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Diffstat (limited to 'src/devices/sound/ym2413.cpp')
-rw-r--r-- | src/devices/sound/ym2413.cpp | 2176 |
1 files changed, 2176 insertions, 0 deletions
diff --git a/src/devices/sound/ym2413.cpp b/src/devices/sound/ym2413.cpp new file mode 100644 index 00000000000..505e3385fc6 --- /dev/null +++ b/src/devices/sound/ym2413.cpp @@ -0,0 +1,2176 @@ +// license:??? +// copyright-holders:Jarek Burczynski +/* +** +** File: ym2413.c - software implementation of YM2413 +** FM sound generator type OPLL +** +** Copyright Jarek Burczynski +** +** Version 1.0 +** + + Features as listed in LSI-212413A2 data sheet: + 1. FM Sound Generator for real sound creation. + 2. Two Selectable modes: 9 simultaneous sounds or 6 melody sounds plus 5 rhythm sounds + (different tones can be used together in either case). + 3. Built-in Instruments data (15 melody tones, 5 rhythm tones, "CAPTAIN and TELETEXT applicalbe tones). + 4. Built-in DA Converter. + 5. Built-in Quartz Oscillator. + 6. Built-in Vibrato Oscillator/AM Oscillator + 7. TTL Compatible Input. + 8. Si-Gate NMOS LSI + 9. A single 5V power source. + +to do: + +- make sure of the sinus amplitude bits + +- make sure of the EG resolution bits (looks like the biggest + modulation index generated by the modulator is 123, 124 = no modulation) +- find proper algorithm for attack phase of EG + +- tune up instruments ROM + +- support sample replay in test mode (it is NOT as simple as setting bit 0 + in register 0x0f and using register 0x10 for sample data). + Which games use this feature ? + + +*/ + +#include "emu.h" +#include "ym2413.h" + + + +/* output final shift */ +#if (SAMPLE_BITS==16) + #define FINAL_SH (0) + #define MAXOUT (+32767) + #define MINOUT (-32768) +#else + #define FINAL_SH (8) + #define MAXOUT (+127) + #define MINOUT (-128) +#endif + + +#define FREQ_SH 16 /* 16.16 fixed point (frequency calculations) */ +#define EG_SH 16 /* 16.16 fixed point (EG timing) */ +#define LFO_SH 24 /* 8.24 fixed point (LFO calculations) */ + +#define FREQ_MASK ((1<<FREQ_SH)-1) + +/* envelope output entries */ +#define ENV_BITS 10 +#define ENV_LEN (1<<ENV_BITS) +#define ENV_STEP (128.0/ENV_LEN) + +#define MAX_ATT_INDEX ((1<<(ENV_BITS-2))-1) /*255*/ +#define MIN_ATT_INDEX (0) + +/* sinwave entries */ +#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) */ + + + +/* register number to channel number , slot offset */ +#define SLOT1 0 +#define SLOT2 1 + +/* Envelope Generator phases */ + +#define EG_DMP 5 +#define EG_ATT 4 +#define EG_DEC 3 +#define EG_SUS 2 +#define EG_REL 1 +#define EG_OFF 0 + + +/* save output as raw 16-bit sample */ + +//#define SAVE_SAMPLE + +#ifdef SAVE_SAMPLE +INLINE signed int acc_calc(signed int value) +{ + if (value>=0) + { + if (value < 0x0200) + return (value & ~0); + if (value < 0x0400) + return (value & ~1); + if (value < 0x0800) + return (value & ~3); + if (value < 0x1000) + return (value & ~7); + if (value < 0x2000) + return (value & ~15); + if (value < 0x4000) + return (value & ~31); + return (value & ~63); + } + /*else value < 0*/ + if (value > -0x0200) + return (~abs(value) & ~0); + if (value > -0x0400) + return (~abs(value) & ~1); + if (value > -0x0800) + return (~abs(value) & ~3); + if (value > -0x1000) + return (~abs(value) & ~7); + if (value > -0x2000) + return (~abs(value) & ~15); + if (value > -0x4000) + return (~abs(value) & ~31); + return (~abs(value) & ~63); +} + + +static FILE *sample[1]; + #if 0 /*save to MONO file */ + #define SAVE_ALL_CHANNELS \ + { signed int pom = acc_calc(mo); \ + 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 = mo; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + pom = ro; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + } + #define SAVE_SEPARATE_CHANNEL(j) \ + { signed int pom = outchan; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + pom = chip->instvol_r[j]>>4; \ + fputc((unsigned short)pom&0xff,sample[0]); \ + fputc(((unsigned short)pom>>8)&0xff,sample[0]); \ + } + #endif +#endif + +#define LOG_CYM_FILE 0 +static FILE * cymfile = NULL; + + + + +struct OPLL_SLOT +{ + UINT32 ar; /* attack rate: AR<<2 */ + UINT32 dr; /* decay rate: DR<<2 */ + UINT32 rr; /* release rate:RR<<2 */ + UINT8 KSR; /* key scale rate */ + UINT8 ksl; /* keyscale level */ + UINT8 ksr; /* key scale rate: kcode>>KSR */ + UINT8 mul; /* multiple: mul_tab[ML] */ + + /* Phase Generator */ + UINT32 phase; /* frequency counter */ + UINT32 freq; /* frequency counter step */ + UINT8 fb_shift; /* feedback shift value */ + INT32 op1_out[2]; /* slot1 output for feedback */ + + /* Envelope Generator */ + UINT8 eg_type; /* percussive/nonpercussive mode*/ + UINT8 state; /* phase type */ + UINT32 TL; /* total level: TL << 2 */ + INT32 TLL; /* adjusted now TL */ + INT32 volume; /* envelope counter */ + UINT32 sl; /* sustain level: sl_tab[SL] */ + + UINT8 eg_sh_dp; /* (dump state) */ + UINT8 eg_sel_dp; /* (dump state) */ + UINT8 eg_sh_ar; /* (attack state) */ + UINT8 eg_sel_ar; /* (attack state) */ + UINT8 eg_sh_dr; /* (decay state) */ + UINT8 eg_sel_dr; /* (decay state) */ + UINT8 eg_sh_rr; /* (release state for non-perc.)*/ + UINT8 eg_sel_rr; /* (release state for non-perc.)*/ + UINT8 eg_sh_rs; /* (release state for perc.mode)*/ + UINT8 eg_sel_rs; /* (release state for perc.mode)*/ + + UINT32 key; /* 0 = KEY OFF, >0 = KEY ON */ + + /* LFO */ + UINT32 AMmask; /* LFO Amplitude Modulation enable mask */ + UINT8 vib; /* LFO Phase Modulation enable flag (active high)*/ + + /* waveform select */ + unsigned int wavetable; +}; + +struct OPLL_CH +{ + OPLL_SLOT SLOT[2]; + /* phase generator state */ + UINT32 block_fnum; /* block+fnum */ + UINT32 fc; /* Freq. freqement base */ + UINT32 ksl_base; /* KeyScaleLevel Base step */ + UINT8 kcode; /* key code (for key scaling) */ + UINT8 sus; /* sus on/off (release speed in percussive mode)*/ +}; + +/* chip state */ +struct YM2413 +{ + OPLL_CH P_CH[9]; /* OPLL chips have 9 channels*/ + UINT8 instvol_r[9]; /* instrument/volume (or volume/volume in percussive mode)*/ + + UINT32 eg_cnt; /* global envelope generator counter */ + UINT32 eg_timer; /* global envelope generator counter works at frequency = chipclock/72 */ + UINT32 eg_timer_add; /* step of eg_timer */ + UINT32 eg_timer_overflow; /* envelope generator timer overlfows every 1 sample (on real chip) */ + + UINT8 rhythm; /* Rhythm mode */ + + /* LFO */ + UINT32 LFO_AM; + INT32 LFO_PM; + UINT32 lfo_am_cnt; + UINT32 lfo_am_inc; + UINT32 lfo_pm_cnt; + UINT32 lfo_pm_inc; + + UINT32 noise_rng; /* 23 bit noise shift register */ + UINT32 noise_p; /* current noise 'phase' */ + UINT32 noise_f; /* current noise period */ + + +/* instrument settings */ +/* + 0-user instrument + 1-15 - fixed instruments + 16 -bass drum settings + 17,18 - other percussion instruments +*/ + UINT8 