Mercurial > repos > blastem
annotate ym2612.c @ 900:30efd12b1be1
Replace some hard-coded instruction length assumptions with a calculation so they will work properly on both 32-bit and 64-bit hosts
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Fri, 27 Nov 2015 10:47:35 -0800 |
| parents | 252dfd29831d |
| children | 0ee8cfcc06d1 |
| rev | line source |
|---|---|
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1 /* |
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2 Copyright 2013 Michael Pavone |
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3 This file is part of BlastEm. |
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
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5 */ |
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6 #include <string.h> |
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7 #include <math.h> |
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8 #include <stdio.h> |
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9 #include <stdlib.h> |
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10 #include "ym2612.h" |
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11 #include "render.h" |
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12 #include "wave.h" |
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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13 #include "blastem.h" |
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14 |
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15 //#define DO_DEBUG_PRINT |
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16 #ifdef DO_DEBUG_PRINT |
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17 #define dfprintf fprintf |
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18 #define dfopen(var, fname, mode) var=fopen(fname, mode) |
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19 #else |
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20 #define dfprintf |
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21 #define dfopen(var, fname, mode) |
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22 #endif |
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23 |
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24 #define BUSY_CYCLES_ADDRESS 17 |
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25 #define BUSY_CYCLES_DATA_LOW 83 |
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26 #define BUSY_CYCLES_DATA_HIGH 47 |
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27 #define OP_UPDATE_PERIOD 144 |
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28 |
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29 #define BIT_TIMERA_ENABLE 0x1 |
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30 #define BIT_TIMERB_ENABLE 0x2 |
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31 #define BIT_TIMERA_OVEREN 0x4 |
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32 #define BIT_TIMERB_OVEREN 0x8 |
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33 #define BIT_TIMERA_RESET 0x10 |
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34 #define BIT_TIMERB_RESET 0x20 |
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35 |
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36 #define BIT_TIMERA_LOAD 0x40 |
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37 #define BIT_TIMERB_LOAD 0x80 |
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38 |
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39 #define BIT_STATUS_TIMERA 0x1 |
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40 #define BIT_STATUS_TIMERB 0x2 |
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41 |
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42 enum { |
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43 PHASE_ATTACK, |
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44 PHASE_DECAY, |
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45 PHASE_SUSTAIN, |
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46 PHASE_RELEASE |
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47 }; |
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48 |
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49 uint8_t did_tbl_init = 0; |
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50 //According to Nemesis, real hardware only uses a 256 entry quarter sine table; however, |
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51 //memory is cheap so using a half sine table will probably save some cycles |
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52 //a full sine table would be nice, but negative numbers don't get along with log2 |
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53 #define SINE_TABLE_SIZE 512 |
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54 uint16_t sine_table[SINE_TABLE_SIZE]; |
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55 //Similar deal here with the power table for log -> linear conversion |
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56 //According to Nemesis, real hardware only uses a 256 entry table for the fractional part |
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57 //and uses the whole part as a shift amount. |
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58 #define POW_TABLE_SIZE (1 << 13) |
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59 uint16_t pow_table[POW_TABLE_SIZE]; |
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60 |
| 362 | 61 uint16_t rate_table_base[] = { |
| 62 //main portion | |
| 63 0,1,0,1,0,1,0,1, | |
| 64 0,1,0,1,1,1,0,1, | |
| 65 0,1,1,1,0,1,1,1, | |
| 66 0,1,1,1,1,1,1,1, | |
| 67 //top end | |
| 68 1,1,1,1,1,1,1,1, | |
| 69 1,1,1,2,1,1,1,2, | |
| 70 1,2,1,2,1,2,1,2, | |
| 71 1,2,2,2,1,2,2,2, | |
| 72 }; | |
| 73 | |
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74 uint16_t rate_table[64*8]; |
