610B chips. (verified on real YM2608) +** The addressing patch used for early Neo-Geo games can be removed now. +** +** 26-11-2002 Jarek Burczynski, Nicola Salmoria: +** - recreated YM2608 ADPCM ROM using data from real YM2608's output which leads to: +** - added emulation of YM2608 drums. +** - output of YM2608 is two times lower now - same as YM2610 (verified on real YM2608) +** +** 16-08-2002 Jarek Burczynski: +** - binary exact Envelope Generator (verified on real YM2203); +** identical to YM2151 +** - corrected 'off by one' error in feedback calculations (when feedback is off) +** - corrected connection (algorithm) calculation (verified on real YM2203 and YM2610) +** +** 18-12-2001 Jarek Burczynski: +** - added SSG-EG support (verified on real YM2203) +** +** 12-08-2001 Jarek Burczynski: +** - corrected sin_tab and tl_tab data (verified on real chip) +** - corrected feedback calculations (verified on real chip) +** - corrected phase generator calculations (verified on real chip) +** - corrected envelope generator calculations (verified on real chip) +** - corrected FM volume level (YM2610 and YM2610B). +** - changed YMxxxUpdateOne() functions (YM2203, YM2608, YM2610, YM2610B, YM2612) : +** this was needed to calculate YM2610 FM channels output correctly. +** (Each FM channel is calculated as in other chips, but the output of the channel +** gets shifted right by one *before* sending to accumulator. That was impossible to do +** with previous implementation). +** +** 23-07-2001 Jarek Burczynski, Nicola Salmoria: +** - corrected YM2610 ADPCM type A algorithm and tables (verified on real chip) +** +** 11-06-2001 Jarek Burczynski: +** - corrected end of sample bug in ADPCMA_calc_cha(). +** Real YM2610 checks for equality between current and end addresses (only 20 LSB bits). +** +** 08-12-98 hiro-shi: +** rename ADPCMA -> ADPCMB, ADPCMB -> ADPCMA +** move ROM limit check.(CALC_CH? -> 2610Write1/2) +** test program (ADPCMB_TEST) +** move ADPCM A/B end check. +** ADPCMB repeat flag(no check) +** change ADPCM volume rate (8->16) (32->48). +** +** 09-12-98 hiro-shi: +** change ADPCM volume. (8->16, 48->64) +** replace ym2610 ch0/3 (YM-2610B) +** change ADPCM_SHIFT (10->8) missing bank change 0x4000-0xffff. +** add ADPCM_SHIFT_MASK +** change ADPCMA_DECODE_MIN/MAX. +*/ + + + + +/************************************************************************/ +/* comment of hiro-shi(Hiromitsu Shioya) */ +/* YM2610(B) = OPN-B */ +/* YM2610 : PSG:3ch FM:4ch ADPCM(18.5KHz):6ch DeltaT ADPCM:1ch */ +/* YM2610B : PSG:3ch FM:6ch ADPCM(18.5KHz):6ch DeltaT ADPCM:1ch */ +/************************************************************************/ + +#include "emu.h" +#include "fm.h" + +/* shared function building option */ +#define BUILD_OPN (BUILD_YM2203||BUILD_YM2608||BUILD_YM2610||BUILD_YM2610B||BUILD_YM2612||BUILD_YM3438) +#define BUILD_OPN_PRESCALER (BUILD_YM2203||BUILD_YM2608) + + +/* globals */ +#define TYPE_SSG 0x01 /* SSG support */ +#define TYPE_LFOPAN 0x02 /* OPN type LFO and PAN */ +#define TYPE_6CH 0x04 /* FM 6CH / 3CH */ +#define TYPE_DAC 0x08 /* YM2612's DAC device */ +#define TYPE_ADPCM 0x10 /* two ADPCM units */ +#define TYPE_2610 0x20 /* bogus flag to differentiate 2608 from 2610 */ + + +#define TYPE_YM2203 (TYPE_SSG) +#define TYPE_YM2608 (TYPE_SSG |TYPE_LFOPAN |TYPE_6CH |TYPE_ADPCM) +#define TYPE_YM2610 (TYPE_SSG |TYPE_LFOPAN |TYPE_6CH |TYPE_ADPCM |TYPE_2610) +#define TYPE_YM2612 (TYPE_DAC |TYPE_LFOPAN |TYPE_6CH) + + +/* globals */ +#define FREQ_SH 16 /* 16.16 fixed point (frequency calculations) */ +#define EG_SH 16 /* 16.16 fixed point (envelope generator timing) */ +#define LFO_SH 24 /* 8.24 fixed point (LFO calculations) */ +#define TIMER_SH 16 /* 16.16 fixed point (timers calculations) */ + +#define FREQ_MASK ((1<<FREQ_SH)-1) + +#define MAXOUT (+32767) +#define MINOUT (-32768) + +/* envelope generator */ +#define ENV_BITS 10 +#define ENV_LEN (1<<ENV_BITS) +#define ENV_STEP (128.0/ENV_LEN) + +#define MAX_ATT_INDEX (ENV_LEN-1) /* 1023 */ +#define MIN_ATT_INDEX (0) /* 0 */ + +#define EG_ATT 4 +#define EG_DEC 3 +#define EG_SUS 2 +#define EG_REL 1 +#define EG_OFF 0 + +/* operator unit */ +#define SIN_BITS 10 +#define SIN_LEN (1<<SIN_BITS) +#define SIN_MASK (SIN_LEN-1) + +#define TL_RES_LEN (256) /* 8 bits addressing (real chip) */ + +/* TL_TAB_LEN is calculated as: +* 13 - sinus amplitude bits (Y axis) +* 2 - sinus sign bit (Y axis) +* TL_RES_LEN - sinus resolution (X axis) +*/ +#define TL_TAB_LEN (13*2*TL_RES_LEN) +static signed int tl_tab[TL_TAB_LEN]; + +#define ENV_QUIET (TL_TAB_LEN>>3) + +/* sin waveform table in 'decibel' scale */ +static unsigned int sin_tab[SIN_LEN]; + +/* sustain level table (3dB per step) */ +/* bit0, bit1, bit2, bit3, bit4, bit5, bit6 */ +/* 1, 2, 4, 8, 16, 32, 64 (value)*/ +/* 0.75, 1.5, 3, 6, 12, 24, 48 (dB)*/ + +/* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/ +/* attenuation value (10 bits) = (SL << 2) << 3 */ +#define SC(db) (UINT32) ( db * (4.0/ENV_STEP) ) +static const UINT32 sl_table[16]={ + SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), + SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) +}; +#undef SC + + +#define RATE_STEPS (8) +static const UINT8 eg_inc[19*RATE_STEPS]={ +/*cycle:0 1 2 3 4 5 6 7*/ + +/* 0 */ 0,1, 0,1, 0,1, 0,1, /* rates 00..11 0 (increment by 0 or 1) */ +/* 1 */ 0,1, 0,1, 1,1, 0,1, /* rates 00..11 1 */ +/* 2 */ 0,1, 1,1, 0,1, 1,1, /* rates 00..11 2 */ +/* 3 */ 0,1, 1,1, 1,1, 1,1, /* rates 00..11 3 */ + +/* 4 */ 1,1, 1,1, 1,1, 1,1, /* rate 12 0 (increment by 1) */ +/* 5 */ 1,1, 1,2, 1,1, 1,2, /* rate 12 1 */ +/* 6 */ 1,2, 1,2, 1,2, 1,2, /* rate 12 2 */ +/* 7 */ 1,2, 2,2, 1,2, 2,2, /* rate 12 3 */ + +/* 8 */ 2,2, 2,2, 2,2, 2,2, /* rate 13 0 (increment by 2) */ +/* 9 */ 2,2, 2,4, 2,2, 2,4, /* rate 13 1 */ +/*10 */ 2,4, 2,4, 2,4, 2,4, /* rate 13 2 */ +/*11 */ 2,4, 4,4, 2,4, 4,4, /* rate 13 3 */ + +/*12 */ 4,4, 4,4, 4,4, 4,4, /* rate 14 0 (increment by 4) */ +/*13 */ 4,4, 4,8, 4,4, 4,8, /* rate 14 1 */ +/*14 */ 4,8, 4,8, 4,8, 4,8, /* rate 14 2 */ +/*15 */ 4,8, 8,8, 4,8, 8,8, /* rate 14 3 */ + +/*16 */ 8,8, 8,8, 8,8, 8,8, /* rates 15 0, 15 1, 15 2, 15 3 (increment by 8) */ +/*17 */ 16,16,16,16,16,16,16,16, /* rates 15 2, 15 3 for attack */ +/*18 */ 0,0, 0,0, 0,0, 0,0, /* infinity rates for attack and decay(s) */ +}; + + +#define O(a) (a*RATE_STEPS) + +/*note that there is no O(17) in this table - it's directly in the code */ +static const UINT8 eg_rate_select2612[32+64+32]={ /* Envelope Generator rates (32 + 64 rates + 32 RKS) */ +/* 32 infinite time rates (same as Rate 0) */ +O(18),O(18),O(18),O(18),O(18),O(18),O(18),O(18), +O(18),O(18),O(18),O(18),O(18),O(18),O(18),O(18), +O(18),O(18),O(18),O(18),O(18),O(18),O(18),O(18), +O(18),O(18),O(18),O(18),O(18),O(18),O(18),O(18), + +/* rates 00-11 */ +/* +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +*/ +O(18),O(18),O( 0),O( 0), +O( 0),O( 0),O( 2),O( 2), // Nemesis's tests + +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), +O( 0),O( 1),O( 2),O( 3), + +/* rate 12 */ +O( 4),O( 5),O( 6),O( 7), + +/* rate 13 */ +O( 8),O( 9),O(10),O(11), + +/* rate 14 */ +O(12),O(13),O(14),O(15), + +/* rate 15 */ +O(16),O(16),O(16),O(16), + +/* 32 dummy rates (same as 15 3) */ +O(16),O(16),O(16),O(16),O(16),O(16),O(16),O(16), +O(16),O(16),O(16),O(16),O(16),O(16),O(16),O(16), +O(16),O(16),O(16),O(16),O(16),O(16),O(16),O(16), +O(16),O(16),O(16),O(16),O(16),O(16),O(16),O(16) + +}; +#undef O + +/*rate 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15*/ +/*shift 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, 0, 0, 0 */ +/*mask 2047, 1023, 511, 255, 127, 63, 31, 15, 7, 3, 1, 0, 0, 0, 0, 0 */ + +#define O(a) (a*1) +static const UINT8 eg_rate_shift[32+64+32]={ /* Envelope Generator counter shifts (32 + 64 rates + 32 RKS) */ +/* 32 infinite time rates */ +/* O(0),O(0),O(0),O(0),O(0),O(0),O(0),O(0), +O(0),O(0),O(0),O(0),O(0),O(0),O(0),O(0), +O(0),O(0),O(0),O(0),O(0),O(0),O(0),O(0), +O(0),O(0),O(0),O(0),O(0),O(0),O(0),O(0), */ + +/* fixed (should be the same as rate 0, even if it makes no difference since increment value is 0 for these rates) */ +O(11),O(11),O(11),O(11),O(11),O(11),O(11),O(11), +O(11),O(11),O(11),O(11),O(11),O(11),O(11),O(11), +O(11),O(11),O(11),O(11),O(11),O(11),O(11),O(11), +O(11),O(11),O(11),O(11),O(11),O(11),O(11),O(11), + +/* rates 00-11 */ +O(11),O(11),O(11),O(11), +O(10),O(10),O(10),O(10), +O( 9),O( 9),O( 9),O( 9), +O( 8),O( 8),O( 8),O( 8), +O( 7),O( 7),O( 7),O( 7), +O( 6),O( 6),O( 6),O( 6), +O( 5),O( 5),O( 5),O( 5), +O( 4),O( 4),O( 4),O( 4), +O( 3),O( 3),O( 3),O( 3), +O( 2),O( 2),O( 2),O( 2), +O( 1),O( 1),O( 1),O( 