inst_tab[19][8]; + + /* external event callback handlers */ + OPLL_UPDATEHANDLER UpdateHandler; /* stream update handler */ + void * UpdateParam; /* stream update parameter */ + + UINT32 fn_tab[1024]; /* fnumber->increment counter */ + + UINT8 address; /* address register */ + UINT8 status; /* status flag */ + + int clock; /* master clock (Hz) */ + int rate; /* sampling rate (Hz) */ + double freqbase; /* frequency base */ + device_t *device; + + signed int output[2]; + signed int outchan; + +}; + +/* key scale level */ +/* table is 3dB/octave, DV converts this into 6dB/octave */ +/* 0.1875 is bit 0 weight of the envelope counter (volume) expressed in the 'decibel' scale */ +#define DV (0.1875/1.0) +static const UINT32 ksl_tab[8*16]= +{ + /* OCT 0 */ + 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, + 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, + 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, + 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, + /* OCT 1 */ + 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, + 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, + 0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV, + 1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV, + /* OCT 2 */ + 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, + 0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV, + 3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV, + 4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV, + /* OCT 3 */ + 0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV, + 3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV, + 6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV, + 7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV, + /* OCT 4 */ + 0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV, + 6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV, + 9.000/DV, 9.750/DV,10.125/DV,10.500/DV, + 10.875/DV,11.250/DV,11.625/DV,12.000/DV, + /* OCT 5 */ + 0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV, + 9.000/DV,10.125/DV,10.875/DV,11.625/DV, + 12.000/DV,12.750/DV,13.125/DV,13.500/DV, + 13.875/DV,14.250/DV,14.625/DV,15.000/DV, + /* OCT 6 */ + 0.000/DV, 6.000/DV, 9.000/DV,10.875/DV, + 12.000/DV,13.125/DV,13.875/DV,14.625/DV, + 15.000/DV,15.750/DV,16.125/DV,16.500/DV, + 16.875/DV,17.250/DV,17.625/DV,18.000/DV, + /* OCT 7 */ + 0.000/DV, 9.000/DV,12.000/DV,13.875/DV, + 15.000/DV,16.125/DV,16.875/DV,17.625/DV, + 18.000/DV,18.750/DV,19.125/DV,19.500/DV, + 19.875/DV,20.250/DV,20.625/DV,21.000/DV +}; +#undef DV + +/* 0 / 1.5 / 3.0 / 6.0 dB/OCT, confirmed on a real YM2413 (the application manual is incorrect) */ +static const UINT32 ksl_shift[4] = { 31, 2, 1, 0 }; + + +/* sustain level table (3dB per step) */ +/* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,45 (dB)*/ +#define SC(db) (UINT32) ( db * (1.0/ENV_STEP) ) +static const UINT32 sl_tab[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(15) +}; +#undef SC + + +#define RATE_STEPS (8) +static const unsigned char eg_inc[15*RATE_STEPS]={ +/*cycle:0 1 2 3 4 5 6 7*/ + +/* 0 */ 0,1, 0,1, 0,1, 0,1, /* rates 00..12 0 (increment by 0 or 1) */ +/* 1 */ 0,1, 0,1, 1,1, 0,1, /* rates 00..12 1 */ +/* 2 */ 0,1, 1,1, 0,1, 1,1, /* rates 00..12 2 */ +/* 3 */ 0,1, 1,1, 1,1, 1,1, /* rates 00..12 3 */ + +/* 4 */ 1,1, 1,1, 1,1, 1,1, /* rate 13 0 (increment by 1) */ +/* 5 */ 1,1, 1,2, 1,1, 1,2, /* rate 13 1 */ +/* 6 */ 1,2, 1,2, 1,2, 1,2, /* rate 13 2 */ +/* 7 */ 1,2, 2,2, 1,2, 2,2, /* rate 13 3 */ + +/* 8 */ 2,2, 2,2, 2,2, 2,2, /* rate 14 0 (increment by 2) */ +/* 9 */ 2,2, 2,4, 2,2, 2,4, /* rate 14 1 */ +/*10 */ 2,4, 2,4, 2,4, 2,4, /* rate 14 2 */ +/*11 */ 2,4, 4,4, 2,4, 4,4, /* rate 14 3 */ + +/*12 */ 4,4, 4,4, 4,4, 4,4, /* rates 15 0, 15 1, 15 2, 15 3 (increment by 4) */ +/*13 */ 8,8, 8,8, 8,8, 8,8, /* rates 15 2, 15 3 for attack */ +/*14 */ 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(13) in this table - it's directly in the code */ +static const unsigned char eg_rate_select[16+64+16]={ /* Envelope Generator rates (16 + 64 rates + 16 RKS) */ +/* 16 infinite time rates */ +O(14),O(14),O(14),O(14),O(14),O(14),O(14),O(14), +O(14),O(14),O(14),O(14),O(14),O(14),O(14),O(14), + +/* rates 00-12 */ +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), +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 13 */ +O( 4),O( 5),O( 6),O( 7), + +/* rate 14 */ +O( 8),O( 9),O(10),O(11), + +/* rate 15 */ +O(12),O(12),O(12),O(12), + +/* 16 dummy rates (same as 15 3) */ +O(12),O(12),O(12),O(12),O(12),O(12),O(12),O(12), +O(12),O(12),O(12),O(12),O(12),O(12),O(12),O(12), + +}; +#undef O + +/*rate 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 */ +/*shift 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0, 0 */ +/*mask 8191, 4095, 2047, 1023, 511, 255, 127, 63, 31, 15, 7, 3, 1, 0, 0, 0 */ + +#define O(a) (a*1) +static const unsigned char eg_rate_shift[16+64+16]={ /* Envelope Generator counter shifts (16 + 64 rates + 16 RKS) */ +/* 16 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), + +/* rates 00-12 */ +O(13),O(13),O(13),O(13), +O(12),O(12),O(12),O(12), +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), + +/* 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), + +/* 16 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), + +}; +#undef O + + +/* multiple table */ +#define ML 2 +static const UINT8 mul_tab[16]= { +/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,10,12,12,15,15 */ + ML/2, 1*ML, 2*ML, 3*ML, 4*ML, 5*ML, 6*ML, 7*ML, + 8*ML, 9*ML,10*ML,10*ML,12*ML,12*ML,15*ML,15*ML +}; +#undef ML + +/* TL_TAB_LEN is calculated as: +* 11 - sinus amplitude bits (Y axis) +* 2 - sinus sign bit (Y axis) +* TL_RES_LEN - sinus resolution (X axis) +*/ +#define TL_TAB_LEN (11*2*TL_RES_LEN) +static signed int tl_tab[TL_TAB_LEN]; + +#define ENV_QUIET (TL_TAB_LEN>>5) + +/* sin waveform table in 'decibel' scale */ +/* two waveforms on OPLL type chips */ +static unsigned int sin_tab[SIN_LEN * 2]; + + +/* LFO Amplitude Modulation table (verified on real YM3812) + 27 output levels (triangle waveform); 1 level takes one of: 192, 256 or 448 samples + + Length: 210 elements. + + Each of the elements has to be repeated + exactly 64 times (on 64 consecutive samples). + The whole table takes: 64 * 210 = 13440 samples. + +We use data>>1, until we find what it really is on real chip... + +*/ + +#define LFO_AM_TAB_ELEMENTS 210 + +static const UINT8 lfo_am_table[LFO_AM_TAB_ELEMENTS] = { +0,0,0,0,0,0,0, +1,1,1,1, +2,2,2,2, +3,3,3,3, +4,4,4,4, +5,5,5,5, +6,6,6,6, +7,7,7,7, +8,8,8,8, +9,9,9,9, +10,10,10,10, +11,11,11,11, +12,12,12,12, +13,13,13,13, +14,14,14,14, +15,15,15,15, +16,16,16,16, +17,17,17,17, +18,18,18,18, +19,19,19,19, +20,20,20,20, +21,21,21,21, +22,22,22,22, +23,23,23,23, +24,24,24,24, +25,25,25,25, +26,26,26, +25,25,25,25, +24,24,24,24, +23,23,23,23, +22,22,22,22, +21,21,21,21, +20,20,20,20, +19,19,19,19, +18,18,18,18, +17,17,17,17, +16,16,16,16, +15,15,15,15, +14,14,14,14, +13,13,13,13, +12,12,12,12, +11,11,11,11, +10,10,10,10, +9,9,9,9, +8,8,8,8, +7,7,7,7, +6,6,6,6, +5,5,5,5, +4,4,4,4, +3,3,3,3, +2,2,2,2, +1,1,1,1 +}; + +/* LFO Phase Modulation table (verified on real YM2413) */ +static const INT8 lfo_pm_table[8*8] = { +/* FNUM2/FNUM = 0 00xxxxxx (0x0000) */ +0, 0, 0, 0, 0, 0, 0, 0, + +/* FNUM2/FNUM = 0 01xxxxxx (0x0040) */ +1, 0, 0, 0,-1, 0, 0, 0, + +/* FNUM2/FNUM = 0 10xxxxxx (0x0080) */ +2, 1, 0,-1,-2,-1, 0, 1, + +/* FNUM2/FNUM = 0 11xxxxxx (0x00C0) */ +3, 1, 0,-1,-3,-1, 0, 1, + +/* FNUM2/FNUM = 1 00xxxxxx (0x0100) */ +4, 2, 0,-2,-4,-2, 0, 2, + +/* FNUM2/FNUM = 1 01xxxxxx (0x0140) */ +5, 2, 0,-2,-5,-2, 0, 2, + +/* FNUM2/FNUM = 1 10xxxxxx (0x0180) */ +6, 3, 0,-3,-6,-3, 0, 3, + +/* FNUM2/FNUM = 1 11xxxxxx (0x01C0) */ +7, 3, 0,-3,-7,-3, 0, 3, +}; + + + + + + +/* This is not 100% perfect yet but very close */ +/* + - multi parameters are 100% correct (instruments and drums) + - LFO PM and AM enable are 100% correct + - waveform DC and DM select are 100% correct +*/ + +static const unsigned char table[19][8] = { +/* MULT MULT modTL DcDmFb AR/DR AR/DR SL/RR SL/RR */ +/* 0 1 2 3 4 5 6 7 */ + {0x49, 0x4c, 0x4c, 0x12, 0x00, 0x00, 0x00, 0x00 }, //0 + + {0x61, 0x61, 0x1e, 0x17, 0xf0, 0x78, 0x00, 0x17 }, //1 + {0x13, 0x41, 0x1e, 0x0d, 0xd7, 0xf7, 0x13, 0x13 }, //2 + {0x13, 0x01, 0x99, 0x04, 0xf2, 0xf4, 0x11, 0x23 }, //3 + {0x21, 0x61, 0x1b, 0x07, 0xaf, 0x64, 0x40, 0x27 }, //4 + +//{0x22, 0x21, 0x1e, 0x09, 0xf0, 0x76, 0x08, 0x28 }, //5 + {0x22, 0x21, 0x1e, 0x06, 0xf0, 0x75, 0x08, 0x18 }, //5 + +//{0x31, 0x22, 0x16, 0x09, 0x90, 0x7f, 0x00, 0x08 }, //6 + {0x31, 0x22, 0x16, 0x05, 0x90, 0x71, 0x00, 0x13 }, //6 + + {0x21, 0x61, 0x1d, 0x07, 0x82, 0x80, 0x10, 0x17 }, //7 + {0x23, 0x21, 0x2d, 0x16, 0xc0, 0x70, 0x07, 0x07 }, //8 + {0x61, 0x61, 0x1b, 0x06, 0x64, 0x65, 0x10, 0x17 }, //9 + +//{0x61, 0x61, 0x0c, 0x08, 0x85, 0xa0, 0x79, 0x07 }, //A + {0x61, 0x61, 0x0c, 0x18, 0x85, 0xf0, 0x70, 0x07 }, //A + + {0x23, 0x01, 0x07, 0x11, 0xf0, 0xa4, 0x00, 0x22 }, //B + {0x97, 0xc1, 0x24, 0x07, 0xff, 0xf8, 0x22, 0x12 }, //C + +//{0x61, 0x10, 0x0c, 0x08, 0xf2, 0xc4, 0x40, 0xc8 }, //D + {0x61, 0x10, 0x0c, 0x05, 0xf2, 0xf4, 0x40, 0x44 }, //D + + {0x01, 0x01, 0x55, 0x03, 0xf3, 0x92, 0xf3, 0xf3 }, //E + {0x61, 0x41, 0x89, 0x03, 0xf1, 0xf4, 0xf0, 0x13 }, //F + +/* drum instruments definitions */ +/* MULTI MULTI modTL xxx AR/DR AR/DR SL/RR SL/RR */ +/* 0 1 2 3 4 5 6 7 */ + {0x01, 0x01, 0x16, 0x00, 0xfd, 0xf8, 0x2f, 0x6d },/* BD(multi verified, modTL verified, mod env - verified(close), carr. env verifed) */ + {0x01, 0x01, 0x00, 0x00, 0xd8, 0xd8, 0xf9, 0xf8 },/* HH(multi verified), SD(multi not used) */ + {0x05, 0x01, 0x00, 0x00, 0xf8, 0xba, 0x49, 0x55 },/* TOM(multi,env verified), TOP CYM(multi verified, env verified) */ +}; + +/* lock level of common table */ +static int num_lock = 0; + +/* work table */ +#define SLOT7_1 (&chip->P_CH[7].SLOT[SLOT1]) +#define SLOT7_2 (&chip->P_CH[7].SLOT[SLOT2]) +#define SLOT8_1 (&chip->P_CH[8].SLOT[SLOT1]) +#define SLOT8_2 (&chip->P_CH[8].SLOT[SLOT2]) + + +INLINE int limit( int val, int max, int min ) +{ + if ( val > max ) + val = max; + else if ( val < min ) + val = min; + + return val; +} + + +/* advance LFO to next sample */ +INLINE void advance_lfo(YM2413 *chip) +{ + /* LFO */ + chip->lfo_am_cnt += chip->lfo_am_inc; + if (chip->lfo_am_cnt >= ((UINT32)LFO_AM_TAB_ELEMENTS<<LFO_SH) ) /* lfo_am_table is 210 elements long */ + chip->lfo_am_cnt -= ((UINT32)LFO_AM_TAB_ELEMENTS<<LFO_SH); + + chip->LFO_AM = lfo_am_table[ chip->lfo_am_cnt >> LFO_SH ] >> 1; + + chip->lfo_pm_cnt += chip->lfo_pm_inc; + chip->LFO_PM = (chip->lfo_pm_cnt>>LFO_SH) & 7; +} + +/* advance to next sample */ +INLINE void advance(YM2413 *chip) +{ + OPLL_CH *CH; + OPLL_SLOT *op; + unsigned int i; + + /* Envelope Generator */ + chip->eg_timer += chip->eg_timer_add; + + while (chip->eg_timer >= chip->eg_timer_overflow) + { + chip->eg_timer -= chip->eg_timer_overflow; + + chip->eg_cnt++; + + for (i=0; i<9*2; i++) + { + CH = &chip->P_CH[i/2]; + + op = &CH->SLOT[i&1]; + + switch(op->state) + { + case EG_DMP: /* dump phase */ + /*dump phase is performed by both operators in each channel*/ + /*when CARRIER envelope gets down to zero level, + ** phases in BOTH opearators are reset (at the same time ?) + */ + if ( !(chip->eg_cnt & ((1<<op->eg_sh_dp)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_dp + ((chip->eg_cnt>>op->eg_sh_dp)&7)]; + + if ( op->volume >= MAX_ATT_INDEX ) + { + op->volume = MAX_ATT_INDEX; + op->state = EG_ATT; + /* restart Phase Generator */ + op->phase = 0; + } + } + break; + + case EG_ATT: /* attack phase */ + if ( !(chip->eg_cnt & ((1<<op->eg_sh_ar)-1) ) ) + { + op->volume += (~op->volume * + (eg_inc[op->eg_sel_ar + ((chip->eg_cnt>>op->eg_sh_ar)&7)]) + ) >>2; + + if (op->volume <= MIN_ATT_INDEX) + { + op->volume = MIN_ATT_INDEX; + op->state = EG_DEC; + } + } + break; + + case EG_DEC: /* decay phase */ + if ( !(chip->eg_cnt & ((1<<op->eg_sh_dr)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_dr + ((chip->eg_cnt>>op->eg_sh_dr)&7)]; + + if ( op->volume >= op->sl ) + op->state = EG_SUS; + } + break; + + case EG_SUS: /* sustain phase */ + /* this is important behaviour: + one can change percusive/non-percussive modes on the fly and + the chip will remain in sustain phase - verified on real YM3812 */ + + if(op->eg_type) /* non-percussive mode (sustained tone) */ + { + /* do nothing */ + } + else /* percussive mode */ + { + /* during sustain phase chip adds Release Rate (in percussive mode) */ + if ( !(chip->eg_cnt & ((1<<op->eg_sh_rr)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_rr + ((chip->eg_cnt>>op->eg_sh_rr)&7)]; + + if ( op->volume >= MAX_ATT_INDEX ) + op->volume = MAX_ATT_INDEX; + } + /* else do nothing in sustain phase */ + } + break; + + case EG_REL: /* release phase */ + /* exclude modulators in melody channels from performing anything in this mode*/ + /* allowed are only carriers in melody mode and rhythm slots in rhythm mode */ + + /*This table shows which operators and on what conditions are allowed to perform EG_REL: + (a) - always perform EG_REL + (n) - never perform EG_REL + (r) - perform EG_REL in Rhythm mode ONLY + 0: 0 (n), 1 (a) + 1: 2 (n), 3 (a) + 2: 4 (n), 5 (a) + 3: 6 (n), 7 (a) + 4: 8 (n), 9 (a) + 5: 10(n), 11(a) + 6: 12(r), 13(a) + 7: 14(r), 15(a) + 8: 16(r), 17(a) + */ + if ( (i&1) || ((chip->rhythm&0x20) && (i>=12)) )/* exclude modulators */ + { + if(op->eg_type) /* non-percussive mode (sustained tone) */ + /*this is correct: use RR when SUS = OFF*/ + /*and use RS when SUS = ON*/ + { + if (CH->sus) + { + if ( !