| 362 | 75 |
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76 uint8_t lfo_timer_values[] = {108, 77, 71, 67, 62, 44, 8, 5}; |
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77 uint8_t lfo_pm_base[][8] = { |
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78 {0, 0, 0, 0, 0, 0, 0, 0}, |
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79 {0, 0, 0, 0, 4, 4, 4, 4}, |
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80 {0, 0, 0, 4, 4, 4, 8, 8}, |
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81 {0, 0, 4, 4, 8, 8, 0xc, 0xc}, |
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82 {0, 0, 4, 8, 8, 8, 0xc,0x10}, |
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83 {0, 0, 8, 0xc,0x10,0x10,0x14,0x18}, |
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84 {0, 0,0x10,0x18,0x20,0x20,0x28,0x30}, |
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85 {0, 0,0x20,0x30,0x40,0x40,0x50,0x60} |
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86 }; |
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87 int16_t lfo_pm_table[128 * 32 * 8]; |
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88 |
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89 uint16_t ams_shift[] = {8, 3, 1, 0}; |
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90 |
| 362 | 91 #define MAX_ENVELOPE 0xFFC |
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92 #define YM_DIVIDER 2 |
| 374 | 93 #define CYCLE_NEVER 0xFFFFFFFF |
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94 |
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95 uint16_t round_fixed_point(double value, int dec_bits) |
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96 { |
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97 return value * (1 << dec_bits) + 0.5; |
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98 } |
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99 |
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100 FILE * debug_file = NULL; |
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101 uint32_t first_key_on=0; |
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102 |
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103 ym2612_context * log_context = NULL; |
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104 |
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105 void ym_finalize_log() |
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106 { |
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107 if (!log_context) { |
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108 return; |
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109 } |
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110 for (int i = 0; i < NUM_CHANNELS; i++) { |
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111 if (log_context->channels[i].logfile) { |
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112 wave_finalize(log_context->channels[i].logfile); |
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113 } |
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114 } |
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115 log_context = NULL; |
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116 } |
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117 #define BUFFER_INC_RES 1000000000UL |
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118 |
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119 void ym_adjust_master_clock(ym2612_context * context, uint32_t master_clock) |
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120 { |
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121 uint64_t old_inc = context->buffer_inc; |
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122 context->buffer_inc = ((BUFFER_INC_RES * (uint64_t)context->sample_rate) / (uint64_t)master_clock) * (uint64_t)context->clock_inc; |
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123 } |
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124 |
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125 #ifdef __ANDROID__ |
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126 #define log2(x) (log(x)/log(2)) |
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127 #endif |
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128 |
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129 void ym_init(ym2612_context * context, uint32_t sample_rate, uint32_t master_clock, uint32_t clock_div, uint32_t sample_limit, uint32_t options) |
|
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130 { |
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131 static uint8_t registered_finalize; |
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132 dfopen(debug_file, "ym_debug.txt", "w"); |
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133 memset(context, 0, sizeof(*context)); |
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134 context->audio_buffer = malloc(sizeof(*context->audio_buffer) * sample_limit*2); |
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135 context->back_buffer = malloc(sizeof(*context->audio_buffer) * sample_limit*2); |
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136 context->sample_rate = sample_rate; |
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137 context->clock_inc = clock_div * 6; |
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138 ym_adjust_master_clock(context, master_clock); |
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139 |
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140 context->sample_limit = sample_limit*2; |
| 374 | 141 context->write_cycle = CYCLE_NEVER; |
| 362 | 142 for (int i = 0; i < NUM_OPERATORS; i++) { |
| 143 context->operators[i].envelope = MAX_ENVELOPE; | |
| 144 context->operators[i].env_phase = PHASE_RELEASE; | |
| 145 } | |