1), +O( 0),O( 0),O( 0),O( 0), + +/* rate 12 */ +O( 0),O( 0),O( 0),O( 0), + +/* rate 13 */ +O( 0),O( 0),O( 0),O( 0), + +/* rate 14 */ +O( 0),O( 0),O( 0),O( 0), + +/* rate 15 */ +O( 0),O( 0),O( 0),O( 0), + +/* 32 dummy rates (same as 15 3) */ +O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0), +O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0), +O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0), +O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0),O( 0) + +}; +#undef O + +static const UINT8 dt_tab[4 * 32]={ +/* this is YM2151 and YM2612 phase increment data (in 10.10 fixed point format)*/ +/* FD=0 */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +/* FD=1 */ + 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, + 2, 3, 3, 3, 4, 4, 4, 5, 5, 6, 6, 7, 8, 8, 8, 8, +/* FD=2 */ + 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, + 5, 6, 6, 7, 8, 8, 9,10,11,12,13,14,16,16,16,16, +/* FD=3 */ + 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 6, 6, 7, + 8 , 8, 9,10,11,12,13,14,16,17,19,20,22,22,22,22 +}; + + +/* OPN key frequency number -> key code follow table */ +/* fnum higher 4bit -> keycode lower 2bit */ +static const UINT8 opn_fktable[16] = {0,0,0,0,0,0,0,1,2,3,3,3,3,3,3,3}; + + +/* 8 LFO speed parameters */ +/* each value represents number of samples that one LFO level will last for */ +static const UINT32 lfo_samples_per_step[8] = {108, 77, 71, 67, 62, 44, 8, 5}; + + + +/*There are 4 different LFO AM depths available, they are: + 0 dB, 1.4 dB, 5.9 dB, 11.8 dB + Here is how it is generated (in EG steps): + + 11.8 dB = 0, 2, 4, 6, 8, 10,12,14,16...126,126,124,122,120,118,....4,2,0 + 5.9 dB = 0, 1, 2, 3, 4, 5, 6, 7, 8....63, 63, 62, 61, 60, 59,.....2,1,0 + 1.4 dB = 0, 0, 0, 0, 1, 1, 1, 1, 2,...15, 15, 15, 15, 14, 14,.....0,0,0 + + (1.4 dB is losing precision as you can see) + + It's implemented as generator from 0..126 with step 2 then a shift + right N times, where N is: + 8 for 0 dB + 3 for 1.4 dB + 1 for 5.9 dB + 0 for 11.8 dB +*/ +static const UINT8 lfo_ams_depth_shift[4] = {8, 3, 1, 0}; + + + +/*There are 8 different LFO PM depths available, they are: + 0, 3.4, 6.7, 10, 14, 20, 40, 80 (cents) + + Modulation level at each depth depends on F-NUMBER bits: 4,5,6,7,8,9,10 + (bits 8,9,10 = FNUM MSB from OCT/FNUM register) + + Here we store only first quarter (positive one) of full waveform. + Full table (lfo_pm_table) containing all 128 waveforms is build + at run (init) time. + + One value in table below represents 4 (four) basic LFO steps + (1 PM step = 4 AM steps). + + For example: + at LFO SPEED=0 (which is 108 samples per basic LFO step) + one value from "lfo_pm_output" table lasts for 432 consecutive + samples (4*108=432) and one full LFO waveform cycle lasts for 13824 + samples (32*432=13824; 32 because we store only a quarter of whole + waveform in the table below) +*/ +static const UINT8 lfo_pm_output[7*8][8]={ /* 7 bits meaningful (of F-NUMBER), 8 LFO output levels per one depth (out of 32), 8 LFO depths */ +/* FNUM BIT 4: 000 0001xxxx */ +/* DEPTH 0 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 1 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 2 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 3 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 4 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 5 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 6 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 7 */ {0, 0, 0, 0, 1, 1, 1, 1}, + +/* FNUM BIT 5: 000 0010xxxx */ +/* DEPTH 0 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 1 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 2 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 3 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 4 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 5 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 6 */ {0, 0, 0, 0, 1, 1, 1, 1}, +/* DEPTH 7 */ {0, 0, 1, 1, 2, 2, 2, 3}, + +/* FNUM BIT 6: 000 0100xxxx */ +/* DEPTH 0 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 1 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 2 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 3 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 4 */ {0, 0, 0, 0, 0, 0, 0, 1}, +/* DEPTH 5 */ {0, 0, 0, 0, 1, 1, 1, 1}, +/* DEPTH 6 */ {0, 0, 1, 1, 2, 2, 2, 3}, +/* DEPTH 7 */ {0, 0, 2, 3, 4, 4, 5, 6}, + +/* FNUM BIT 7: 000 1000xxxx */ +/* DEPTH 0 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 1 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 2 */ {0, 0, 0, 0, 0, 0, 1, 1}, +/* DEPTH 3 */ {0, 0, 0, 0, 1, 1, 1, 1}, +/* DEPTH 4 */ {0, 0, 0, 1, 1, 1, 1, 2}, +/* DEPTH 5 */ {0, 0, 1, 1, 2, 2, 2, 3}, +/* DEPTH 6 */ {0, 0, 2, 3, 4, 4, 5, 6}, +/* DEPTH 7 */ {0, 0, 4, 6, 8, 8, 0xa, 0xc}, + +/* FNUM BIT 8: 001 0000xxxx */ +/* DEPTH 0 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 1 */ {0, 0, 0, 0, 1, 1, 1, 1}, +/* DEPTH 2 */ {0, 0, 0, 1, 1, 1, 2, 2}, +/* DEPTH 3 */ {0, 0, 1, 1, 2, 2, 3, 3}, +/* DEPTH 4 */ {0, 0, 1, 2, 2, 2, 3, 4}, +/* DEPTH 5 */ {0, 0, 2, 3, 4, 4, 5, 6}, +/* DEPTH 6 */ {0, 0, 4, 6, 8, 8, 0xa, 0xc}, +/* DEPTH 7 */ {0, 0, 8, 0xc,0x10,0x10,0x14,0x18}, + +/* FNUM BIT 9: 010 0000xxxx */ +/* DEPTH 0 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 1 */ {0, 0, 0, 0, 2, 2, 2, 2}, +/* DEPTH 2 */ {0, 0, 0, 2, 2, 2, 4, 4}, +/* DEPTH 3 */ {0, 0, 2, 2, 4, 4, 6, 6}, +/* DEPTH 4 */ {0, 0, 2, 4, 4, 4, 6, 8}, +/* DEPTH 5 */ {0, 0, 4, 6, 8, 8, 0xa, 0xc}, +/* DEPTH 6 */ {0, 0, 8, 0xc,0x10,0x10,0x14,0x18}, +/* DEPTH 7 */ {0, 0,0x10,0x18,0x20,0x20,0x28,0x30}, + +/* FNUM BIT10: 100 0000xxxx */ +/* DEPTH 0 */ {0, 0, 0, 0, 0, 0, 0, 0}, +/* DEPTH 1 */ {0, 0, 0, 0, 4, 4, 4, 4}, +/* DEPTH 2 */ {0, 0, 0, 4, 4, 4, 8, 8}, +/* DEPTH 3 */ {0, 0, 4, 4, 8, 8, 0xc, 0xc}, +/* DEPTH 4 */ {0, 0, 4, 8, 8, 8, 0xc,0x10}, +/* DEPTH 5 */ {0, 0, 8, 0xc,0x10,0x10,0x14,0x18}, +/* DEPTH 6 */ {0, 0,0x10,0x18,0x20,0x20,0x28,0x30}, +/* DEPTH 7 */ {0, 0,0x20,0x30,0x40,0x40,0x50,0x60}, + +}; + +/* all 128 LFO PM waveforms */ +static INT32 lfo_pm_table[128*8*32]; /* 128 combinations of 7 bits meaningful (of F-NUMBER), 8 LFO depths, 32 LFO output levels per one depth */ + +/* register number to channel number , slot offset */ +#define OPN_CHAN(N) (N&3) +#define OPN_SLOT(N) ((N>>2)&3) + +/* slot number */ +#define SLOT1 0 +#define SLOT2 2 +#define SLOT3 1 +#define SLOT4 3 + +/* bit0 = Right enable , bit1 = Left enable */ +#define OUTD_RIGHT 1 +#define OUTD_LEFT 2 +#define OUTD_CENTER 3 + + +/* save output as raw 16-bit sample */ +/* #define SAVE_SAMPLE */ + +#ifdef SAVE_SAMPLE +static FILE *sample[1]; + #if 1 /*save to MONO file */ + #define SAVE_ALL_CHANNELS \ + { signed int pom = lt; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + } + #else /*save to STEREO file */ + #define SAVE_ALL_CHANNELS \ + { signed int pom = lt; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + pom = rt; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + } + #endif +#endif + + +/* struct describing a single operator (SLOT) */ +struct fm2612_FM_SLOT +{ + INT32 *DT; /* detune :dt_tab[DT] */ + UINT8 KSR; /* key scale rate :3-KSR */ + UINT32 ar; /* attack rate */ + UINT32 d1r; /* decay rate */ + UINT32 d2r; /* sustain rate */ + UINT32 rr; /* release rate */ + UINT8 ksr; /* key scale rate :kcode>>(3-KSR) */ + UINT32 mul; /* multiple :ML_TABLE[ML] */ + + /* Phase Generator */ + UINT32 phase; /* phase counter */ + INT32 Incr; /* phase step */ + + /* Envelope Generator */ + UINT8 state; /* phase type */ + UINT32 tl; /* total level: TL << 3 */ + INT32 volume; /* envelope counter */ + UINT32 sl; /* sustain level:sl_table[SL] */ + UINT32 vol_out; /* current output from EG circuit (without AM from LFO) */ + + UINT8 eg_sh_ar; /* (attack state) */ + UINT8 eg_sel_ar; /* (attack state) */ + UINT8 eg_sh_d1r; /* (decay state) */ + UINT8 eg_sel_d1r; /* (decay state) */ + UINT8 eg_sh_d2r; /* (sustain state) */ + UINT8 eg_sel_d2r; /* (sustain state) */ + UINT8 eg_sh_rr; /* (release state) */ + UINT8 eg_sel_rr; /* (release state) */ + + UINT8 ssg; /* SSG-EG waveform */ + UINT8 ssgn; /* SSG-EG negated output */ + + UINT8 key; /* 0=last key was KEY OFF, 1=KEY ON */ + + /* LFO */ + UINT32 AMmask; /* AM enable flag */ + +}; + +struct fm2612_FM_CH +{ + fm2612_FM_SLOT SLOT[4]; /* four SLOTs (operators) */ + + UINT8 ALGO; /* algorithm */ + UINT8 FB; /* feedback shift */ + INT32 op1_out[2]; /* op1 output for feedback */ + + INT32 *connect1; /* SLOT1 output pointer */ + INT32 *connect3; /* SLOT3 output pointer */ + INT32 *connect2; /* SLOT2 output pointer */ + INT32 *connect4; /* SLOT4 output pointer */ + + INT32 *mem_connect;/* where to put the delayed