(chip->eg_cnt & ((1<<op->eg_sh_rs)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_rs + ((chip->eg_cnt>>op->eg_sh_rs)&7)]; + if ( op->volume >= MAX_ATT_INDEX ) + { + op->volume = MAX_ATT_INDEX; + op->state = EG_OFF; + } + } + } + else + { + if ( !(chip->eg_cnt & ((1<<op->eg_sh_rr)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_rr + ((chip->eg_cnt>>op->eg_sh_rr)&7)]; + if ( op->volume >= MAX_ATT_INDEX ) + { + op->volume = MAX_ATT_INDEX; + op->state = EG_OFF; + } + } + } + } + else /* percussive mode */ + { + if ( !(chip->eg_cnt & ((1<<op->eg_sh_rs)-1) ) ) + { + op->volume += eg_inc[op->eg_sel_rs + ((chip->eg_cnt>>op->eg_sh_rs)&7)]; + if ( op->volume >= MAX_ATT_INDEX ) + { + op->volume = MAX_ATT_INDEX; + op->state = EG_OFF; + } + } + } + } + break; + + default: + break; + } + } + } + + for (i=0; i<9*2; i++) + { + CH = &chip->P_CH[i/2]; + op = &CH->SLOT[i&1]; + + /* Phase Generator */ + if(op->vib) + { + UINT8 block; + + unsigned int fnum_lfo = 8*((CH->block_fnum&0x01c0) >> 6); + unsigned int block_fnum = CH->block_fnum * 2; + signed int lfo_fn_table_index_offset = lfo_pm_table[chip->LFO_PM + fnum_lfo ]; + + if (lfo_fn_table_index_offset) /* LFO phase modulation active */ + { + block_fnum += lfo_fn_table_index_offset; + block = (block_fnum&0x1c00) >> 10; + op->phase += (chip->fn_tab[block_fnum&0x03ff] >> (7-block)) * op->mul; + } + else /* LFO phase modulation = zero */ + { + op->phase += op->freq; + } + } + else /* LFO phase modulation disabled for this operator */ + { + op->phase += op->freq; + } + } + + /* The Noise Generator of the YM3812 is 23-bit shift register. + * Period is equal to 2^23-2 samples. + * Register works at sampling frequency of the chip, so output + * can change on every sample. + * + * Output of the register and input to the bit 22 is: + * bit0 XOR bit14 XOR bit15 XOR bit22 + * + * Simply use bit 22 as the noise output. + */ + + chip->noise_p += chip->noise_f; + i = chip->noise_p >> FREQ_SH; /* number of events (shifts of the shift register) */ + chip->noise_p &= FREQ_MASK; + while (i) + { + /* + UINT32 j; + j = ( (chip->noise_rng) ^ (chip->noise_rng>>14) ^ (chip->noise_rng>>15) ^ (chip->noise_rng>>22) ) & 1; + chip->noise_rng = (j<<22) | (chip->noise_rng>>1); + */ + + /* + Instead of doing all the logic operations above, we + use a trick here (and use bit 0 as the noise output). + The difference is only that the noise bit changes one + step ahead. This doesn't matter since we don't know + what is real state of the noise_rng after the reset. + */ + + if (chip->noise_rng & 1) chip->noise_rng ^= 0x800302; + chip->noise_rng >>= 1; + + i--; + } +} + + +INLINE signed int op_calc(UINT32 phase, unsigned int env, signed int pm, unsigned int wave_tab) +{ + UINT32 p; + + p = (env<<5) + sin_tab[wave_tab + ((((signed int)((phase & ~FREQ_MASK) + (pm<<17))) >> 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, unsigned int wave_tab) +{ + UINT32 p; + INT32 i; + + i = (phase & ~FREQ_MASK) + pm; + +/*logerror("i=%08x (i>>16)&511=%8i phase=%i [pm=%08x] ",i, (i>>16)&511, phase>>FREQ_SH, pm);*/ + + p = (env<<5) + sin_tab[ wave_tab + ((i>>FREQ_SH) & SIN_MASK)]; + +/*logerror("(p&255=%i p>>8=%i) out= %i\n", p&255,p>>8, tl_tab[p&255]>>(p>>8) );*/ + + if (p >= TL_TAB_LEN) + return 0; + return tl_tab[p]; +} + + +#define volume_calc(OP) ((OP)->TLL + ((UINT32)(OP)->volume) + (chip->LFO_AM & (OP)->AMmask)) + +/* calculate output */ +INLINE void chan_calc( YM2413 *chip, OPLL_CH *CH ) +{ + OPLL_SLOT *SLOT; + unsigned int env; + signed int out; + signed int phase_modulation; /* phase modulation input (SLOT 2) */ + + + /* SLOT 1 */ + SLOT = &CH->SLOT[SLOT1]; + env = volume_calc(SLOT); + out = SLOT->op1_out[0] + SLOT->op1_out[1]; + + SLOT->op1_out[0] = SLOT->op1_out[1]; + phase_modulation = SLOT->op1_out[0]; + + SLOT->op1_out[1] = 0; + + if( env < ENV_QUIET ) + { + if (!SLOT->fb_shift) + out = 0; + SLOT->op1_out[1] = op_calc1(SLOT->phase, env, (out<<SLOT->fb_shift), SLOT->wavetable ); + } + + /* SLOT 2 */ + + chip->outchan=0; + + SLOT++; + env = volume_calc(SLOT); + if( env < ENV_QUIET ) + { + signed int outp = op_calc(SLOT->phase, env, phase_modulation, SLOT->wavetable); + chip->output[0] += outp; + chip->outchan = outp; + //chip->output[0] += op_calc(SLOT->phase, env, phase_modulation, SLOT->wavetable); + } +} + +/* + operators used in the rhythm sounds generation process: + + Envelope Generator: + +channel operator register number Bass High Snare Tom Top +/ slot number TL ARDR SLRR Wave Drum Hat Drum Tom Cymbal + 6 / 0 12 50 70 90 f0 + + 6 / 1 15 53 73 93 f3 + + 7 / 0 13 51 71 91 f1 + + 7 / 1 16 54 74 94 f4 + + 8 / 0 14 52 72 92 f2 + + 8 / 1 17 55 75 95 f5 + + + Phase Generator: + +channel operator register number Bass High Snare Tom Top +/ slot number MULTIPLE Drum Hat Drum Tom Cymbal + 6 / 0 12 30 + + 6 / 1 15 33 + + 7 / 0 13 31 + + + + 7 / 1 16 34 ----- n o t u s e d ----- + 8 / 0 14 32 + + 8 / 1 17 35 + + + +channel operator register number Bass High Snare Tom Top +number number BLK/FNUM2 FNUM Drum Hat Drum Tom Cymbal + 6 12,15 B6 A6 + + + 7 13,16 B7 A7 + + + + + 8 14,17 B8 A8 + + + + +*/ + +/* calculate rhythm */ + +INLINE void rhythm_calc( YM2413 *chip, OPLL_CH *CH, unsigned int noise ) +{ + OPLL_SLOT *SLOT; + signed int out; + unsigned int env; + signed int phase_modulation; /* phase modulation input (SLOT 2) */ + + + /* Bass Drum (verified on real YM3812): + - depends on the channel 6 'connect' register: + when connect = 0 it works the same as in normal (non-rhythm) mode (op1->op2->out) + when connect = 1 _only_ operator 2 is present on output (op2->out), operator 1 is ignored + - output sample always is multiplied by 2 + */ + + + /* SLOT 1 */ + SLOT = &CH[6].SLOT[SLOT1]; + env = volume_calc(SLOT); + + out = SLOT->op1_out[0] + SLOT->op1_out[1]; + SLOT->op1_out[0] = SLOT->op1_out[1]; + + phase_modulation = SLOT->op1_out[0]; + + SLOT->op1_out[1] = 0; + if( env < ENV_QUIET ) + { + if (!SLOT->fb_shift) + out = 0; + SLOT->op1_out[1] = op_calc1(SLOT->phase, env, (out<<SLOT->fb_shift), SLOT->wavetable ); + } + + /* SLOT 2 */ + SLOT++; + env = volume_calc(SLOT); + if( env < ENV_QUIET ) + chip->output[1] += op_calc(SLOT->phase, env, phase_modulation, SLOT->wavetable) * 2; + + + /* Phase generation is based on: */ + // HH (13) channel 7->slot 1 combined with channel 8->slot 2 (same combination as TOP CYMBAL but different output phases) + // SD (16) channel 7->slot 1 + // TOM (14) channel 8->slot 1 + // TOP (17) channel 7->slot 1 combined with channel 8->slot 2 (same combination as HIGH HAT but different output phases) + + /* Envelope generation based on: */ + // HH channel 7->slot1 + // SD channel 7->slot2 + // TOM channel 8->slot1 + // TOP channel 8->slot2 + + + /* The following formulas can be well optimized. + I leave them in direct form for now (in case I've missed something). + */ + + /* High Hat (verified on real YM3812) */ + env = volume_calc(SLOT7_1); + if( env < ENV_QUIET ) + { + /* high hat phase generation: + phase = d0 or 234 (based on frequency only) + phase = 34 or 2d0 (based on noise) + */ + + /* base frequency derived from operator 1 in channel 7 */ + unsigned char bit7 = ((SLOT7_1->phase>>FREQ_SH)>>7)&1; + unsigned char bit3 = ((SLOT7_1->phase>>FREQ_SH)>>3)&1; + unsigned char bit2 = ((SLOT7_1->phase>>FREQ_SH)>>2)&1; + + unsigned char res1 = (bit2 ^ bit7) | bit3; + + /* when res1 = 0 phase = 0x000 | 0xd0; */ + /* when res1 = 1 phase = 0x200 | (0xd0>>2); */ + UINT32 phase = res1 ? (0x200|(0xd0>>2)) : 0xd0; + + /* enable gate based on frequency of operator 2 in channel 8 */ + unsigned char bit5e= ((SLOT8_2->phase>>FREQ_SH)>>5)&1; + unsigned char bit3e= ((SLOT8_2->phase>>FREQ_SH)>>3)&1; + + unsigned char res2 = (bit3e | bit5e); + + /* when res2 = 0 pass the phase from calculation above (res1); */ + /* when res2 = 1 phase = 0x200 | (0xd0>>2); */ + if (res2) + phase = (0x200|(0xd0>>2)); + + + /* when phase & 0x200 is set and noise=1 then phase = 0x200|0xd0 */ + /* when phase & 0x200 is set and noise=0 then phase = 0x200|(0xd0>>2), ie no change */ + if (phase&0x200) + { + if (noise) + phase = 0x200|0xd0; + } + else + /* when phase & 0x200 is clear and noise=1 then phase = 0xd0>>2 */ + /* when phase & 0x200 is clear and noise=0 then phase = 0xd0, ie no change */ + { + if (noise) + phase = 0xd0>>2; + } + + chip->output[1] += op_calc(phase<<FREQ_SH, env, 0, SLOT7_1->wavetable) * 2; + } + + /* Snare Drum (verified on real YM3812) */ + env = volume_calc(SLOT7_2); + if( env < ENV_QUIET ) + { + /* base frequency derived from operator 1 in channel 7 */ + unsigned char bit8 = ((SLOT7_1->phase>>FREQ_SH)>>8)&1; + + /* when bit8 = 0 phase = 0x100; */ + /* when bit8 = 1 phase = 0x200; */ + UINT32 phase = bit8 ? 0x200 : 0x100; + + /* Noise bit XOR'es phase by 0x100 */ + /* when noisebit = 0 pass the phase from calculation above */ + /* when noisebit = 1 phase ^= 0x100; */ + /* in other words: phase ^= (noisebit<<8); */ + if (noise) + phase ^= 0x100; + + chip->output[1] += op_calc(phase<<FREQ_SH, env, 0, SLOT7_2->wavetable) * 2; + } + + /* Tom Tom (verified on real YM3812) */ + env = volume_calc(SLOT8_1); + if( env < ENV_QUIET ) + chip->output[1] += op_calc(SLOT8_1->phase, env, 0, SLOT8_1->wavetable) * 2; + + /* Top Cymbal (verified on real YM2413) */ + env = volume_calc(SLOT8_2); + if( env < ENV_QUIET ) + { + /* base frequency derived from operator 1 in channel 7 */ + unsigned char bit7 = ((SLOT7_1->phase>>FREQ_SH)>>7)&1; + unsigned char bit3 = ((SLOT7_1->phase>>FREQ_SH)>>3)&1; + unsigned char bit2 = ((SLOT7_1->phase>>FREQ_SH)>>2)&1; + + unsigned char res1 = (bit2 ^ bit7) | bit3; + + /* when res1 = 0 phase = 0x000 | 0x100; */ + /* when res1 = 1 phase = 0x200 | 0x100; */ + UINT32 phase = res1 ? 0x300 : 0x100; + + /* enable gate based on frequency of operator 2 in channel 8 */ + unsigned char bit5e= ((SLOT8_2->phase>>FREQ_SH)>>5)&1; + unsigned char bit3e= ((SLOT8_2->phase>>FREQ_SH)>>3)&1; + + unsigned char res2 = (bit3e | bit5e); + /* when res2 = 0 pass the phase from calculation above (res1); */ + /* when res2 = 1 phase = 0x200 | 0x100; */ + if (res2) + phase = 0x300; + + chip->output[1] += op_calc(phase<<FREQ_SH, env, 0, SLOT8_2->wavetable) * 2; + } + +} + + +/* generic table initialize */ +static int init_tables(void) +{ + signed int i,x; + signed int n; + double o,m; + + + 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) */ + tl_tab[ x*2 + 0 ] = n; + tl_tab[ x*2 + 1 ] = -tl_tab[ x*2 + 0 ]; + + for (i=1; i<11; 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 ]; + } + #if 0 + logerror("tl %04i", x*2); + for (i=0; i<11; i++) + logerror(", [%02i] %5i", i*2, tl_tab[ x*2 /*+1*/ + i*2*TL_RES_LEN ] ); + logerror("\n"); + #endif + } + /*logerror("ym2413.c: TL_TAB_LEN = %i elements (%i bytes)\n",TL_TAB_LEN, (int)sizeof(tl_tab));*/ + + + 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; + + /* waveform 0: standard sinus */ + sin_tab[ i ] = n*2 + (m>=0.0? 0: 1 ); + + /*logerror("ym2413.c: sin [%4i (hex=%03x)]= %4i (tl_tab value=%5i)\n", i, i, sin_tab[i], tl_tab[sin_tab[i]] );*/ + + + /* waveform 1: __ __ */ + /* / \____/ \____*/ + /* output only first half of the sinus waveform (positive one) */ + if (i & (1<<(SIN_BITS-1)) ) + sin_tab[1*SIN_LEN+i] = TL_TAB_LEN; + else + sin_tab[1*SIN_LEN+i] = sin_tab[i]; + + /*logerror("ym2413.c: sin1[%4i]= %4i (tl_tab value=%5i)\n", i, sin_tab[1*SIN_LEN+i], tl_tab[sin_tab[1*SIN_LEN+i]] );*/ + } +#if 0 + logerror("YM2413.C: ENV_QUIET= %08x (*32=%08x)\n", ENV_QUIET, ENV_QUIET*32 ); + for (i=0; i<ENV_QUIET; i++) + { + logerror("tl_tb[%4x(%4i)]=%8x\n", i<<5, i, tl_tab[i<<5] ); + } +#endif +#ifdef SAVE_SAMPLE + sample[0]=fopen("sampsum.pcm","wb"); +#endif + + return 1; +} + +static void OPLCloseTable( void ) +{ +#ifdef SAVE_SAMPLE + fclose(sample[0]); +#endif +} + + +static void OPLL_init_save(YM2413 *chip, device_t *device) +{ + int chnum; + + device->save_item(NAME(chip->instvol_r)); + device->save_item(NAME(chip->eg_cnt)); + device->save_item(NAME(chip->eg_timer)); + device->save_item(NAME(chip->eg_timer_add)); + device->save_item(NAME(chip->eg_timer_overflow)); + device->save_item(NAME(chip->rhythm)); + device->save_item(NAME(chip->lfo_am_cnt)); + device->save_item(NAME(chip->lfo_am_inc)); + device->save_item(NAME(chip->lfo_pm_cnt)); + device->save_item(NAME(chip->lfo_pm_inc)); + device->save_item(NAME(chip->noise_rng)); + device->save_item(NAME(chip->noise_p)); + device->save_item(NAME(chip->noise_f)); + device->save_item(NAME(chip->inst_tab)); + device->save_item(NAME(chip->address)); + device->save_item(NAME(chip->status)); + + for (chnum = 0; chnum < ARRAY_LENGTH(chip->P_CH); chnum++) + { + OPLL_CH *ch = &chip->P_CH[chnum]; + int slotnum; + + device->save_item(NAME(ch->block_fnum), chnum); + device->save_item(NAME(ch->fc), chnum); + device->save_item(NAME(ch->ksl_base), chnum); + device->save_item(NAME(ch->kcode), chnum); + device->save_item(NAME(ch->sus), chnum); + + for (slotnum = 0; slotnum < ARRAY_LENGTH(ch->SLOT); slotnum++) + { + OPLL_SLOT *sl = &ch->SLOT[slotnum]; + + device->save_item(NAME(sl->ar), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->dr), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->rr), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->KSR), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->ksl), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->ksr), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->mul), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->phase), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->freq), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->fb_shift), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->op1_out), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_type), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->state), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->TL), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->TLL), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->volume), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->sl), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sh_dp), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sel_dp), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sh_ar), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sel_ar), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sh_dr), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sel_dr), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sh_rr), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sel_rr), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sh_rs), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->eg_sel_rs), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->key), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->AMmask), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->vib), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + device->save_item(NAME(sl->wavetable), chnum * ARRAY_LENGTH(ch->SLOT) + slotnum); + } + } +} + + +static void OPLL_initalize(YM2413 *chip, device_t *device) +{ + int i; + + OPLL_init_save(chip, device); + + /* frequency base */ + chip->freqbase = (chip->rate) ? ((double)chip->clock / 72.0) / chip->rate : 0; +#if 0 + chip->rate = (double)chip->clock / 72.0; + chip->freqbase = 1.0; + logerror("freqbase=%f\n", chip->freqbase); +#endif + + + + /* make fnumber -> increment counter table */ + for( i = 0 ; i < 1024; i++ ) + { + /* OPLL (YM2413) phase increment counter = 18bit */ + + chip->fn_tab[i] = (UINT32)( (double)i * 64 * chip->freqbase * (1<<(FREQ_SH-10)) ); /* -10 because chip works with 10.10 fixed point, while we use 16.16 */ +#if 0 + logerror("ym2413.c: fn_tab[%4i] = %08x (dec=%8i)\n", + i, chip->fn_tab[i]>>6, chip->fn_tab[i]>>6 ); +#endif + } + +#if 0 + for( i=0 ; i < 16 ; i++ ) + { + logerror("ym2413.c: sl_tab[%i] = %08x\n", i, sl_tab[i] ); + } + for( i=0 ; i < 8 ; i++ ) + { + int j; + logerror("ym2413.c: ksl_tab[oct=%2i] =",i); + for (j=0; j<16; j++) + { + logerror("%08x ", ksl_tab[i*16+j] ); + } + logerror("\n"); + } +#endif + + + /* Amplitude modulation: 27 output levels (triangle waveform); 1 level takes one of: 192, 256 or 448 samples */ + /* One entry from LFO_AM_TABLE lasts for 64 samples */ + chip->lfo_am_inc = (1.0 / 64.0 ) * (1<<LFO_SH) * chip->freqbase; + + /* Vibrato: 8 output levels (triangle waveform); 1 level takes 1024 samples */ + chip->lfo_pm_inc = (1.0 / 1024.0) * (1<<LFO_SH) * chip->freqbase; + + /*logerror ("chip->lfo_am_inc = %8x ; chip->lfo_pm_inc = %8x\n", chip->lfo_am_inc, chip->lfo_pm_inc);*/ + + /* Noise generator: a step takes 1 sample */ + chip->noise_f = (1.0 / 1.0) * (1<<FREQ_SH) * chip->freqbase; + /*logerror("YM2413init noise_f=%8x\n", chip->noise_f);*/ + + chip->eg_timer_add = (1<<EG_SH) * chip->freqbase; + chip->eg_timer_overflow = ( 1 ) * (1<<EG_SH); + /*logerror("YM2413init eg_timer_add=%8x eg_timer_overflow=%8x\n", chip->eg_timer_add, chip->eg_timer_overflow);*/ +} + +INLINE void KEY_ON(OPLL_SLOT *SLOT, UINT32 key_set) +{ + if( !SLOT->key ) + { + /* do NOT restart Phase Generator (verified on real YM2413)*/ + /* phase -> Dump */ + SLOT->state = EG_DMP; + } + SLOT->key |= key_set; +} + +INLINE void KEY_OFF(OPLL_SLOT *SLOT, UINT32 key_clr) +{ + if( SLOT->key ) + { + SLOT->key &= key_clr; + + if( !SLOT->key ) + { + /* phase -> Release */ + if (SLOT->state>EG_REL) + SLOT->state = EG_REL; + } + } +} + +/* update phase increment counter of operator (also update the EG rates if necessary) */ +INLINE void CALC_FCSLOT(OPLL_CH *CH,OPLL_SLOT *SLOT) +{ + int ksr; + UINT32 SLOT_rs; + UINT32 SLOT_dp; + + /* (frequency) phase increment counter */ + SLOT->freq = CH->fc * SLOT->mul; + ksr = CH->kcode >> SLOT->KSR; + + if( SLOT->ksr != ksr ) + { + SLOT->ksr = ksr; + + /* calculate envelope generator rates */ + if ((SLOT->ar + SLOT->ksr) < 16+62) + { + SLOT->eg_sh_ar = eg_rate_shift [SLOT->ar + SLOT->ksr ]; + SLOT->eg_sel_ar = eg_rate_select[SLOT->ar + SLOT->ksr ]; + } + else + { + SLOT->eg_sh_ar = 0; + SLOT->eg_sel_ar = 13*RATE_STEPS; + } + SLOT->eg_sh_dr = eg_rate_shift [SLOT->dr + SLOT->ksr ]; + SLOT->eg_sel_dr = eg_rate_select[SLOT->dr + SLOT->ksr ]; + SLOT->eg_sh_rr = eg_rate_shift [SLOT->rr + SLOT->ksr ]; + SLOT->eg_sel_rr = eg_rate_select[SLOT->rr + SLOT->ksr ]; + + } + + if (CH->sus) + SLOT_rs = 16 + (5<<2); + else + SLOT_rs = 16 + (7<<2); + + SLOT->eg_sh_rs = eg_rate_shift [SLOT_rs + SLOT->ksr ]; + SLOT->eg_sel_rs = eg_rate_select[SLOT_rs + SLOT->ksr ]; + + SLOT_dp = 16 + (13<<2); + SLOT->eg_sh_dp = eg_rate_shift [SLOT_dp + SLOT->ksr ]; + SLOT->eg_sel_dp = eg_rate_select[SLOT_dp + SLOT->ksr ]; +} + +/* set multi,am,vib,EG-TYP,KSR,mul */ +INLINE void set_mul(YM2413 *chip,int slot,int v) +{ + OPLL_CH *CH = &chip->P_CH[slot/2]; + OPLL_SLOT *SLOT = &CH->SLOT[slot&1]; + + SLOT->mul = mul_tab[v&0x0f]; + SLOT->KSR = (v&0x10) ? 0 : 2; + SLOT->eg_type = (v&0x20); + SLOT->vib = (v&0x40); + SLOT->AMmask = (v&0x80) ? ~0 : 0; + CALC_FCSLOT(CH,SLOT); +} + +/* set ksl, tl */ +INLINE void set_ksl_tl(YM2413 *chip,int chan,int v) +{ + OPLL_CH *CH = &chip->P_CH[chan]; +/* modulator */ + OPLL_SLOT *SLOT = &CH->SLOT[SLOT1]; + + SLOT->ksl = ksl_shift[v >> 6]; + SLOT->TL = (v&0x3f)<<(ENV_BITS-2-7); /* 7 bits TL (bit 6 = always 0) */ + SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); +} + +/* set ksl , waveforms, feedback */ +INLINE void set_ksl_wave_fb(YM2413 *chip,int chan,int v) +{ + OPLL_CH *CH = &chip->P_CH[chan]; +/* modulator */ + OPLL_SLOT *SLOT = &CH->SLOT[SLOT1]; + SLOT->wavetable = ((v&0x08)>>3)*SIN_LEN; + SLOT->fb_shift = (v&7) ? (v&7) + 8 : 0; + +/*carrier*/ + SLOT = &CH->SLOT[SLOT2]; + + SLOT->ksl = ksl_shift[v >> 6]; + SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); + + SLOT->wavetable = ((v&0x10)>>4)*SIN_LEN; +} + +/* set attack rate & decay rate */ +INLINE void set_ar_dr(YM2413 *chip,int slot,int v) +{ + OPLL_CH *CH = &chip->P_CH[slot/2]; + OPLL_SLOT *SLOT = &CH->SLOT[slot&1]; + + SLOT->ar = (v>>4) ? 16 + ((v>>4) <<2) : 0; + + if ((SLOT->ar + SLOT->ksr) < 16+62) + { + SLOT->eg_sh_ar = eg_rate_shift [SLOT->ar + SLOT->ksr ]; + SLOT->eg_sel_ar = eg_rate_select[SLOT->ar + SLOT->ksr ]; + } + else + { + SLOT->eg_sh_ar = 0; + SLOT->eg_sel_ar = 13*RATE_STEPS; + } + + SLOT->dr = (v&0x0f)? 16 + ((v&0x0f)<<2) : 0; + SLOT->eg_sh_dr = eg_rate_shift [SLOT->dr + SLOT->ksr ]; + SLOT->eg_sel_dr = eg_rate_select[SLOT->dr + SLOT->ksr ]; +} + +/* set sustain level & release rate */ +INLINE void set_sl_rr(YM2413 *chip,int slot,int v) +{ + OPLL_CH *CH = &chip->P_CH[slot/2]; + OPLL_SLOT *SLOT = &CH->SLOT[slot&1]; + + SLOT->sl = sl_tab[ v>>4 ]; + + SLOT->rr = (v&0x0f)? 