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146 //some games seem to expect that the LR flags start out as 1 |
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147 for (int i = 0; i < NUM_CHANNELS; i++) { |
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148 context->channels[i].lr = 0xC0; |
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149 if (options & YM_OPT_WAVE_LOG) { |
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150 char fname[64]; |
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151 sprintf(fname, "ym_channel_%d.wav", i); |
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152 FILE * f = context->channels[i].logfile = fopen(fname, "wb"); |
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153 if (!f) { |
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154 fprintf(stderr, "Failed to open WAVE log file %s for writing\n", fname); |
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155 continue; |
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156 } |
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157 if (!wave_init(f, sample_rate, 16, 1)) { |
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158 fclose(f); |
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159 context->channels[i].logfile = NULL; |
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160 } |
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161 } |
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162 } |
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163 if (options & YM_OPT_WAVE_LOG) { |
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164 log_context = context; |
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165 if (!registered_finalize) { |
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166 atexit(ym_finalize_log); |
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167 registered_finalize = 1; |
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168 } |
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169 } |
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170 if (!did_tbl_init) { |
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171 //populate sine table |
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172 for (int32_t i = 0; i < 512; i++) { |
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173 double sine = sin( ((double)(i*2+1) / SINE_TABLE_SIZE) * M_PI_2 ); |
|
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174 |
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175 //table stores 4.8 fixed pointed representation of the base 2 log |
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176 sine_table[i] = round_fixed_point(-log2(sine), 8); |
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177 } |
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178 //populate power table |
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179 for (int32_t i = 0; i < POW_TABLE_SIZE; i++) { |
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180 double linear = pow(2, -((double)((i & 0xFF)+1) / 256.0)); |
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181 int32_t tmp = round_fixed_point(linear, 11); |
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182 int32_t shift = (i >> 8) - 2; |
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183 if (shift < 0) { |
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184 tmp <<= 0-shift; |
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185 } else { |
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186 tmp >>= shift; |
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187 } |
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188 pow_table[i] = tmp; |
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189 } |
| 362 | 190 //populate envelope generator rate table, from small base table |
| 191 for (int rate = 0; rate < 64; rate++) { | |
|
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192 for (int cycle = 0; cycle < 8; cycle++) { |
| 362 | 193 uint16_t value; |
|
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194 if (rate < 2) { |
| 362 | 195 value = 0; |
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196 } else if (rate >= 60) { |
| 362 | 197 value = 8; |
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198 } else if (rate < 8) { |
|
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199 value = rate_table_base[((rate & 6) == 6 ? 16 : 0) + cycle]; |
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200 } else if (rate < 48) { |
| 362 | 201 value = rate_table_base[(rate & 0x3) * 8 + cycle]; |
| 202 } else { | |
|
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203 value = rate_table_base[32 + (rate & 0x3) * 8 + cycle] << ((rate - 48) >> 2); |
| 362 | 204 } |
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205 rate_table[rate * 8 + cycle] = value; |
| 362 | 206 } |
| 207 } | |
|
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208 //populate LFO PM table from small base table |
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209 //seems like there must be a better way to derive this |
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210 for (int freq = 0; freq < 128; freq++) { |
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211 for (int pms = 0; pms < 8; pms++) { |
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212 for (int step = 0; step < 32; step++) { |
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213 int16_t value = 0; |
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214 for (int bit = 0x40, shift = 0; bit > 0; bit >>= 1, shift++) { |
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215 if (freq & bit) { |
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216 value += lfo_pm_base[pms][(step & 0x8) ? 7-step & 7 : step & 7] >> shift; |