sample (MEM) */ + INT32 mem_value; /* delayed sample (MEM) value */ + + INT32 pms; /* channel PMS */ + UINT8 ams; /* channel AMS */ + + UINT32 fc; /* fnum,blk:adjusted to sample rate */ + UINT8 kcode; /* key code: */ + UINT32 block_fnum; /* current blk/fnum value for this slot (can be different betweeen slots of one channel in 3slot mode) */ +}; + + +struct fm2612_FM_ST +{ + device_t *device; + void * param; /* this chip parameter */ + double freqbase; /* frequency base */ + int timer_prescaler; /* timer prescaler */ + UINT8 irq; /* interrupt level */ + UINT8 irqmask; /* irq mask */ +#if FM_BUSY_FLAG_SUPPORT + TIME_TYPE busy_expiry_time; /* expiry time of the busy status */ +#endif + UINT32 clock; /* master clock (Hz) */ + UINT32 rate; /* sampling rate (Hz) */ + UINT16 address; /* address register */ + UINT8 status; /* status flag */ + UINT32 mode; /* mode CSM / 3SLOT */ + UINT8 fn_h; /* freq latch */ + UINT8 prescaler_sel; /* prescaler selector */ + INT32 TA; /* timer a */ + INT32 TAC; /* timer a counter */ + UINT8 TB; /* timer b */ + INT32 TBC; /* timer b counter */ + /* local time tables */ + INT32 dt_tab[8][32]; /* DeTune table */ + /* Extention Timer and IRQ handler */ + FM_TIMERHANDLER timer_handler; + FM_IRQHANDLER IRQ_Handler; + const ssg_callbacks *SSG; +}; + + + +/***********************************************************/ +/* OPN unit */ +/***********************************************************/ + +/* OPN 3slot struct */ +struct fm2612_FM_3SLOT +{ + UINT32 fc[3]; /* fnum3,blk3: calculated */ + UINT8 fn_h; /* freq3 latch */ + UINT8 kcode[3]; /* key code */ + UINT32 block_fnum[3]; /* current fnum value for this slot (can be different betweeen slots of one channel in 3slot mode) */ + UINT8 key_csm; /* CSM mode Key-ON flag */ +}; + +/* OPN/A/B common state */ +struct fm2612_FM_OPN +{ + UINT8 type; /* chip type */ + fm2612_FM_ST ST; /* general state */ + fm2612_FM_3SLOT SL3; /* 3 slot mode state */ + fm2612_FM_CH *P_CH; /* pointer of CH */ + unsigned int pan[6*2]; /* fm channels output masks (0xffffffff = enable) */ + + UINT32 eg_cnt; /* global envelope generator counter */ + UINT32 eg_timer; /* global envelope generator counter works at frequency = chipclock/144/3 */ + UINT32 eg_timer_add; /* step of eg_timer */ + UINT32 eg_timer_overflow;/* envelope generator timer overlfows every 3 samples (on real chip) */ + + + /* there are 2048 FNUMs that can be generated using FNUM/BLK registers + but LFO works with one more bit of a precision so we really need 4096 elements */ + UINT32 fn_table[4096]; /* fnumber->increment counter */ + UINT32 fn_max; /* maximal phase increment (used for phase overflow) */ + + /* LFO */ + UINT8 lfo_cnt; /* current LFO phase (out of 128) */ + UINT32 lfo_timer; /* current LFO phase runs at LFO frequency */ + UINT32 lfo_timer_add; /* step of lfo_timer */ + UINT32 lfo_timer_overflow; /* LFO timer overflows every N samples (depends on LFO frequency) */ + UINT32 LFO_AM; /* current LFO AM step */ + UINT32 LFO_PM; /* current LFO PM step */ + + INT32 m2,c1,c2; /* Phase Modulation input for operators 2,3,4 */ + INT32 mem; /* one sample delay memory */ + INT32 out_fm[8]; /* outputs of working channels */ + +}; + +/* here's the virtual YM2612 */ +struct YM2612 +{ + UINT8 REGS[512]; /* registers */ + fm2612_FM_OPN OPN; /* OPN state */ + fm2612_FM_CH CH[6]; /* channel state */ + UINT8 addr_A1; /* address line A1 */ + + /* dac output (YM2612) */ + int dacen; + INT32 dacout; + device_t *device; +}; + +/* log output level */ +#define LOG_ERR 3 /* ERROR */ +#define LOG_WAR 2 /* WARNING */ +#define LOG_INF 1 /* INFORMATION */ +#define LOG_LEVEL LOG_INF + +#ifndef __RAINE__ +#define LOG(d,n,x) do { if( (n)>=LOG_LEVEL ) d->logerror x; } while (0) +#endif + +/* limitter */ +#define Limit(val, max,min) { \ + if ( val > max ) val = max; \ + else if ( val < min ) val = min; \ +} + + +/* status set and IRQ handling */ +INLINE void FM_STATUS_SET(fm2612_FM_ST *ST,int flag) +{ + /* set status flag */ + ST->status |= flag; + if ( !(ST->irq) && (ST->status & ST->irqmask) ) + { + ST->irq = 1; + /* callback user interrupt handler (IRQ is OFF to ON) */ + if(ST->IRQ_Handler) (ST->IRQ_Handler)(ST->param,1); + } +} + +/* status reset and IRQ handling */ +INLINE void FM_STATUS_RESET(fm2612_FM_ST *ST,int flag) +{ + /* reset status flag */ + ST->status &=~flag; + if ( (ST->irq) && !(ST->status & ST->irqmask) ) + { + ST->irq = 0; + /* callback user interrupt handler (IRQ is ON to OFF) */ + if(ST->IRQ_Handler) (ST->IRQ_Handler)(ST->param,0); + } +} + +/* IRQ mask set */ +INLINE void FM_IRQMASK_SET(fm2612_FM_ST *ST,int flag) +{ + ST->irqmask = flag; + /* IRQ handling check */ + FM_STATUS_SET(ST,0); + FM_STATUS_RESET(ST,0); +} + +INLINE void FM_KEYON(fm2612_FM_OPN *OPN, fm2612_FM_CH *CH , int s ) +{ + fm2612_FM_SLOT *SLOT = &CH->SLOT[s]; + + if( !SLOT->key && !OPN->SL3.key_csm) + { + /* restart Phase Generator */ + SLOT->phase = 0; + + /* reset SSG-EG inversion flag */ + SLOT->ssgn = 0; + + if ((SLOT->ar + SLOT->ksr) < 94 /*32+62*/) + { + SLOT->state = (SLOT->volume <= MIN_ATT_INDEX) ? ((SLOT->sl == MIN_ATT_INDEX) ? EG_SUS : EG_DEC) : EG_ATT; + } + else + { + /* force attenuation level to 0 */ + SLOT->volume = MIN_ATT_INDEX; + + /* directly switch to Decay (or Sustain) */ + SLOT->state = (SLOT->sl == MIN_ATT_INDEX) ? EG_SUS : EG_DEC; + } + + /* recalculate EG output */ + if ((SLOT->ssg&0x08) && (SLOT->ssgn ^ (SLOT->ssg&0x04))) + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + + SLOT->key = 1; +} + +INLINE void FM_KEYOFF(fm2612_FM_OPN *OPN, fm2612_FM_CH *CH , int s ) +{ + fm2612_FM_SLOT *SLOT = &CH->SLOT[s]; + + if (SLOT->key && !OPN->SL3.key_csm) + { + if (SLOT->state>EG_REL) + { + SLOT->state = EG_REL; /* phase -> Release */ + + /* SSG-EG specific update */ + if (SLOT->ssg&0x08) + { + /* convert EG attenuation level */ + if (SLOT->ssgn ^ (SLOT->ssg&0x04)) + SLOT->volume = (0x200 - SLOT->volume); + + /* force EG attenuation level */ + if (SLOT->volume >= 0x200) + { + SLOT->volume = MAX_ATT_INDEX; + SLOT->state = EG_OFF; + } + + /* recalculate EG output */ + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + } + } + + SLOT->key = 0; +} + +INLINE void FM_KEYON_CSM(fm2612_FM_OPN *OPN, fm2612_FM_CH *CH , int s ) +{ + fm2612_FM_SLOT *SLOT = &CH->SLOT[s]; + + if( !SLOT->key && !OPN->SL3.key_csm) + { + /* restart Phase Generator */ + SLOT->phase = 0; + + /* reset SSG-EG inversion flag */ + SLOT->ssgn = 0; + + if ((SLOT->ar + SLOT->ksr) < 94 /*32+62*/) + { + SLOT->state = (SLOT->volume <= MIN_ATT_INDEX) ? ((SLOT->sl == MIN_ATT_INDEX) ? EG_SUS : EG_DEC) : EG_ATT; + } + else + { + /* force attenuation level to 0 */ + SLOT->volume = MIN_ATT_INDEX; + + /* directly switch to Decay (or Sustain) */ + SLOT->state = (SLOT->sl == MIN_ATT_INDEX) ? EG_SUS : EG_DEC; + } + + /* recalculate EG output */ + if ((SLOT->ssg&0x08) && (SLOT->ssgn ^ (SLOT->ssg&0x04))) + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } +} + +INLINE void FM_KEYOFF_CSM(fm2612_FM_CH *CH , int s ) +{ + fm2612_FM_SLOT *SLOT = &CH->SLOT[s]; + if (!SLOT->key) + { + if (SLOT->state>EG_REL) + { + SLOT->state = EG_REL; /* phase -> Release */ + + /* SSG-EG specific update */ + if (SLOT->ssg&0x08) + { + /* convert EG attenuation level */ + if (SLOT->ssgn ^ (SLOT->ssg&0x04)) + SLOT->volume = (0x200 - SLOT->volume); + + /* force EG attenuation level */ + if (SLOT->volume >= 0x200) + { + SLOT->volume = MAX_ATT_INDEX; + SLOT->state = EG_OFF; + } + + /* recalculate EG output */ + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + } + } +} + +/* OPN Mode Register Write */ +INLINE void set_timers(fm2612_FM_OPN *OPN, fm2612_FM_ST *ST, void *n, int v) +{ + /* b7 = CSM MODE */ + /* b6 = 3 slot mode */ + /* b5 = reset b */ + /* b4 = reset a */ + /* b3 = timer enable b */ + /* b2 = timer enable a */ + /* b1 = load b */ + /* b0 = load a */ + + if ((OPN->ST.mode ^ v) & 0xC0) + { + /* phase increment need to be recalculated */ + OPN->P_CH[2].SLOT[SLOT1].Incr=-1; + + /* CSM mode disabled and CSM key ON active*/ + if (((v & 0xC0) != 0x80) && OPN->SL3.key_csm) + { + /* CSM Mode Key OFF (verified by Nemesis on real hardware) */ + FM_KEYOFF_CSM(&OPN->P_CH[2],SLOT1); + FM_KEYOFF_CSM(&OPN->P_CH[2],SLOT2); + FM_KEYOFF_CSM(&OPN->P_CH[2],SLOT3); + FM_KEYOFF_CSM(&OPN->P_CH[2],SLOT4); + OPN->SL3.key_csm = 0; + } + } + + /* reload Timers */ + if ((v&1) && !(ST->mode&1)) + { + ST->TAC = (1024-ST->TA); + /* External timer handler */ + if (ST->timer_handler) (ST->timer_handler)(n,0,ST->TAC * ST->timer_prescaler,ST->clock); + } + else if (!(v & 1)) + { + if( ST->TAC != 0 ) + { + ST->TAC = 0; + if (ST->timer_handler) (ST->timer_handler)(n,0,0,ST->clock); + } + } + + if ((v&2) && !