16 + ((v&0x0f)<<2) : 0; + SLOT->eg_sh_rr = eg_rate_shift [SLOT->rr + SLOT->ksr ]; + SLOT->eg_sel_rr = eg_rate_select[SLOT->rr + SLOT->ksr ]; +} + +static void load_instrument(YM2413 *chip, UINT32 chan, UINT32 slot, UINT8* inst ) +{ + set_mul (chip, slot, inst[0]); + set_mul (chip, slot+1, inst[1]); + set_ksl_tl (chip, chan, inst[2]); + set_ksl_wave_fb (chip, chan, inst[3]); + set_ar_dr (chip, slot, inst[4]); + set_ar_dr (chip, slot+1, inst[5]); + set_sl_rr (chip, slot, inst[6]); + set_sl_rr (chip, slot+1, inst[7]); +} +static void update_instrument_zero(YM2413 *chip, UINT8 r ) +{ + UINT8* inst = &chip->inst_tab[0][0]; /* point to user instrument */ + UINT32 chan; + UINT32 chan_max; + + chan_max = 9; + if (chip->rhythm & 0x20) + chan_max=6; + + switch(r) + { + case 0: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_mul (chip, chan*2, inst[0]); + } + } + break; + case 1: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_mul (chip, chan*2+1,inst[1]); + } + } + break; + case 2: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_ksl_tl (chip, chan, inst[2]); + } + } + break; + case 3: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_ksl_wave_fb (chip, chan, inst[3]); + } + } + break; + case 4: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_ar_dr (chip, chan*2, inst[4]); + } + } + break; + case 5: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_ar_dr (chip, chan*2+1,inst[5]); + } + } + break; + case 6: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_sl_rr (chip, chan*2, inst[6]); + } + } + break; + case 7: + for (chan=0; chan<chan_max; chan++) + { + if ((chip->instvol_r[chan]&0xf0)==0) + { + set_sl_rr (chip, chan*2+1,inst[7]); + } + } + break; + } +} + +/* write a value v to register r on chip chip */ +static void OPLLWriteReg(YM2413 *chip, int r, int v) +{ + OPLL_CH *CH; + OPLL_SLOT *SLOT; + UINT8 *inst; + int chan; + int slot; + + /* adjust bus to 8 bits */ + r &= 0xff; + v &= 0xff; + + + if (LOG_CYM_FILE && (cymfile) && (r!=8) ) + { + fputc( (unsigned char)r, cymfile ); + fputc( (unsigned char)v, cymfile ); + } + + + switch(r&0xf0) + { + case 0x00: /* 00-0f:control */ + { + switch(r&0x0f) + { + case 0x00: /* AM/VIB/EGTYP/KSR/MULTI (modulator) */ + case 0x01: /* AM/VIB/EGTYP/KSR/MULTI (carrier) */ + case 0x02: /* Key Scale Level, Total Level (modulator) */ + case 0x03: /* Key Scale Level, carrier waveform, modulator waveform, Feedback */ + case 0x04: /* Attack, Decay (modulator) */ + case 0x05: /* Attack, Decay (carrier) */ + case 0x06: /* Sustain, Release (modulator) */ + case 0x07: /* Sustain, Release (carrier) */ + chip->inst_tab[0][r & 0x07] = v; + update_instrument_zero(chip,r&7); + break; + + case 0x0e: /* x, x, r,bd,sd,tom,tc,hh */ + { + if(v&0x20) + { + if ((chip->rhythm&0x20)==0) + /*rhythm off to on*/ + { + chip->device->logerror("YM2413: Rhythm mode enable\n"); + + /* Load instrument settings for channel seven(chan=6 since we're zero based). (Bass drum) */ + chan = 6; + inst = &chip->inst_tab[16][0]; + slot = chan*2; + + load_instrument(chip, chan, slot, inst); + + /* Load instrument settings for channel eight. (High hat and snare drum) */ + chan = 7; + inst = &chip->inst_tab[17][0]; + slot = chan*2; + + load_instrument(chip, chan, slot, inst); + + CH = &chip->P_CH[chan]; + SLOT = &CH->SLOT[SLOT1]; /* modulator envelope is HH */ + SLOT->TL = ((chip->instvol_r[chan]>>4)<<2)<<(ENV_BITS-2-7); /* 7 bits TL (bit 6 = always 0) */ + SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); + + /* Load instrument settings for channel nine. (Tom-tom and top cymbal) */ + chan = 8; + inst = &chip->inst_tab[18][0]; + slot = chan*2; + + load_instrument(chip, chan, slot, inst); + + CH = &chip->P_CH[chan]; + SLOT = &CH->SLOT[SLOT1]; /* modulator envelope is TOM */ + SLOT->TL = ((chip->instvol_r[chan]>>4)<<2)<<(ENV_BITS-2-7); /* 7 bits TL (bit 6 = always 0) */ + SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); + } + /* BD key on/off */ + if(v&0x10) + { + KEY_ON (&chip->P_CH[6].SLOT[SLOT1], 2); + KEY_ON (&chip->P_CH[6].SLOT[SLOT2], 2); + } + else + { + KEY_OFF(&chip->P_CH[6].SLOT[SLOT1],~2); + KEY_OFF(&chip->P_CH[6].SLOT[SLOT2],~2); + } + /* HH key on/off */ + if(v&0x01) KEY_ON (&chip->P_CH[7].SLOT[SLOT1], 2); + else KEY_OFF(&chip->P_CH[7].SLOT[SLOT1],~2); + /* SD key on/off */ + if(v&0x08) KEY_ON (&chip->P_CH[7].SLOT[SLOT2], 2); + else KEY_OFF(&chip->P_CH[7].SLOT[SLOT2],~2); + /* TOM key on/off */ + if(v&0x04) KEY_ON (&chip->P_CH[8].SLOT[SLOT1], 2); + else KEY_OFF(&chip->P_CH[8].SLOT[SLOT1],~2); + /* TOP-CY key on/off */ + if(v&0x02) KEY_ON (&chip->P_CH[8].SLOT[SLOT2], 2); + else KEY_OFF(&chip->P_CH[8].SLOT[SLOT2],~2); + } + else + { + if (chip->rhythm&0x20) + /*rhythm on to off*/ + { + chip->device->logerror("YM2413: Rhythm mode disable\n"); + /* Load instrument settings for channel seven(chan=6 since we're zero based).*/ + chan = 6; + inst = &chip->inst_tab[chip->instvol_r[chan]>>4][0]; + slot = chan*2; + + load_instrument(chip, chan, slot, inst); + + /* Load instrument settings for channel eight.*/ + chan = 7; + inst = &chip->inst_tab[chip->instvol_r[chan]>>4][0]; + slot = chan*2; + + load_instrument(chip, chan, slot, inst); + + /* Load instrument settings for channel nine.*/ + chan = 8; + inst = &chip->inst_tab[chip->instvol_r[chan]>>4][0]; + slot = chan*2; + + load_instrument(chip, chan, slot, inst); + } + /* BD key off */ + KEY_OFF(&chip->P_CH[6].SLOT[SLOT1],~2); + KEY_OFF(&chip->P_CH[6].SLOT[SLOT2],~2); + /* HH key off */ + KEY_OFF(&chip->P_CH[7].SLOT[SLOT1],~2); + /* SD key off */ + KEY_OFF(&chip->P_CH[7].SLOT[SLOT2],~2); + /* TOM key off */ + KEY_OFF(&chip->P_CH[8].SLOT[SLOT1],~2); + /* TOP-CY off */ + KEY_OFF(&chip->P_CH[8].SLOT[SLOT2],~2); + } + chip->rhythm = v&0x3f; + } + break; + } + } + break; + + case 0x10: + case 0x20: + { + int block_fnum; + + chan = r&0x0f; + + if (chan >= 9) + chan -= 9; /* verified on real YM2413 */ + + CH = &chip->P_CH[chan]; + + if(r&0x10) + { /* 10-18: FNUM 0-7 */ + block_fnum = (CH->block_fnum&0x0f00) | v; + } + else + { /* 20-28: suson, keyon, block, FNUM 8 */ + block_fnum = ((v&0x0f)<<8) | (CH->block_fnum&0xff); + + if(v&0x10) + { + KEY_ON (&CH->SLOT[SLOT1], 1); + KEY_ON (&CH->SLOT[SLOT2], 1); + } + else + { + KEY_OFF(&CH->SLOT[SLOT1],~1); + KEY_OFF(&CH->SLOT[SLOT2],~1); + } + + + if (CH->sus!