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217 } |
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218 } |
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219 if (step & 0x10) { |
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220 value = -value; |
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221 } |
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222 lfo_pm_table[freq * 256 + pms * 32 + step] = value; |
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223 } |
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224 } |
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225 } |
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226 } |
|
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227 } |
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228 |
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229 void ym_free(ym2612_context *context) |
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230 { |
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231 if (context == log_context) { |
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232 ym_finalize_log(); |
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233 } |
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234 free(context->audio_buffer); |
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235 //TODO: Figure out how to make this 100% safe |
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236 //audio thread could still be using this |
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237 free(context->back_buffer); |
|
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238 free(context); |
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239 } |
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240 |
|
522
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241 #define YM_VOLUME_MULTIPLIER 2 |
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242 #define YM_VOLUME_DIVIDER 3 |
|
381
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243 #define YM_MOD_SHIFT 1 |
|
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244 |
| 403 | 245 #define TIMER_A_MAX 1023 |
|
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246 #define TIMER_B_MAX 255 |
| 403 | 247 |
|
288
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248 void ym_run(ym2612_context * context, uint32_t to_cycle) |
|
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249 { |
| 362 | 250 //printf("Running YM2612 from cycle %d to cycle %d\n", context->current_cycle, to_cycle); |
| 251 //TODO: Fix channel update order OR remap channels in register write | |
|
380
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Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
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252 for (; context->current_cycle < to_cycle; context->current_cycle += context->clock_inc) { |
|
359
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253 //Update timers at beginning of 144 cycle period |
| 403 | 254 if (!context->current_op) { |
| 255 if (context->timer_control & BIT_TIMERA_ENABLE) { | |
| 256 if (context->timer_a != TIMER_A_MAX) { | |
| 257 context->timer_a++; | |
| 258 } else { | |
|
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259 if (context->timer_control & BIT_TIMERA_LOAD) { |
|
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260 context->timer_control &= ~BIT_TIMERA_LOAD; |
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261 } else if (context->timer_control & BIT_TIMERA_OVEREN) { |
| 403 | 262 context->status |= BIT_STATUS_TIMERA; |
| 263 } | |
| 264 context->timer_a = context->timer_a_load; | |
|
359
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265 } |
|
288
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266 } |
|
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267 if (!context->sub_timer_b) { |
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268 if (context->timer_control & BIT_TIMERB_ENABLE) { |
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269 if (context->timer_b != TIMER_B_MAX) { |
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270 context->timer_b++; |
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271 } else { |
|
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Michael Pavone <pavone@retrodev.com>
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272 if (context->timer_control & BIT_TIMERB_LOAD) { |
|
3a18b5f63afc
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273 context->timer_control &= ~BIT_TIMERB_LOAD; |
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274 } else if (context->timer_control & BIT_TIMERB_OVEREN) { |
|
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275 context->status |= BIT_STATUS_TIMERB; |
|
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Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
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276 } |
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Michael Pavone <pavone@retrodev.com>
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diff
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277 context->timer_b = context->timer_b_load; |
|
359
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278 } |
|
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279 } |
|
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diff
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280 } |
|
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|
281 context->sub_timer_b += 0x10; |
|
740
25c9e9d39997
Fix LFO counter update speed and implement amplitude modulation
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282 //Update LFO |
|
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283 if (context->lfo_enable) { |
|
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Fix LFO counter update speed and implement amplitude modulation