(ST->mode&2)) + { + ST->TBC = ( 256-ST->TB)<<4; + /* External timer handler */ + if (ST->timer_handler) (ST->timer_handler)(n,1,ST->TBC * ST->timer_prescaler,ST->clock); + } + else if (!(v & 2)) + { + if( ST->TBC != 0 ) + { + ST->TBC = 0; + if (ST->timer_handler) (ST->timer_handler)(n,1,0,ST->clock); + } + } + + /* reset Timers flags */ + ST->status &= (~v >> 4); + + /* if IRQ should be lowered now, do so */ + if ( (ST->irq) && !(ST->status & ST->irqmask) ) + { + ST->irq = 0; + /* callback user interrupt handler (IRQ is ON to OFF) */ + if(ST->IRQ_Handler) (ST->IRQ_Handler)(ST->param, 0); + } + ST->mode = v; +} + + +/* Timer A Overflow */ +INLINE void TimerAOver(fm2612_FM_ST *ST) +{ + /* set status (if enabled) */ + if(ST->mode & 0x04) FM_STATUS_SET(ST,0x01); + /* clear or reload the counter */ + ST->TAC = (1024-ST->TA); + if (ST->timer_handler) (ST->timer_handler)(ST->param,0,ST->TAC * ST->timer_prescaler,ST->clock); +} +/* Timer B Overflow */ +INLINE void TimerBOver(fm2612_FM_ST *ST) +{ + /* set status (if enabled) */ + if(ST->mode & 0x08) FM_STATUS_SET(ST,0x02); + /* clear or reload the counter */ + ST->TBC = ( 256-ST->TB)<<4; + if (ST->timer_handler) (ST->timer_handler)(ST->param,1,ST->TBC * ST->timer_prescaler,ST->clock); +} + + +#if FM_INTERNAL_TIMER +/* ----- internal timer mode , update timer */ + +/* ---------- calculate timer A ---------- */ + #define INTERNAL_TIMER_A(ST,CSM_CH) \ + { \ + if( ST->TAC && (ST->timer_handler==0) ) \ + if( (ST->TAC -= (int)(ST->freqbase*4096)) <= 0 ) \ + { \ + TimerAOver( ST ); \ + /* CSM mode total level latch and auto key on */ \ + if( ST->mode & 0x80 ) \ + CSMKeyControll( CSM_CH ); \ + } \ + } +/* ---------- calculate timer B ---------- */ + #define INTERNAL_TIMER_B(ST,step) \ + { \ + if( ST->TBC && (ST->timer_handler==0) ) \ + if( (ST->TBC -= (int)(ST->freqbase*4096*step)) <= 0 ) \ + TimerBOver( ST ); \ + } +#else /* FM_INTERNAL_TIMER */ +/* external timer mode */ +#define INTERNAL_TIMER_A(ST,CSM_CH) +#define INTERNAL_TIMER_B(ST,step) +#endif /* FM_INTERNAL_TIMER */ + + + +#if FM_BUSY_FLAG_SUPPORT +#define FM_BUSY_CLEAR(ST) ((ST)->busy_expiry_time = UNDEFINED_TIME) +INLINE UINT8 FM_STATUS_FLAG(fm2612_FM_ST *ST) +{ + if( COMPARE_TIMES(ST->busy_expiry_time, UNDEFINED_TIME) != 0 ) + { + if (COMPARE_TIMES(ST->busy_expiry_time, FM_GET_TIME_NOW(&ST->device->machine())) > 0) + return ST->status | 0x80; /* with busy */ + /* expire */ + FM_BUSY_CLEAR(ST); + } + return ST->status; +} +#if 0 +INLINE void FM_BUSY_SET(fm2612_FM_ST *ST,int busyclock ) +{ + TIME_TYPE expiry_period = MULTIPLY_TIME_BY_INT(attotime::from_hz(ST->clock), busyclock * ST->timer_prescaler); + ST->busy_expiry_time = ADD_TIMES(FM_GET_TIME_NOW(&ST->device->machine()), expiry_period); +} +#endif +#else +#define FM_STATUS_FLAG(ST) ((ST)->status) +#define FM_BUSY_SET(ST,bclock) {} +#define FM_BUSY_CLEAR(ST) {} +#endif + + +/* set algorithm connection */ +static void setup_connection(fm2612_FM_OPN *OPN, fm2612_FM_CH *CH, int ch) +{ + INT32 *carrier = &OPN->out_fm[ch]; + + INT32 **om1 = &CH->connect1; + INT32 **om2 = &CH->connect3; + INT32 **oc1 = &CH->connect2; + + INT32 **memc = &CH->mem_connect; + + switch( CH->ALGO ) + { + case 0: + /* M1---C1---MEM---M2---C2---OUT */ + *om1 = &OPN->c1; + *oc1 = &OPN->mem; + *om2 = &OPN->c2; + *memc= &OPN->m2; + break; + case 1: + /* M1------+-MEM---M2---C2---OUT */ + /* C1-+ */ + *om1 = &OPN->mem; + *oc1 = &OPN->mem; + *om2 = &OPN->c2; + *memc= &OPN->m2; + break; + case 2: + /* M1-----------------+-C2---OUT */ + /* C1---MEM---M2-+ */ + *om1 = &OPN->c2; + *oc1 = &OPN->mem; + *om2 = &OPN->c2; + *memc= &OPN->m2; + break; + case 3: + /* M1---C1---MEM------+-C2---OUT */ + /* M2-+ */ + *om1 = &OPN->c1; + *oc1 = &OPN->mem; + *om2 = &OPN->c2; + *memc= &OPN->c2; + break; + case 4: + /* M1---C1-+-OUT */ + /* M2---C2-+ */ + /* MEM: not used */ + *om1 = &OPN->c1; + *oc1 = carrier; + *om2 = &OPN->c2; + *memc= &OPN->mem; /* store it anywhere where it will not be used */ + break; + case 5: + /* +----C1----+ */ + /* M1-+-MEM---M2-+-OUT */ + /* +----C2----+ */ + *om1 = 0; /* special mark */ + *oc1 = carrier; + *om2 = carrier; + *memc= &OPN->m2; + break; + case 6: + /* M1---C1-+ */ + /* M2-+-OUT */ + /* C2-+ */ + /* MEM: not used */ + *om1 = &OPN->c1; + *oc1 = carrier; + *om2 = carrier; + *memc= &OPN->mem; /* store it anywhere where it will not be used */ + break; + case 7: + /* M1-+ */ + /* C1-+-OUT */ + /* M2-+ */ + /* C2-+ */ + /* MEM: not used*/ + *om1 = carrier; + *oc1 = carrier; + *om2 = carrier; + *memc= &OPN->mem; /* store it anywhere where it will not be used */ + break; + } + + CH->connect4 = carrier; +} + +/* set detune & multiple */ +INLINE void set_det_mul(fm2612_FM_ST *ST,fm2612_FM_CH *CH,fm2612_FM_SLOT *SLOT,int v) +{ + SLOT->mul = (v&0x0f)? (v&0x0f)*2 : 1; + SLOT->DT = ST->dt_tab[(v>>4)&7]; + CH->SLOT[SLOT1].Incr=-1; +} + +/* set total level */ +INLINE void set_tl(fm2612_FM_CH *CH,fm2612_FM_SLOT *SLOT , int v) +{ + SLOT->tl = (v&0x7f)<<(ENV_BITS-7); /* 7bit TL */ + + /* recalculate EG output */ + if ((SLOT->ssg&0x08) && (SLOT->ssgn ^ (SLOT->ssg&0x04)) && (SLOT->state > EG_REL)) + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; +} + +/* set attack rate & key scale */ +INLINE void set_ar_ksr(UINT8 type, fm2612_FM_CH *CH,fm2612_FM_SLOT *SLOT,int v) +{ + UINT8 old_KSR = SLOT->KSR; + + SLOT->ar = (v&0x1f) ? 32 + ((v&0x1f)<<1) : 0; + + SLOT->KSR = 3-(v>>6); + if (SLOT->KSR != old_KSR) + { + CH->SLOT[SLOT1].Incr=-1; + } + + /* Even if it seems unnecessary, in some odd case, KSR and KC are modified */ + /* and could result in SLOT->kc remaining unchanged. */ + /* In such case, AR values would not be recalculated despite SLOT->ar has changed */ + /* This actually fixes the intro of "The Adventures of Batman & Robin" (Eke-Eke) */ + if ((SLOT->ar + SLOT->ksr) < 94 /*32+62*/) + { + SLOT->eg_sh_ar = eg_rate_shift [SLOT->ar + SLOT->ksr ]; + SLOT->eg_sel_ar = eg_rate_select2612[SLOT->ar + SLOT->ksr ]; + } + else + { + SLOT->eg_sh_ar = 0; + SLOT->eg_sel_ar = 18*RATE_STEPS; /* verified by Nemesis on real hardware */ + } +} + +/* set decay rate */ +INLINE void set_dr(UINT8 type, fm2612_FM_SLOT *SLOT,int v) +{ + SLOT->d1r = (v&0x1f) ? 32 + ((v&0x1f)<<1) : 0; + + SLOT->eg_sh_d1r = eg_rate_shift [SLOT->d1r + SLOT->ksr]; + SLOT->eg_sel_d1r= eg_rate_select2612[SLOT->d1r + SLOT->ksr]; +} + +/* set sustain rate */ +INLINE void set_sr(UINT8 type, fm2612_FM_SLOT *SLOT,int v) +{ + SLOT->d2r = (v&0x1f) ? 32 + ((v&0x1f)<<1) : 0; + + SLOT->eg_sh_d2r = eg_rate_shift [SLOT->d2r + SLOT->ksr]; + SLOT->eg_sel_d2r= eg_rate_select2612[SLOT->d2r + SLOT->ksr]; +} + +/* set release rate */ +INLINE void set_sl_rr(UINT8 type, fm2612_FM_SLOT *SLOT,int v) +{ + SLOT->sl = sl_table[ v>>4 ]; + + /* check EG state changes */ + if ((SLOT->state == EG_DEC) && (SLOT->volume >= (INT32)(SLOT->sl))) + SLOT->state = EG_SUS; + + SLOT->rr = 34 + ((v&0x0f)<<2); + + SLOT->eg_sh_rr = eg_rate_shift [SLOT->rr + SLOT->ksr]; + SLOT->eg_sel_rr = eg_rate_select2612[SLOT->rr + SLOT->ksr]; +} + +/* advance LFO to next sample */ +INLINE void advance_lfo(fm2612_FM_OPN *OPN) +{ + if (OPN->lfo_timer_overflow) /* LFO enabled ? */ + { + /* increment LFO timer */ + OPN->lfo_timer += OPN->lfo_timer_add; + + /* when LFO is enabled, one level will last for 108, 77, 71, 67, 62, 44, 8 or 5 samples */ + while (OPN->lfo_timer >= OPN->lfo_timer_overflow) + { + OPN->lfo_timer -= OPN->lfo_timer_overflow; + + /* There are 128 LFO steps */ + OPN->lfo_cnt = ( OPN->lfo_cnt + 1 ) & 127; + + /* triangle (inverted) */ + /* AM: from 126 to 0 step -2, 0 to 126 step +2 */ + if (OPN->lfo_cnt<64) + OPN->LFO_AM = (OPN->lfo_cnt ^ 63) << 1; + else + OPN->LFO_AM = (OPN->lfo_cnt & 63) << 1; + + /* PM works with 4 times slower clock */ + OPN->LFO_PM = OPN->lfo_cnt >> 2; + } + } +} + +/* changed from INLINE to static here to work around gcc 4.2.1 codegen bug */ +static void advance_eg_channel(fm2612_FM_OPN *OPN, fm2612_FM_SLOT *SLOT) +{ + unsigned int out; + unsigned int i = 4; /* four operators per channel */ + + do + { + switch(SLOT->state) + { + case EG_ATT: /* attack phase */ + if (!(OPN->eg_cnt & ((1<<SLOT->eg_sh_ar)-1))) + { + /* update attenuation level */ + SLOT->volume += (~SLOT->volume * (eg_inc[SLOT->eg_sel_ar + ((OPN->eg_cnt>>SLOT->eg_sh_ar)&7)]))>>4; + + /* check phase transition*/ + if (SLOT->volume <= MIN_ATT_INDEX) + { + SLOT->volume = MIN_ATT_INDEX; + SLOT->state = (SLOT->sl == MIN_ATT_INDEX) ? EG_SUS : EG_DEC; /* special case where SL=0 */ + } + + /* recalculate EG output */ + if ((SLOT->ssg&0x08) && (SLOT->ssgn ^ (SLOT->ssg&0x04))) /* SSG-EG Output Inversion */ + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + break; + + case EG_DEC: /* decay phase */ + if (!