=(v&0x20)) + chip->device->logerror("chan=%i sus=%2x\n",chan,v&0x20); + + CH->sus = v & 0x20; + } + /* update */ + if(CH->block_fnum != block_fnum) + { + UINT8 block; + + CH->block_fnum = block_fnum; + + /* BLK 2,1,0 bits -> bits 3,2,1 of kcode, FNUM MSB -> kcode LSB */ + CH->kcode = (block_fnum&0x0f00)>>8; + + CH->ksl_base = ksl_tab[block_fnum>>5]; + + block_fnum = block_fnum * 2; + block = (block_fnum&0x1c00) >> 10; + CH->fc = chip->fn_tab[block_fnum&0x03ff] >> (7-block); + + /* refresh Total Level in both SLOTs of this channel */ + CH->SLOT[SLOT1].TLL = CH->SLOT[SLOT1].TL + (CH->ksl_base>>CH->SLOT[SLOT1].ksl); + CH->SLOT[SLOT2].TLL = CH->SLOT[SLOT2].TL + (CH->ksl_base>>CH->SLOT[SLOT2].ksl); + + /* refresh frequency counter in both SLOTs of this channel */ + CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); + CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); + } + } + break; + + case 0x30: /* inst 4 MSBs, VOL 4 LSBs */ + { + UINT8 old_instvol; + + chan = r&0x0f; + + if (chan >= 9) + chan -= 9; /* verified on real YM2413 */ + + old_instvol = chip->instvol_r[chan]; + chip->instvol_r[chan] = v; /* store for later use */ + + CH = &chip->P_CH[chan]; + SLOT = &CH->SLOT[SLOT2]; /* carrier */ + SLOT->TL = ((v&0x0f)<<2)<<(ENV_BITS-2-7); /* 7 bits TL (bit 6 = always 0) */ + SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); + + + /*check whether we are in rhythm mode and handle instrument/volume register accordingly*/ + if ((chan>=6) && (chip->rhythm&0x20)) + { + /* we're in rhythm mode*/ + + if (chan>=7) /* only for channel 7 and 8 (channel 6 is handled in usual way)*/ + { + SLOT = &CH->SLOT[SLOT1]; /* modulator envelope is HH(chan=7) or TOM(chan=8) */ + SLOT->TL = ((chip->instvol_r[chan]>>4)<<2)<<(ENV_BITS-2-7); /* 7 bits TL (bit 6 = always 0) */ + SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); + } + } + else + { + if ( (old_instvol&0xf0) == (v&0xf0) ) + return; + + inst = &chip->inst_tab[chip->instvol_r[chan]>>4][0]; + slot = chan*2; + + load_instrument(chip, chan, slot, inst); + + #if 0 + logerror("YM2413: chan#%02i inst=%02i: (r=%2x, v=%2x)\n",chan,v>>4,r,v); + logerror(" 0:%2x 1:%2x\n",inst[0],inst[1]); logerror(" 2:%2x 3:%2x\n",inst[2],inst[3]); + logerror(" 4:%2x 5:%2x\n",inst[4],inst[5]); logerror(" 6:%2x 7:%2x\n",inst[6],inst[7]); + #endif + } + } + break; + + default: + break; + } +} + +static TIMER_CALLBACK( cymfile_callback ) +{ + if (cymfile) + { + fputc( (unsigned char)8, cymfile ); + } +} + +/* lock/unlock for common table */ +static int OPLL_LockTable(device_t *device) +{ + num_lock++; + if(num_lock>1) return 0; + + /* first time */ + + /* allocate total level table (128kb space) */ + if( !init_tables() ) + { + num_lock--; + return -1; + } + + if (LOG_CYM_FILE) + { + cymfile = fopen("2413_.cym","wb"); + if (cymfile) + device->machine().scheduler().timer_pulse ( attotime::from_hz(110), FUNC(cymfile_callback)); /*110 Hz pulse timer*/ + else + device->logerror("Could not create file 2413_.cym\n"); + } + + return 0; +} + +static void OPLL_UnLockTable(void) +{ + if(num_lock) num_lock--; + if(num_lock) return; + + /* last time */ + + OPLCloseTable(); + + if (cymfile) + fclose (cymfile); + cymfile = NULL; +} + +static void OPLLResetChip(YM2413 *chip) +{ + int c,s; + int i; + + chip->eg_timer = 0; + chip->eg_cnt = 0; + + chip->noise_rng = 1; /* noise shift register */ + + + /* setup instruments table */ + for (i=0; i<19; i++) + { + for (c=0; c<8; c++) + { + chip->inst_tab[i][c] = table[i][c]; + } + } + + + /* reset with register write */ + OPLLWriteReg(chip,0x0f,0); /*test reg*/ + for(i = 0x3f ; i >= 0x10 ; i-- ) OPLLWriteReg(chip,i,0x00); + + /* reset operator parameters */ + for( c = 0 ; c < 9 ; c++ ) + { + OPLL_CH *CH = &chip->P_CH[c]; + for(s = 0 ; s < 2 ; s++ ) + { + /* wave table */ + CH->SLOT[s].wavetable = 0; + CH->SLOT[s].state = EG_OFF; + CH->SLOT[s].volume = MAX_ATT_INDEX; + } + } +} + +/* Create one of virtual YM2413 */ +/* 'clock' is chip clock in Hz */ +/* 'rate' is sampling rate */ +static YM2413 *OPLLCreate(device_t *device, int clock, int rate) +{ + YM2413 *chip; + + if (OPLL_LockTable(device) == -1) return NULL; + + /* allocate memory block */ + chip = auto_alloc_clear(device->machine(), YM2413); + + chip->device = device; + chip->clock = clock; + chip->rate = rate; + + /* init global tables */ + OPLL_initalize(chip, device); + + /* reset chip */ + OPLLResetChip(chip); + return chip; +} + +/* Destroy one of virtual YM3812 */ +static void OPLLDestroy(YM2413 *chip) +{ + OPLL_UnLockTable(); + auto_free(chip->device->machine(), chip); +} + +/* Option handlers */ + +static void OPLLSetUpdateHandler(YM2413 *chip,OPLL_UPDATEHANDLER UpdateHandler,void * param) +{ + chip->UpdateHandler = UpdateHandler; + chip->UpdateParam = param; +} + +/* YM3812 I/O interface */ +static void OPLLWrite(YM2413 *chip,int a,int v) +{ + if( !(a&1) ) + { /* address port */ + chip->address = v & 0xff; + } + else + { /* data port */ + if(chip->UpdateHandler) chip->UpdateHandler(chip->UpdateParam,0); + OPLLWriteReg(chip,chip->address,v); + } +} + +static unsigned char OPLLRead(YM2413 *chip,int a) +{ + if( !(a&1) ) + { + /* status port */ + return chip->status; + } + return 0xff; +} + + + + + +void * ym2413_init(device_t *device, int clock, int rate) +{ + /* emulator create */ + return OPLLCreate(device, clock, rate); +} + +void ym2413_shutdown(void *chip) +{ + YM2413 *OPLL = (YM2413 *)chip; + + /* emulator shutdown */ + OPLLDestroy(OPLL); +} + +void ym2413_reset_chip(void *chip) +{ + YM2413 *OPLL = (YM2413 *)chip; + OPLLResetChip(OPLL); +} + +void ym2413_write(void *chip, int a, int v) +{ + YM2413 *OPLL = (YM2413 *)chip; + OPLLWrite(OPLL, a, v); +} + +unsigned char ym2413_read(void *chip, int a) +{ + YM2413 *OPLL = (YM2413 *)chip; + return OPLLRead(OPLL, a) & 0x03 ; +} + +void ym2413_set_update_handler(void *chip,OPLL_UPDATEHANDLER UpdateHandler,void *param) +{ + YM2413 *OPLL = (YM2413 *)chip; + OPLLSetUpdateHandler(OPLL, UpdateHandler, param); +} + + +/* +** Generate samples for one of the YM2413's +** +** 'which' is the virtual YM2413 number +** '*buffer' is the output buffer pointer +** 'length' is the number of samples that should be generated +*/ +void ym2413_update_one(void *_chip, SAMP **buffers, int length) +{ + YM2413 *chip = (YM2413 *)_chip; + UINT8 rhythm = chip->rhythm&0x20; + SAMP *bufMO = buffers[0]; + SAMP *bufRO = buffers[1]; + + int i; + + for( i=0; i < length ; i++ ) + { + int mo,ro; + + chip->output[0] = 0; + chip->output[1] = 0; + + advance_lfo(chip); + + /* FM part */ + chan_calc(chip, &chip->P_CH[0]); +//SAVE_SEPARATE_CHANNEL(0); + chan_calc(chip, &chip->P_CH[1]); + chan_calc(chip, &chip->P_CH[2]); + chan_calc(chip, &chip->P_CH[3]); + chan_calc(chip, &chip->P_CH[4]); + chan_calc(chip, &chip->P_CH[5]); + + if(!rhythm) + { + chan_calc(chip, &chip->P_CH[6]); + chan_calc(chip, &chip->P_CH[7]); + chan_calc(chip, &chip->P_CH[8]); + } + else /* Rhythm part */ + { + rhythm_calc(chip, &chip->P_CH[0], (chip->noise_rng>>0)&1 ); + } + + mo = chip->output[0]; + ro = chip->output[1]; + + mo >>= FINAL_SH; + ro >>= FINAL_SH; + + /* limit check */ + mo = limit( mo , MAXOUT, MINOUT ); + ro = limit( ro , MAXOUT, MINOUT ); + + #ifdef SAVE_SAMPLE + if (which==0) + { + SAVE_ALL_CHANNELS + } + #endif + + /* store to sound buffer */ + bufMO[i] = mo; + bufRO[i] = ro; + + advance(chip); + } + +} |