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284 if (context->lfo_counter) { |
|
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285 context->lfo_counter--; |
|
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286 } else { |
|
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287 context->lfo_counter = lfo_timer_values[context->lfo_freq]; |
|
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288 context->lfo_am_step += 2; |
|
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289 context->lfo_am_step &= 0xFE; |
|
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290 context->lfo_pm_step = context->lfo_am_step / 8; |
|
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291 } |
|
411
baf4688901f2
Initial stab at LFO phase modulation
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292 } |
|
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Initial stab at LFO phase modulation
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293 } |
|
359
cc39629e8d06
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diff
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294 //Update Envelope Generator |
|
364
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362
diff
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295 if (!(context->current_op % 3)) { |
|
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296 uint32_t env_cyc = context->env_counter; |
|
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diff
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297 uint32_t op = context->current_env_op; |
| 362 | 298 ym_operator * operator = context->operators + op; |
| 299 ym_channel * channel = context->channels + op/4; | |
|
359
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300 uint8_t rate; |
| 362 | 301 for(;;) { |
| 302 rate = operator->rates[operator->env_phase]; | |
| 303 if (rate) { | |
| 304 uint8_t ks = channel->keycode >> operator->key_scaling;; | |
| 305 rate = rate*2 + ks; | |
| 306 if (rate > 63) { | |
| 307 rate = 63; | |
| 308 } | |
| 309 } | |
| 310 //Deal with "infinite" rates | |
|
370
5f215603d001
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diff
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311 //According to Nemesis this should be handled in key-on instead |
|
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312 if (rate >= 62 && operator->env_phase == PHASE_ATTACK) { |
|
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diff
changeset
|
313 operator->env_phase = PHASE_DECAY; |
|
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changeset
|
314 operator->envelope = 0; |
| 362 | 315 } else { |
| 316 break; | |
| 317 } | |
| 318 } | |
| 319 uint32_t cycle_shift = rate < 0x30 ? ((0x2F - rate) >> 2) : 0; | |
|
370
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
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diff
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|
320 if (first_key_on) { |
|
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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|
321 dfprintf(debug_file, "Operator: %d, env rate: %d (2*%d+%d), env_cyc: %d, cycle_shift: %d, env_cyc & ((1 << cycle_shift) - 1): %d\n", op, rate, operator->rates[operator->env_phase], channel->keycode >> operator->key_scaling,env_cyc, cycle_shift, env_cyc & ((1 << cycle_shift) - 1)); |
|
5f215603d001
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|
322 } |
| 362 | 323 if (!(env_cyc & ((1 << cycle_shift) - 1))) { |
| 324 uint32_t update_cycle = env_cyc >> cycle_shift & 0x7; | |
|
852
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Fix some bugs in the attack phase and sustain level in the envelope generator
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diff
changeset
|
325 uint16_t envelope_inc = rate_table[rate * 8 + update_cycle]; |
| 362 | 326 if (operator->env_phase == PHASE_ATTACK) { |
| 327 //this can probably be optimized to a single shift rather than a multiply + shift | |
|
370
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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changeset
|
328 if (first_key_on) { |
|
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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diff
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329 dfprintf(debug_file, "Changing op %d envelope %d by %d(%d * %d) in attack phase\n", op, operator->envelope, (~operator->envelope * envelope_inc) >> 4, ~operator->envelope, envelope_inc); |
|
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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|
330 } |
|
513
24ebabd89162
Properly clamp envelope value to zero when it overflows during the attack phase. This fixes a number of instruments that sounded rather wrong as well as the missing melody line from Mushroom Hill Zone in Sonic and Knuckles
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|
331 uint16_t old_env = operator->envelope; |
|
852
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parents:
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diff
changeset
|
332 operator->envelope += ((~operator->envelope * envelope_inc) >> 4) & 0xFFFFFFFC; |
|
513
24ebabd89162
Properly clamp envelope value to zero when it overflows during the attack phase. This fixes a number of instruments that sounded rather wrong as well as the missing melody line from Mushroom Hill Zone in Sonic and Knuckles
Michael Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
333 if (operator->envelope > old_env) { |
|
24ebabd89162
Properly clamp envelope value to zero when it overflows during the attack phase. This fixes a number of instruments that sounded rather wrong as well as the missing melody line from Mushroom Hill Zone in Sonic and Knuckles
Michael Pavone <pavone@retrodev.com>