(OPN->eg_cnt & ((1<<SLOT->eg_sh_d1r)-1))) + { + /* SSG EG type */ + if (SLOT->ssg&0x08) + { + /* update attenuation level */ + if (SLOT->volume < 0x200) + { + SLOT->volume += 4 * eg_inc[SLOT->eg_sel_d1r + ((OPN->eg_cnt>>SLOT->eg_sh_d1r)&7)]; + + /* recalculate EG output */ + if (SLOT->ssgn ^ (SLOT->ssg&0x04)) /* SSG-EG Output Inversion */ + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + + } + else + { + /* update attenuation level */ + SLOT->volume += eg_inc[SLOT->eg_sel_d1r + ((OPN->eg_cnt>>SLOT->eg_sh_d1r)&7)]; + + /* recalculate EG output */ + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + + /* check phase transition*/ + if (SLOT->volume >= (INT32)(SLOT->sl)) + SLOT->state = EG_SUS; + } + break; + + case EG_SUS: /* sustain phase */ + if (!(OPN->eg_cnt & ((1<<SLOT->eg_sh_d2r)-1))) + { + /* SSG EG type */ + if (SLOT->ssg&0x08) + { + /* update attenuation level */ + if (SLOT->volume < 0x200) + { + SLOT->volume += 4 * eg_inc[SLOT->eg_sel_d2r + ((OPN->eg_cnt>>SLOT->eg_sh_d2r)&7)]; + + /* recalculate EG output */ + if (SLOT->ssgn ^ (SLOT->ssg&0x04)) /* SSG-EG Output Inversion */ + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + } + else + { + /* update attenuation level */ + SLOT->volume += eg_inc[SLOT->eg_sel_d2r + ((OPN->eg_cnt>>SLOT->eg_sh_d2r)&7)]; + + /* check phase transition*/ + if ( SLOT->volume >= MAX_ATT_INDEX ) + SLOT->volume = MAX_ATT_INDEX; + /* do not change SLOT->state (verified on real chip) */ + + /* recalculate EG output */ + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + } + break; + + case EG_REL: /* release phase */ + if (!(OPN->eg_cnt & ((1<<SLOT->eg_sh_rr)-1))) + { + /* SSG EG type */ + if (SLOT->ssg&0x08) + { + /* update attenuation level */ + if (SLOT->volume < 0x200) + SLOT->volume += 4 * eg_inc[SLOT->eg_sel_rr + ((OPN->eg_cnt>>SLOT->eg_sh_rr)&7)]; + /* check phase transition */ + if (SLOT->volume >= 0x200) + { + SLOT->volume = MAX_ATT_INDEX; + SLOT->state = EG_OFF; + } + } + else + { + /* update attenuation level */ + SLOT->volume += eg_inc[SLOT->eg_sel_rr + ((OPN->eg_cnt>>SLOT->eg_sh_rr)&7)]; + + /* check phase transition*/ + if (SLOT->volume >= MAX_ATT_INDEX) + { + SLOT->volume = MAX_ATT_INDEX; + SLOT->state = EG_OFF; + } + } + + /* recalculate EG output */ + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + + } + break; + } + + out = ((UINT32)SLOT->volume); + + /* negate output (changes come from alternate bit, init comes from attack bit) */ + if ((SLOT->ssg&0x08) && (SLOT->ssgn&2) && (SLOT->state > EG_REL)) + out ^= MAX_ATT_INDEX; + + /* we need to store the result here because we are going to change ssgn + in next instruction */ + SLOT->vol_out = out + SLOT->tl; + + SLOT++; + i--; + }while (i); + +} + +/* SSG-EG update process */ +/* The behavior is based upon Nemesis tests on real hardware */ +/* This is actually executed before each samples */ +static void update_ssg_eg_channel(fm2612_FM_SLOT *SLOT) +{ + unsigned int i = 4; /* four operators per channel */ + + do + { + /* detect SSG-EG transition */ + /* this is not required during release phase as the attenuation has been forced to MAX and output invert flag is not used */ + /* if an Attack Phase is programmed, inversion can occur on each sample */ + if ((SLOT->ssg & 0x08) && (SLOT->volume >= 0x200) && (SLOT->state > EG_REL)) + { + if (SLOT->ssg & 0x01) /* bit 0 = hold SSG-EG */ + { + /* set inversion flag */ + if (SLOT->ssg & 0x02) + SLOT->ssgn = 4; + + /* force attenuation level during decay phases */ + if ((SLOT->state != EG_ATT) && !(SLOT->ssgn ^ (SLOT->ssg & 0x04))) + SLOT->volume = MAX_ATT_INDEX; + } + else /* loop SSG-EG */ + { + /* toggle output inversion flag or reset Phase Generator */ + if (SLOT->ssg & 0x02) + SLOT->ssgn ^= 4; + else + SLOT->phase = 0; + + /* same as Key ON */ + if (SLOT->state != EG_ATT) + { + if ((SLOT->ar + SLOT->ksr) < 94 /*32+62*/) + { + SLOT->state = (SLOT->volume <= MIN_ATT_INDEX) ? ((SLOT->sl == MIN_ATT_INDEX) ? EG_SUS : EG_DEC) : EG_ATT; + } + else + { + /* Attack Rate is maximal: directly switch to Decay or Substain */ + SLOT->volume = MIN_ATT_INDEX; + SLOT->state = (SLOT->sl == MIN_ATT_INDEX) ? EG_SUS : EG_DEC; + } + } + } + + /* recalculate EG output */ + if (SLOT->ssgn ^ (SLOT->ssg&0x04)) + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + } + + /* next slot */ + SLOT++; + i--; + } while (i); +} + + +INLINE void update_phase_lfo_slot(fm2612_FM_OPN *OPN, fm2612_FM_SLOT *SLOT, INT32 pms, UINT32 block_fnum) +{ + UINT32 fnum_lfo = ((block_fnum & 0x7f0) >> 4) * 32 * 8; + INT32 lfo_fn_table_index_offset = lfo_pm_table[ fnum_lfo + pms + OPN->LFO_PM ]; + + block_fnum = block_fnum*2 + lfo_fn_table_index_offset; + + if (lfo_fn_table_index_offset) /* LFO phase modulation active */ + { + UINT8 blk = (block_fnum&0x7000) >> 12; + UINT32 fn = block_fnum & 0xfff; + + /* recalculate keyscale code */ + int kc = (blk<<2) | opn_fktable[(fn >> 7) & 0xf]; + + /* recalculate (frequency) phase increment counter */ + int fc = (OPN->fn_table[fn]>>(7-blk)) + SLOT->DT[kc]; + + /* (frequency) phase overflow (credits to Nemesis) */ + if (fc < 0) fc += OPN->fn_max; + + /* update phase */ + SLOT->phase += (fc * SLOT->mul) >> 1; + } + else /* LFO phase modulation = zero */ + { + SLOT->phase += SLOT->Incr; + } +} + +INLINE void update_phase_lfo_channel(fm2612_FM_OPN *OPN, fm2612_FM_CH *CH) +{ + UINT32 block_fnum = CH->block_fnum; + + UINT32 fnum_lfo = ((block_fnum & 0x7f0) >> 4) * 32 * 8; + INT32 lfo_fn_table_index_offset = lfo_pm_table[ fnum_lfo + CH->pms + OPN->LFO_PM ]; + + block_fnum = block_fnum*2 + lfo_fn_table_index_offset; + + if (lfo_fn_table_index_offset) /* LFO phase modulation active */ + { + UINT8 blk = (block_fnum&0x7000) >> 12; + UINT32 fn = block_fnum & 0xfff; + + /* recalculate keyscale code */ + int kc = (blk<<2) | opn_fktable[(fn >> 7) & 0xf]; + + /* recalculate (frequency) phase increment counter */ + int fc = (OPN->fn_table[fn]>>(7-blk)); + + /* (frequency) phase overflow (credits to Nemesis) */ + int finc = fc + CH->SLOT[SLOT1].DT[kc]; + if (finc < 0) finc += OPN->fn_max; + CH->SLOT[SLOT1].phase += (finc*CH->SLOT[SLOT1].mul) >> 1; + + finc = fc + CH->SLOT[SLOT2].DT[kc]; + if (finc < 0) finc += OPN->fn_max; + CH->SLOT[SLOT2].phase += (finc*CH->SLOT[SLOT2].mul) >> 1; + + finc = fc + CH->SLOT[SLOT3].DT[kc]; + if (finc < 0) finc += OPN->fn_max; + CH->SLOT[SLOT3].phase += (finc*CH->SLOT[SLOT3].mul) >> 1; + + finc = fc + CH->SLOT[SLOT4].DT[kc]; + if (finc < 0) finc += OPN->fn_max; + CH->SLOT[SLOT4].phase += (finc*CH->SLOT[SLOT4].mul) >> 1; + } + else /* LFO phase modulation = zero */ + { + CH->SLOT[SLOT1].phase += CH->SLOT[SLOT1].Incr; + CH->SLOT[SLOT2].phase += CH->SLOT[SLOT2].Incr; + CH->SLOT[SLOT3].phase += CH->SLOT[SLOT3].Incr; + CH->SLOT[SLOT4].phase += CH->SLOT[SLOT4].Incr; + } +} + +/* update phase increment and envelope generator */ +INLINE void refresh_fc_eg_slot(fm2612_FM_OPN *OPN, fm2612_FM_SLOT *SLOT , int fc , int kc ) +{ + int ksr = kc >> SLOT->KSR; + + fc += SLOT->DT[kc]; + + /* detects frequency overflow (credits to Nemesis) */ + if (fc < 0) fc += OPN->fn_max; + + /* (frequency) phase increment counter */ + SLOT->Incr = (fc * SLOT->mul) >> 1; + + if( SLOT->ksr != ksr ) + { + SLOT->ksr = ksr; + + /* calculate envelope generator rates */ + if ((SLOT->ar + SLOT->ksr) < 32+62) + { + SLOT->eg_sh_ar = eg_rate_shift [SLOT->ar + SLOT->ksr ]; + SLOT->eg_sel_ar = eg_rate_select2612[SLOT->ar + SLOT->ksr ]; + } + else + { + SLOT->eg_sh_ar = 0; + SLOT->eg_sel_ar = 18*RATE_STEPS; /* verified by Nemesis on real hardware (Attack phase is blocked) */ + } + + SLOT->eg_sh_d1r = eg_rate_shift [SLOT->d1r + SLOT->ksr]; + SLOT->eg_sh_d2r = eg_rate_shift [SLOT->d2r + SLOT->ksr]; + SLOT->eg_sh_rr = eg_rate_shift [SLOT->rr + SLOT->ksr]; + + SLOT->eg_sel_d1r= eg_rate_select2612[SLOT->d1r + SLOT->ksr]; + SLOT->eg_sel_d2r= eg_rate_select2612[SLOT->d2r + SLOT->ksr]; + SLOT->eg_sel_rr = eg_rate_select2612[SLOT->rr + SLOT->ksr]; + } +} + +/* update phase increment counters */ +/* Changed from INLINE to static to work around gcc 4.2.1 codegen bug */ +static void refresh_fc_eg_chan(fm2612_FM_OPN *OPN, fm2612_FM_CH *CH ) +{ + if( CH->SLOT[SLOT1].Incr==-1) + { + int fc = CH->fc; + int kc = CH->kcode; + refresh_fc_eg_slot(OPN, &CH->SLOT[SLOT1] , fc , kc ); + refresh_fc_eg_slot(OPN, &CH->SLOT[SLOT2] , fc , kc ); + refresh_fc_eg_slot(OPN, &CH->SLOT[SLOT3] , fc , kc ); + refresh_fc_eg_slot(OPN, &CH->SLOT[SLOT4] , fc , kc ); + } +} + +#define volume_calc(OP) ((OP)->vol_out + (AM & (OP)->AMmask)) + +INLINE signed