parents:
505
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changeset
|
334 //Handle overflow |
|
24ebabd89162
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Michael Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
335 operator->envelope = 0; |
|
24ebabd89162
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Michael Pavone <pavone@retrodev.com>
parents:
505
diff
changeset
|
336 } |
|
370
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
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|
337 if (!operator->envelope) { |
| 362 | 338 operator->env_phase = PHASE_DECAY; |
| 339 } | |
| 340 } else { | |
|
370
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
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|
341 if (first_key_on) { |
|
448
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
342 dfprintf(debug_file, "Changing op %d envelope %d by %d in %s phase\n", op, operator->envelope, envelope_inc, |
|
370
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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|
343 operator->env_phase == PHASE_SUSTAIN ? "sustain" : (operator->env_phase == PHASE_DECAY ? "decay": "release")); |
|
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|
344 } |
|
852
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Fix some bugs in the attack phase and sustain level in the envelope generator
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parents:
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diff
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|
345 //envelope value is 10-bits, but it will be used as a 4.8 value |
|
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parents:
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diff
changeset
|
346 operator->envelope += envelope_inc << 2; |
| 362 | 347 //clamp to max attenuation value |
| 348 if (operator->envelope > MAX_ENVELOPE) { | |
| 349 operator->envelope = MAX_ENVELOPE; | |
| 350 } | |
| 351 if (operator->env_phase == PHASE_DECAY && operator->envelope >= operator->sustain_level) { | |
|
370
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|
352 //operator->envelope = operator->sustain_level; |
| 362 | 353 operator->env_phase = PHASE_SUSTAIN; |
| 354 } | |
| 355 } | |
|
364
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Incredibly broken YM2612 support plus a fix to Z80 bus request
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362
diff
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|
356 } |
|
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diff
changeset
|
357 context->current_env_op++; |
|
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changeset
|
358 if (context->current_env_op == NUM_OPERATORS) { |
|
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changeset
|
359 context->current_env_op = 0; |
|
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diff
changeset
|
360 context->env_counter++; |
| 362 | 361 } |
| 362 } | |
|
448
e85a107e6ec0
Fix handling of key on in YM2612 core
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424
diff
changeset
|
363 |
| 362 | 364 //Update Phase Generator |
|
364
62177cc39049
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Mike Pavone <pavone@retrodev.com>
parents:
362
diff
changeset
|
365 uint32_t channel = context->current_op / 4; |
| 362 | 366 if (channel != 5 || !context->dac_enable) { |
|
364
62177cc39049
Incredibly broken YM2612 support plus a fix to Z80 bus request
Mike Pavone <pavone@retrodev.com>
parents:
362
diff
changeset
|
367 uint32_t op = context->current_op; |
| 362 | 368 //printf("updating operator %d of channel %d\n", op, channel); |
| 369 ym_operator * operator = context->operators + op; | |
| 370 ym_channel * chan = context->channels + channel; | |
|
396
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|
371 uint16_t phase = operator->phase_counter >> 10 & 0x3FF; |
| 362 | 372 operator->phase_counter += operator->phase_inc; |
|
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|
373 if (chan->pms) { |
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374 //not entirely sure this will get the precision correct, but I'd like to avoid recalculating phase |
|
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375 //increment every update when LFO phase modulation is enabled |
|
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376 int16_t lfo_mod = lfo_pm_table[(chan->fnum & 0x7F0) * 16 + chan->pms + context->lfo_pm_step]; |
|
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Initial stab at LFO phase modulation
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|
377 if (operator->multiple) { |
|
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Initial stab at LFO phase modulation
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|
378 lfo_mod *= operator->multiple; |
|
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Initial stab at LFO phase modulation
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|
379 } else { |
|
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diff
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|
380 lfo_mod >>= 1; |
|
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381 } |
|
448
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Fix handling of key on in YM2612 core
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|
382 operator->phase_counter += lfo_mod; |
|
411
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383 } |
|
371
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370
diff
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|
384 int16_t mod = 0; |
| 362 | 385 switch (op % 4) |
|
359
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386 { |
| 362 | 387 case 0://Operator 1 |
| 377 | 388 if (chan->feedback) { |
|