int op_calc(UINT32 phase, unsigned int env, signed int pm) +{ + UINT32 p; + + p = (env<<3) + sin_tab[ ( ((signed int)((phase & ~FREQ_MASK) + (pm<<15))) >> FREQ_SH ) & SIN_MASK ]; + + if (p >= TL_TAB_LEN) + return 0; + return tl_tab[p]; +} + +INLINE signed int op_calc1(UINT32 phase, unsigned int env, signed int pm) +{ + UINT32 p; + + p = (env<<3) + sin_tab[ ( ((signed int)((phase & ~FREQ_MASK) + pm )) >> FREQ_SH ) & SIN_MASK ]; + + if (p >= TL_TAB_LEN) + return 0; + return tl_tab[p]; +} + +INLINE void chan_calc(YM2612 *F2612, fm2612_FM_OPN *OPN, fm2612_FM_CH *CH) +{ + UINT32 AM = OPN->LFO_AM >> CH->ams; + unsigned int eg_out = volume_calc(&CH->SLOT[SLOT1]); + + OPN->m2 = OPN->c1 = OPN->c2 = OPN->mem = 0; + + *CH->mem_connect = CH->mem_value; /* restore delayed sample (MEM) value to m2 or c2 */ + + { + INT32 out = CH->op1_out[0] + CH->op1_out[1]; + CH->op1_out[0] = CH->op1_out[1]; + + if( !CH->connect1 ) + { + /* algorithm 5 */ + OPN->mem = OPN->c1 = OPN->c2 = CH->op1_out[0]; + } + else + { + /* other algorithms */ + *CH->connect1 += CH->op1_out[0]; + } + + + CH->op1_out[1] = 0; + if( eg_out < ENV_QUIET ) /* SLOT 1 */ + { + if (!CH->FB) + out=0; + + CH->op1_out[1] = op_calc1(CH->SLOT[SLOT1].phase, eg_out, (out<<CH->FB) ); + } + } + + eg_out = volume_calc(&CH->SLOT[SLOT3]); + if( eg_out < ENV_QUIET ) /* SLOT 3 */ + *CH->connect3 += op_calc(CH->SLOT[SLOT3].phase, eg_out, OPN->m2); + + eg_out = volume_calc(&CH->SLOT[SLOT2]); + if( eg_out < ENV_QUIET ) /* SLOT 2 */ + *CH->connect2 += op_calc(CH->SLOT[SLOT2].phase, eg_out, OPN->c1); + + eg_out = volume_calc(&CH->SLOT[SLOT4]); + if( eg_out < ENV_QUIET ) /* SLOT 4 */ + *CH->connect4 += op_calc(CH->SLOT[SLOT4].phase, eg_out, OPN->c2); + + + /* store current MEM */ + CH->mem_value = OPN->mem; + + /* update phase counters AFTER output calculations */ + if(CH->pms) + { + /* add support for 3 slot mode */ + if ((OPN->ST.mode & 0xC0) && (CH == &F2612->CH[2])) + { + update_phase_lfo_slot(OPN, &CH->SLOT[SLOT1], CH->pms, OPN->SL3.block_fnum[1]); + update_phase_lfo_slot(OPN, &CH->SLOT[SLOT2], CH->pms, OPN->SL3.block_fnum[2]); + update_phase_lfo_slot(OPN, &CH->SLOT[SLOT3], CH->pms, OPN->SL3.block_fnum[0]); + update_phase_lfo_slot(OPN, &CH->SLOT[SLOT4], CH->pms, CH->block_fnum); + } + else update_phase_lfo_channel(OPN, CH); + } + else /* no LFO phase modulation */ + { + CH->SLOT[SLOT1].phase += CH->SLOT[SLOT1].Incr; + CH->SLOT[SLOT2].phase += CH->SLOT[SLOT2].Incr; + CH->SLOT[SLOT3].phase += CH->SLOT[SLOT3].Incr; + CH->SLOT[SLOT4].phase += CH->SLOT[SLOT4].Incr; + } +} + +static void FMCloseTable( void ) +{ +#ifdef SAVE_SAMPLE + fclose(sample[0]); +#endif + return; +} + + +/* CSM Key Controll */ +INLINE void CSMKeyControll(fm2612_FM_OPN *OPN, fm2612_FM_CH *CH) +{ + /* all key ON (verified by Nemesis on real hardware) */ + FM_KEYON_CSM(OPN,CH,SLOT1); + FM_KEYON_CSM(OPN,CH,SLOT2); + FM_KEYON_CSM(OPN,CH,SLOT3); + FM_KEYON_CSM(OPN,CH,SLOT4); + OPN->SL3.key_csm = 1; +} + +#ifdef __SAVE_H__ +/* FM channel save , internal state only */ +static void FMsave_state_channel(device_t *device,fm2612_FM_CH *CH,int num_ch) +{ + int slot , ch; + + for(ch=0;ch<num_ch;ch++,CH++) + { + /* channel */ + device->save_item(NAME(CH->op1_out), ch); + device->save_item(NAME(CH->fc), ch); + /* slots */ + for(slot=0;slot<4;slot++) + { + fm2612_FM_SLOT *SLOT = &CH->SLOT[slot]; + device->save_item(NAME(SLOT->phase), ch * 4 + slot); + device->save_item(NAME(SLOT->state), ch * 4 + slot); + device->save_item(NAME(SLOT->volume), ch * 4 + slot); + } + } +} + +static void FMsave_state_st(device_t *device,fm2612_FM_ST *ST) +{ +#if FM_BUSY_FLAG_SUPPORT + device->save_item(NAME(ST->busy_expiry_time) ); +#endif + device->save_item(NAME(ST->address) ); + device->save_item(NAME(ST->irq) ); + device->save_item(NAME(ST->irqmask) ); + device->save_item(NAME(ST->status) ); + device->save_item(NAME(ST->mode) ); + device->save_item(NAME(ST->prescaler_sel) ); + device->save_item(NAME(ST->fn_h) ); + device->save_item(NAME(ST->TA) ); + device->save_item(NAME(ST->TAC) ); + device->save_item(NAME(ST->TB) ); + device->save_item(NAME(ST->TBC) ); +} +#endif /* _STATE_H */ + +#if BUILD_OPN +/* write a OPN mode register 0x20-0x2f */ +static void OPNWriteMode(fm2612_FM_OPN *OPN, int r, int v) +{ + UINT8 c; + fm2612_FM_CH *CH; + + switch(r) + { + case 0x21: /* Test */ + break; + case 0x22: /* LFO FREQ (YM2608/YM2610/YM2610B/YM2612) */ + if (v&8) /* LFO enabled ? */ + { + OPN->lfo_timer_overflow = lfo_samples_per_step[v&7] << LFO_SH; + } + else + { + /* hold LFO waveform in reset state */ + OPN->lfo_timer_overflow = 0; + OPN->lfo_timer = 0; + OPN->lfo_cnt = 0; + OPN->LFO_PM = 0; + OPN->LFO_AM = 126; + } + break; + case 0x24: /* timer A High 8*/ + OPN->ST.TA = (OPN->ST.TA & 0x03)|(((int)v)<<2); + break; + case 0x25: /* timer A Low 2*/ + OPN->ST.TA = (OPN->ST.TA & 0x3fc)|(v&3); + break; + case 0x26: /* timer B */ + OPN->ST.TB = v; + break; + case 0x27: /* mode, timer control */ + set_timers( OPN, &(OPN->ST),OPN->ST.param,v ); + break; + case 0x28: /* key on / off */ + c = v & 0x03; + if( c == 3 ) break; + if( (v&0x04) && (OPN->type & TYPE_6CH) ) c+=3; + CH = OPN->P_CH; + CH = &CH[c]; + if(v&0x10) FM_KEYON(OPN,CH,SLOT1); else FM_KEYOFF(OPN,CH,SLOT1); + if(v&0x20) FM_KEYON(OPN,CH,SLOT2); else FM_KEYOFF(OPN,CH,SLOT2); + if(v&0x40) FM_KEYON(OPN,CH,SLOT3); else FM_KEYOFF(OPN,CH,SLOT3); + if(v&0x80) FM_KEYON(OPN,CH,SLOT4); else FM_KEYOFF(OPN,CH,SLOT4); + break; + } +} + +/* write a OPN register (0x30-0xff) */ +static void OPNWriteReg(fm2612_FM_OPN *OPN, int r, int v) +{ + fm2612_FM_CH *CH; + fm2612_FM_SLOT *SLOT; + + UINT8 c = OPN_CHAN(r); + + if (c == 3) return; /* 0xX3,0xX7,0xXB,0xXF */ + + if (r >= 0x100) c+=3; + + CH = OPN->P_CH; + CH = &CH[c]; + + SLOT = &(CH->SLOT[OPN_SLOT(r)]); + + switch( r & 0xf0 ) { + case 0x30: /* DET , MUL */ + set_det_mul(&OPN->ST,CH,SLOT,v); + break; + + case 0x40: /* TL */ + set_tl(CH,SLOT,v); + break; + + case 0x50: /* KS, AR */ + set_ar_ksr(OPN->type,CH,SLOT,v); + break; + + case 0x60: /* bit7 = AM ENABLE, DR */ + set_dr(OPN->type, SLOT,v); + + if(OPN->type & TYPE_LFOPAN) /* YM2608/2610/2610B/2612 */ + { + SLOT->AMmask = (v&0x80) ? ~0 : 0; + } + break; + + case 0x70: /* SR */ + set_sr(OPN->type,SLOT,v); + break; + + case 0x80: /* SL, RR */ + set_sl_rr(OPN->type,SLOT,v); + break; + + case 0x90: /* SSG-EG */ + SLOT->ssg = v&0x0f; + + /* recalculate EG output */ + if ((SLOT->ssg&0x08) && (SLOT->ssgn ^ (SLOT->ssg&0x04)) && (SLOT->state > EG_REL)) + SLOT->vol_out = ((UINT32)(0x200 - SLOT->volume) & MAX_ATT_INDEX) + SLOT->tl; + else + SLOT->vol_out = (UINT32)SLOT->volume + SLOT->tl; + + /* SSG-EG envelope shapes : + + E AtAlH + 1 0 0 0 \\\\ + + 1 0 0 1 \___ + + 1 0 1 0 \/\/ + ___ + 1 0 1 1 \ + + 1 1 0 0 //// + ___ + 1 1 0 1 / + + 1 1 1 0 /\/\ + + 1 1 1 1 /___ + + + E = SSG-EG enable + + + The shapes are generated using Attack, Decay and Sustain phases. + + Each single character in the diagrams above represents this whole + sequence: + + - when KEY-ON = 1, normal Attack phase is generated (*without* any + difference when compared to normal mode), + + - later, when envelope level reaches minimum level (max volume), + the EG switches to Decay phase (which works with bigger steps + when compared to normal mode - see below), + + - later when envelope level passes the SL level, + the EG swithes to Sustain phase (which works with bigger steps + when compared to normal mode - see below), + + - finally when envelope level reaches maximum level (min volume), + the EG switches to Attack phase again (depends on actual waveform). + + Important is that when switch to Attack phase occurs, the phase counter + of that operator will be zeroed-out (as in normal KEY-ON) but not always. + (I havent found the rule for that - perhaps only when the output level is low) + + The difference (when compared to normal Envelope Generator mode) is + that the resolution in Decay and Sustain phases is 4 times lower; + this results in only 256 steps instead of normal 1024. + In other words: + when SSG-EG is disabled, the step inside of the EG is one, + when SSG-EG is enabled, the step is four (in Decay and Sustain phases). + + Times between the level changes are the same in both modes. + + + Important: + Decay 1 Level (so called SL) is compared to actual SSG-EG output, so + it is the same in both SSG and no-SSG modes, with this exception: + + when the SSG-EG is enabled and is generating raising levels + (when the EG output is inverted) the SL will be found at wrong level !!! + For example, when SL=02: + 0 -6 = -6dB in non-inverted EG output + 96-6 = -90dB in inverted EG output + Which means that EG compares its level to SL as usual, and that the + output is simply inverted afterall. + + + The Yamaha's manuals say that AR should be set to 0x1f (max speed). + That is not necessary, but then EG will be generating Attack phase. + + */ + + + break; + + case 0xa0: + switch( OPN_SLOT(r) ) + { + case 0: /* 0xa0-0xa2 : FNUM1 */ + { + UINT32 fn = (((UINT32)( (OPN->ST.fn_h)&7))<<8) + v; + UINT8 blk = OPN->ST.fn_h>>3; + /* keyscale code */ + CH->kcode = (blk<<2) | opn_fktable[(fn >> 7) & 0xf]; + /* phase increment counter */ + CH->fc = OPN->fn_table[fn*2]>>(7-blk); + + /* store fnum in clear form for LFO PM calculations */ + CH->block_fnum = (blk<<11) | fn; + + CH->SLOT[SLOT1].Incr=-1; + } + break; + case 1: /* 0xa4-0xa6 : FNUM2,BLK */ + OPN->ST.fn_h = v&0x3f; + break; + case 2: /* 0xa8-0xaa : 3CH FNUM1 */ + if(r < 0x100) + { + UINT32 fn = (((UINT32)(OPN->SL3.fn_h&7))<<8) + v; + UINT8 blk = OPN->SL3.fn_h>>3; + /* keyscale code */ + OPN->SL3.kcode[c]= (blk<<2) | opn_fktable[(fn >> 7) & 0xf]; + /* phase increment counter */ + OPN->SL3.fc[c] = OPN->fn_table[fn*2]>>(7-blk); + OPN->SL3.block_fnum[c] = (blk<<11) | fn; + (OPN->P_CH)[2].SLOT[SLOT1].Incr=-1; + } + break; + case 3: /* 0xac-0xae : 3CH FNUM2,BLK */ + if(r < 0x100) + OPN->SL3.fn_h = v&0x3f; + break; + } + break; + + case 0xb0: + switch( OPN_SLOT(r) ) + { + case 0: /* 0xb0-0xb2 : FB,ALGO */ + { + int feedback = (v>>3)&7; + CH->ALGO = v&7; + CH->FB = feedback ? feedback+6 : 0; + setup_connection( OPN, CH, c ); + } + break; + case 1: /* 0xb4-0xb6 : L , R , AMS , PMS (YM2612/YM2610B/YM2610/YM2608) */ + if( OPN->type & TYPE_LFOPAN) + { + /* b0-2 PMS */ + CH->pms = (v & 7) * 32; /* CH->pms = PM depth * 32 (index in lfo_pm_table) */ + + /* b4-5 AMS */ + CH->ams = lfo_ams_depth_shift[(v>>4) & 0x03]; + + /* PAN : b7 = L, b6 = R */ + OPN->pan[ c*2 ] = (v & 0x80) ? ~0 : 0; + OPN->pan[ c*2+1 ] = (v & 0x40) ? ~0 : 0; + + } + break; + } + break; + } +} + +/* initialize time tables */ +static void init_timetables(fm2612_FM_OPN *OPN, double freqbase) +{ + int i,d; + double rate; + + /* DeTune table */ + for (d = 0;d <= 3;d++) + { + for (i = 0;i <= 31;i++) + { + rate = ((double)dt_tab[d*32 + i]) * freqbase * (1<<(FREQ_SH-10)); /* -10 because chip works with 10.10 fixed point, while we use 16.16 */ + OPN->ST.dt_tab[d][i] = (INT32) rate; + OPN->ST.dt_tab[d+4][i] = -OPN->ST.dt_tab[d][i]; + } + } + + /* there are 2048 FNUMs that can be generated using FNUM/BLK registers + but LFO works with one more bit of a precision so we really need 4096 elements */ + /* calculate fnumber -> increment counter table */ + for(i = 0; i < 4096; i++) + { + /* freq table for octave 7 */ + /* OPN phase increment counter = 20bit */ + /* the correct formula is : F-Number = (144 * fnote * 2^20 / M) / 2^(B-1) */ + /* where sample clock is M/144 */ + /* this means the increment value for one clock sample is FNUM * 2^(B-1) = FNUM * 64 for octave 7 */ + /* we also need to handle the ratio between the chip frequency and the emulated frequency (can be 1.0) */ + OPN->fn_table[i] = (UINT32)( (double)i * 32 * freqbase * (1<<(FREQ_SH-10)) ); /* -10 because chip works with 10.10 fixed point, while we use 16.16 */ + } + + /* maximal frequency is required for Phase overflow calculation, register size is 17 bits (Nemesis) */ + OPN->fn_max = (UINT32)( (double)0x20000 * freqbase * (1<<(FREQ_SH-10)) ); +} + +/* prescaler set (and make time tables) */ +static void OPNSetPres(fm2612_FM_OPN *OPN, int pres, int timer_prescaler, int SSGpres) +{ + /* frequency base */ + OPN->ST.freqbase = (OPN->ST.rate) ? ((double)OPN->ST.clock / OPN->ST.rate) / pres : 0; + + /* EG is updated every 3 samples */ + OPN->eg_timer_add = (UINT32)((1<<EG_SH) * OPN->ST.freqbase); + OPN->eg_timer_overflow = ( 3 ) * (1<<EG_SH); + + /* LFO timer increment (every samples) */ + OPN->lfo_timer_add = (UINT32)((1<<LFO_SH) * OPN->ST.freqbase); + + /* Timer base time */ + OPN->ST.timer_prescaler = timer_prescaler; + + /* SSG part prescaler set */ + if( SSGpres ) (*OPN->ST.SSG->set_clock)( OPN->ST.param, OPN->ST.clock * 2 / SSGpres ); + + /* make time tables */ + init_timetables(OPN, OPN->ST.freqbase); +} + +static void reset_channels(fm2612_FM_ST *ST , fm2612_FM_CH *CH , int num) +{ + int c,s; + + for( c = 0 ; c < num ; c++ ) + { + CH[c].fc = 0; + for(s = 0 ; s < 4 ; s++ ) + { + CH[c].SLOT[s].ssg = 0; + CH[c].SLOT[s].ssgn = 0; + CH[c].SLOT[s].state= EG_OFF; + CH[c].SLOT[s].volume = MAX_ATT_INDEX; + CH[c].SLOT[s].vol_out= MAX_ATT_INDEX; + } + } +} + +/* initialize generic tables */ +static void init_tables(void) +{ + signed int i,x; + signed int n; + double o,m; + + /* build Linear Power Table */ + for (x=0; x<TL_RES_LEN; x++) + { + m = (1<<16) / pow(2, (x+1) * (ENV_STEP/4.0) / 8.0); + m = floor(m); + + /* we never reach (1<<16) here due to the (x+1) */ + /* result fits within 16 bits at maximum */ + + n = (int)m; /* 16 bits here */ + n >>= 4; /* 12 bits here */ + if (n&1) /* round to nearest */ + n = (n>>1)+1; + else + n = n>>1; + /* 11 bits here (rounded) */ + n <<= 2; /* 13 bits here (as in real chip) */ + + + /* 14 bits (with sign bit) */ + tl_tab[ x*2 + 0 ] = n; + tl_tab[ x*2 + 1 ] = -tl_tab[ x*2 + 0 ]; + + /* one entry in the 'Power' table use the following format, xxxxxyyyyyyyys with: */ + /* s = sign bit */ + /* yyyyyyyy = 8-bits decimal part (0-TL_RES_LEN) */ + /* xxxxx = 5-bits integer 'shift' value (0-31) but, since Power table output is 13 bits, */ + /* any value above 13 (included) would be discarded. */ + for (i=1; i<13; i++) + { + tl_tab[ x*2+0 + i*2*TL_RES_LEN ] = tl_tab[ x*2+0 ]>>i; + tl_tab[ x*2+1 + i*2*TL_RES_LEN ] = -tl_tab[ x*2+0 + i*2*TL_RES_LEN ]; + } + } + + /* build Logarithmic Sinus table */ + for (i=0; i<SIN_LEN; i++) + { + /* non-standard sinus */ + m = sin( ((i*2)+1) * M_PI / SIN_LEN ); /* checked against the real chip */ + /* we never reach zero here due to ((i*2)+1) */ + + if (m>0.0) + o = 8*log(1.0/m)/log(2.0); /* convert to 'decibels' */ + else + o = 8*log(-1.0/m)/log(2.0); /* convert to 'decibels' */ + + o = o / (ENV_STEP/4); + + n = (int)(2.0*o); + if (n&1) /* round to nearest */ + n = (n>>1)+1; + else + n = n>>1; + + /* 13-bits (8.5) value is formatted for above 'Power' table */ + sin_tab[ i ] = n*2 + (m>=0.0? 0: 1 ); + } + + /* build LFO PM modulation table */ + for(i = 0; i < 8; i++) /* 8 PM depths */ + { + UINT8 fnum; + for (fnum=0; fnum<128; fnum++) /* 7 bits meaningful of F-NUMBER */ + { + UINT8 value; + UINT8 step; + UINT32 offset_depth = i; + UINT32 offset_fnum_bit; + UINT32 bit_tmp; + + for (step=0; step<8; step++) + { + value = 0; + for (bit_tmp=0; bit_tmp<7; bit_tmp++) /* 7 bits */ + { + if (fnum & (1<<bit_tmp)) /* only if bit "bit_tmp" is set */ + { + offset_fnum_bit = bit_tmp * 8; + value += lfo_pm_output[offset_fnum_bit + offset_depth][step]; + } + } + /* 32 steps for LFO PM (sinus) */ + lfo_pm_table[(fnum*32*8) + (i*32) + step + 0] = value; + lfo_pm_table[(fnum*32*8) + (i*32) +(step^7)+ 8] = value; + lfo_pm_table[(fnum*32*8) + (i*32) + step +16] = -value; + lfo_pm_table[(fnum*32*8) + (i*32) +(step^7)+24] = -value; + } + + } + } + +#ifdef SAVE_SAMPLE + sample[0]=fopen("sampsum.pcm","wb"); +#endif +} + +#endif /* BUILD_OPN */ + +#if (BUILD_YM2612||BUILD_YM3438) +/*******************************************************************************/ +/* YM2612 local section */ +/*******************************************************************************/ + +/* Generate samples for one of the YM2612s */ +void ym2612_update_one(void *chip, FMSAMPLE **buffer, int length) +{ + YM2612 *F2612 = (YM2612 *)chip; + fm2612_FM_OPN *OPN = &F2612->OPN; + INT32 *out_fm = OPN->out_fm; + int i; + FMSAMPLE *bufL,*bufR; + fm2612_FM_CH *cch[6]; + int lt,rt; + + /* set bufer */ + bufL = buffer[0]; + bufR = buffer[1]; + + cch[0] = &F2612->CH[0]; + cch[1] = &F2612->CH[1]; + cch[2] = &F2612->CH[2]; + cch[3] = &F2612->CH[3]; + cch[4] = &F2612->CH[4]; + cch[5] = &F2612->CH[5]; + + /* refresh PG and EG */ + refresh_fc_eg_chan( OPN, cch[0] ); + refresh_fc_eg_chan( OPN, cch[1] ); + if( (OPN->ST.mode & 0xc0) ) + { + /* 3SLOT MODE */ + if( cch[2]->SLOT[SLOT1].Incr==-1) + { + refresh_fc_eg_slot(OPN, &cch[2]->SLOT[SLOT1] , OPN->SL3.fc[1] , OPN->SL3.kcode[1] ); + refresh_fc_eg_slot(OPN, &cch[2]->SLOT[SLOT2] , OPN->SL3.fc[2] , OPN->SL3.kcode[2] ); + refresh_fc_eg_slot(OPN, &cch[2]->SLOT[SLOT3] , OPN->SL3.fc[0] , OPN->SL3.kcode[0] ); + refresh_fc_eg_slot(OPN, &cch[2]->SLOT[SLOT4] , cch[2]->fc , cch[2]->kcode ); + } + }else refresh_fc_eg_chan( OPN, cch[2] ); + refresh_fc_eg_chan( OPN, cch[3] ); + refresh_fc_eg_chan( OPN, cch[4] ); + refresh_fc_eg_chan( OPN, cch[5] ); + + /* buffering */ + for(i=0; i < length ; i++) + { + /* clear outputs */ + out_fm[0] = 0; + out_fm[1] = 0; + out_fm[2] = 0; + out_fm[3] = 0; + out_fm[4] = 0; + out_fm[5] = 0; + + /* update SSG-EG output */ + update_ssg_eg_channel(&cch[0]->SLOT[SLOT1]); + update_ssg_eg_channel(&cch[1]->SLOT[SLOT1]); + update_ssg_eg_channel(&cch[2]->SLOT[SLOT1]); + update_ssg_eg_channel(&cch[3]->SLOT[SLOT1]); + update_ssg_eg_channel(&cch[4]->SLOT[SLOT1]); + update_ssg_eg_channel(&cch[5]->SLOT[SLOT1]); + + /* calculate FM */ + chan_calc(F2612, OPN, cch[0]); + chan_calc(F2612, OPN, cch[1]); + chan_calc(F2612, OPN, cch[2]); + chan_calc(F2612, OPN, cch[3]); + chan_calc(F2612, OPN, cch[4]); + if( F2612->dacen ) + *cch[5]->connect4 += F2612->dacout; + else + chan_calc(F2612, OPN, cch[5]); + + /* advance LFO */ + advance_lfo(OPN); + + /* advance envelope generator */ + OPN->eg_timer += OPN->eg_timer_add; + while (OPN->eg_timer >= OPN->eg_timer_overflow) + { + OPN->eg_timer -= OPN->eg_timer_overflow; + OPN->eg_cnt++; + + advance_eg_channel(OPN, &cch[0]->SLOT[SLOT1]); + advance_eg_channel(OPN, &cch[1]->SLOT[SLOT1]); + advance_eg_channel(OPN, &cch[2]->SLOT[SLOT1]); + advance_eg_channel(OPN, &cch[3]->SLOT[SLOT1]); + advance_eg_channel(OPN, &cch[4]->SLOT[SLOT1]); + advance_eg_channel(OPN, &cch[5]->SLOT[SLOT1]); + } + + if (out_fm[0] > 8191) out_fm[0] = 8191; + else if (out_fm[0] < -8192) out_fm[0] = -8192; + if (out_fm[1] > 8191) out_fm[1] = 8191; + else if (out_fm[1] < -8192) out_fm[1] = -8192; + if (out_fm[2] > 8191) out_fm[2] = 8191; + else if (out_fm[2] < -8192) out_fm[2] = -8192; + if (out_fm[3] > 8191) out_fm[3] = 8191; + else if (out_fm[3] < -8192) out_fm[3] = -8192; + if (out_fm[4] > 8191) out_fm[4] = 8191; + else if (out_fm[4] < -8192) out_fm[4] = -8192; + if (out_fm[5] > 8191) out_fm[5] = 8191; + else if (out_fm[5] < -8192) out_fm[5] = -8192; + + /* 6-channels mixing */ + lt = ((out_fm[0]>>0) & OPN->pan[0]); + rt = ((out_fm[0]>>0) & OPN->pan[1]); + lt += ((out_fm[1]>>0) & OPN->pan[2]); + rt += ((out_fm[1]>>0) & OPN->pan[3]); + lt += ((out_fm[2]>>0) & OPN->pan[4]); + rt += ((out_fm[2]>>0) & OPN->pan[5]); + lt += ((out_fm[3]>>0) & OPN->pan[6]); + rt += ((out_fm[3]>>0) & OPN->pan[7]); + lt += ((out_fm[4]>>0) & OPN->pan[8]); + rt += ((out_fm[4]>>0) & OPN->pan[9]); + lt += ((out_fm[5]>>0) & OPN->pan[10]); + rt += ((out_fm[5]>>0) & OPN->pan[11]); + +// Limit( lt, MAXOUT, MINOUT ); +// Limit( rt, MAXOUT, MINOUT ); + + #ifdef SAVE_SAMPLE + SAVE_ALL_CHANNELS + #endif + + /* buffering */ + bufL[i] = lt; + bufR[i] = rt; + + /* CSM mode: if CSM Key ON has occurred, CSM Key OFF need to be sent */ + /* only if Timer A does not overflow again (i.e CSM Key ON not set again) */ + OPN->SL3.key_csm <<= 1; + + /* timer A control */ + INTERNAL_TIMER_A( &OPN->ST , cch[2] ) + + /* CSM Mode Key ON still disabled */ + /* CSM Mode Key OFF (verified by Nemesis on real hardware) */ + FM_KEYOFF_CSM(cch[2],SLOT1); + FM_KEYOFF_CSM(cch[2],SLOT2); + FM_KEYOFF_CSM(cch[2],SLOT3); + FM_KEYOFF_CSM(cch[2],SLOT4); + OPN->SL3.key_csm = 0; + } + + /* timer B control */ + INTERNAL_TIMER_B(&OPN->ST,length) +} + +#ifdef __SAVE_H__ +void ym2612_postload(void *chip) +{ + if (chip) + { + YM2612 *F2612 = (YM2612 *)chip; + int r; + + /* DAC data & port */ + F2612->dacout = ((int)F2612->REGS[0x2a] - 0x80) << 6; /* level unknown */ + F2612->dacen = F2612->REGS[0x2b] & 0x80; + /* OPN registers */ + /* DT / MULTI , TL , KS / AR , AMON / DR , SR , SL / RR , SSG-EG */ + for(r=0x30;r<0x9e;r++) + if((r&3) != 3) + { + OPNWriteReg(&F2612->OPN,r,F2612->REGS[r]); + OPNWriteReg(&F2612->OPN,r|0x100,F2612->REGS[r|0x100]); + } + /* FB / CONNECT , L / R / AMS / PMS */ + for(r=0xb0;r<0xb6;r++) + if((r&3) != 3) + { + OPNWriteReg(&F2612->OPN,r,F2612->REGS[r]); + OPNWriteReg(&F2612->OPN,r|0x100,F2612->REGS[r|0x100]); + } + /* channels */ + /*FM_channel_postload(F2612->CH,6);*/ + } +} + +static void YM2612_save_state(YM2612 *F2612, device_t *device) +{ + device->save_item(NAME(F2612->REGS)); + FMsave_state_st(device,&F2612->OPN.ST); + FMsave_state_channel(device,F2612->CH,6); + /* 3slots */ + device->save_item(NAME(F2612->OPN.SL3.fc)); + device->save_item(NAME(F2612->OPN.SL3.fn_h)); + device->save_item(NAME(F2612->OPN.SL3.kcode)); + /* address register1 */ + device->save_item(NAME(F2612->addr_A1)); +} +#endif /* _STATE_H */ + +/* initialize YM2612 emulator(s) */ +void * ym2612_init(void *param, device_t *device, int clock, int rate, + FM_TIMERHANDLER timer_handler,FM_IRQHANDLER IRQHandler) +{ + YM2612 *F2612; + + /* allocate extend state space */ + F2612 = auto_alloc_clear(device->machine(), YM2612); + /* allocate total level table (128kb space) */ + init_tables(); + + F2612->device = device; + F2612->OPN.ST.param = param; + F2612->OPN.type = TYPE_YM2612; + F2612->OPN.P_CH = F2612->CH; + F2612->OPN.ST.device = device; + F2612->OPN.ST.clock = clock; + F2612->OPN.ST.rate = rate; + /* F2612->OPN.ST.irq = 0; */ + /* F2612->OPN.ST.status = 0; */ + /* Extend handler */ + F2612->OPN.ST.timer_handler = timer_handler; + F2612->OPN.ST.IRQ_Handler = IRQHandler; + +#ifdef __SAVE_H__ + YM2612_save_state(F2612, device); +#endif + return F2612; +} + +/* shut down emulator */ +void ym2612_shutdown(void *chip) +{ + YM2612 *F2612 = (YM2612 *)chip; + + FMCloseTable(); + auto_free(F2612->OPN.ST.device->machine(), F2612); +} + +/* reset one of chip */ +void ym2612_reset_chip(void *chip) +{ + int i; + YM2612 *F2612 = (YM2612 *)chip; + fm2612_FM_OPN *OPN = &F2612->OPN; + + OPNSetPres( OPN, 6*24, 6*24, 0); + /* status clear */ + FM_IRQMASK_SET(&OPN->ST,0x03); + FM_BUSY_CLEAR(&OPN->ST); + OPNWriteMode(OPN,0x27,0x30); /* mode 0 , timer reset */ + + OPN->eg_timer = 0; + OPN->eg_cnt = 0; + + OPN->lfo_timer = 0; + OPN->lfo_cnt = 0; + OPN->LFO_AM = 126; + OPN->LFO_PM = 0; + + OPN->ST.status = 0; + OPN->ST.mode = 0; + + OPNWriteMode(OPN,0x27,0x30); + OPNWriteMode(OPN,0x26,0x00); + OPNWriteMode(OPN,0x25,0x00); + OPNWriteMode(OPN,0x24,0x00); + + reset_channels( &OPN->ST , &F2612->CH[0] , 6 ); + + for(i = 0xb6 ; i >= 0xb4 ; i-- ) + { + OPNWriteReg(OPN,i ,0xc0); + OPNWriteReg(OPN,i|0x100,0xc0); + } + for(i = 0xb2 ; i >= 0x30 ; i-- ) + { + OPNWriteReg(OPN,i ,0); + OPNWriteReg(OPN,i|0x100,0); + } + + /* DAC mode clear */ + F2612->dacen = 0; + F2612->dacout = 0; +} + +/* YM2612 write */ +/* n = number */ +/* a = address */ +/* v = value */ +int ym2612_write(void *chip, int a, UINT8 v) +{ + YM2612 *F2612 = (YM2612 *)chip; + int addr; + + v &= 0xff; /* adjust to 8 bit bus */ + + switch( a&3) + { + case 0: /* address port 0 */ + F2612->OPN.ST.address = v; + F2612->addr_A1 = 0; + break; + + case 1: /* data port 0 */ + if (F2612->addr_A1 != 0) + break; /* verified on real YM2608 */ + + addr = F2612->OPN.ST.address; + F2612->REGS[addr] = v; + switch( addr & 0xf0 ) + { + case 0x20: /* 0x20-0x2f Mode */ + switch( addr ) + { + case 0x2a: /* DAC data (YM2612) */ + ym2612_update_req(F2612->OPN.ST.param); + F2612->dacout = ((int)v - 0x80) << 6; /* level unknown */ + break; + case 0x2b: /* DAC Sel (YM2612) */ + /* b7 = dac enable */ + F2612->dacen = v & 0x80; + break; + default: /* OPN section */ + ym2612_update_req(F2612->OPN.ST.param); + /* write register */ + OPNWriteMode(&(F2612->OPN),addr,v); + } + break; + default: /* 0x30-0xff OPN section */ + ym2612_update_req(F2612->OPN.ST.param); + /* write register */ + OPNWriteReg(&(F2612->OPN),addr,v); + } + break; + + case 2: /* address port 1 */ + F2612->OPN.ST.address = v; + F2612->addr_A1 = 1; + break; + + case 3: /* data port 1 */ + if (F2612->addr_A1 != 1) + break; /* verified on real YM2608 */ + + addr = F2612->OPN.ST.address; + F2612->REGS[addr | 0x100] = v; + ym2612_update_req(F2612->OPN.ST.param); + OPNWriteReg(&(F2612->OPN),addr | 0x100,v); + break; + } + return F2612->OPN.ST.irq; +} + +UINT8 ym2612_read(void *chip,int a) +{ + YM2612 *F2612 = (YM2612 *)chip; + + switch( a&3) + { + case 0: /* status 0 */ + return FM_STATUS_FLAG(&F2612->OPN.ST); + case 1: + case 2: + case 3: + LOG(F2612->device,LOG_WAR,("YM2612 #%p:A=%d read unmapped area\n",F2612->OPN.ST.param,a)); + return FM_STATUS_FLAG(&F2612->OPN.ST); + } + return 0; +} + +int ym2612_timer_over(void *chip,int c) +{ + YM2612 *F2612 = (YM2612 *)chip; + + if( c ) + { /* Timer B */ + TimerBOver( &(F2612->OPN.ST) ); + } + else + { /* Timer A */ + ym2612_update_req(F2612->OPN.ST.param); + /* timer update */ + TimerAOver( &(F2612->OPN.ST) ); + /* CSM mode key,TL controll */ + if ((F2612->OPN.ST.mode & 0xc0) == 0x80) + { /* CSM mode total level latch and auto key on */ + CSMKeyControll( &F2612->OPN, &(F2612->CH[2]) ); + } + } + return F2612->OPN.ST.irq; +} + +#endif /* (BUILD_YM2612||BUILD_YM3238) */ |