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389 mod = (chan->op1_old + operator->output) >> (10-chan->feedback); |
| 377 | 390 } |
|
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|
391 break; |
| 362 | 392 case 1://Operator 3 |
| 393 switch(chan->algorithm) | |
| 394 { | |
| 395 case 0: | |
| 396 case 2: | |
| 397 //modulate by operator 2 | |
|
379
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diff
changeset
|
398 mod = context->operators[op+1].output >> YM_MOD_SHIFT; |
| 362 | 399 break; |
| 400 case 1: | |
| 401 //modulate by operator 1+2 | |
|
379
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diff
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402 mod = (context->operators[op-1].output + context->operators[op+1].output) >> YM_MOD_SHIFT; |
| 362 | 403 break; |
| 404 case 5: | |
| 405 //modulate by operator 1 | |
|
379
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diff
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406 mod = context->operators[op-1].output >> YM_MOD_SHIFT; |
| 362 | 407 } |
| 408 break; | |
| 409 case 2://Operator 2 | |
|
406
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Fix modulation condition for operator 2
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parents:
403
diff
changeset
|
410 if (chan->algorithm != 1 && chan->algorithm != 2 && chan->algorithm != 7) { |
| 362 | 411 //modulate by Operator 1 |
|
379
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parents:
378
diff
changeset
|
412 mod = context->operators[op-2].output >> YM_MOD_SHIFT; |
| 362 | 413 } |
|
359
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changeset
|
414 break; |
| 362 | 415 case 3://Operator 4 |
| 416 switch(chan->algorithm) | |
| 417 { | |
| 418 case 0: | |
| 419 case 1: | |
| 420 case 4: | |
| 421 //modulate by operator 3 | |
|
379
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378
diff
changeset
|
422 mod = context->operators[op-2].output >> YM_MOD_SHIFT; |
| 362 | 423 break; |
| 424 case 2: | |
| 425 //modulate by operator 1+3 | |
|
379
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parents:
378
diff
changeset
|
426 mod = (context->operators[op-3].output + context->operators[op-2].output) >> YM_MOD_SHIFT; |
| 362 | 427 break; |
| 428 case 3: | |
| 429 //modulate by operator 2+3 | |
|
379
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Mike Pavone <pavone@retrodev.com>
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378
diff
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|
430 mod = (context->operators[op-1].output + context->operators[op-2].output) >> YM_MOD_SHIFT; |
| 362 | 431 break; |
| 432 case 5: | |
| 433 //modulate by operator 1 | |
|
379
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parents:
378
diff
changeset
|
434 mod = context->operators[op-3].output >> YM_MOD_SHIFT; |
| 362 | 435 break; |
| 436 } | |
|
359
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437 break; |
|
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diff
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|
438 } |
|
370
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
diff
changeset
|
439 uint16_t env = operator->envelope + operator->total_level; |
|
740
25c9e9d39997
Fix LFO counter update speed and implement amplitude modulation
Michael Pavone <pavone@retrodev.com>
parents:
739
diff
changeset
|
440 if (operator->am) { |
|
25c9e9d39997
Fix LFO counter update speed and implement amplitude modulation
Michael Pavone <pavone@retrodev.com>
parents:
739
diff
changeset
|
441 uint16_t base_am = (context->lfo_am_step & 0x80 ? context->lfo_am_step : ~context->lfo_am_step) & 0x7E; |
|
25c9e9d39997
Fix LFO counter update speed and implement amplitude modulation
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parents:
739
diff
changeset
|
442 env += base_am >> ams_shift[chan->ams]; |
|
25c9e9d39997
Fix LFO counter update speed and implement amplitude modulation
Michael Pavone <pavone@retrodev.com>
parents:
739
diff
changeset
|
443 } |
|
370
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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parents:
369
diff
changeset
|
444 if (env > MAX_ENVELOPE) { |
|
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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diff
changeset
|
445 env = MAX_ENVELOPE; |
|
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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parents:
369
diff
changeset
|
446 } |
|
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
diff
changeset
|
447 if (first_key_on) { |
|
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
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diff
changeset
|
448 dfprintf(debug_file, "op %d, base phase: %d, mod: %d, sine: %d, out: %d\n", op, phase, mod, sine_table[(phase+mod) & 0x1FF], pow_table[sine_table[phase & 0x1FF] + env]); |
|
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
diff
changeset
|
449 } |
|
527
7df7f493b3b6
Fix operator 1 self-feedback
Michael Pavone <pavone@retrodev.com>
parents:
522
diff
changeset
|
450 //if ((channel != 0 && channel != 4) || chan->algorithm != 5) { |
|
7df7f493b3b6
Fix operator 1 self-feedback
Michael Pavone <pavone@retrodev.com>
parents:
522
diff
changeset
|
451 phase += mod; |
|
7df7f493b3b6
Fix operator 1 self-feedback
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parents:
522
diff
changeset
|
452 //} |
|
448
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
453 |
|
371
0f8a759f1ff4
Use signed ints for things that represent signed values in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
370
diff
changeset
|
454 int16_t output = pow_table[sine_table[phase & 0x1FF] + env]; |
|
359
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diff
changeset
|
455 if (phase & 0x200) { |
|
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288
diff
changeset
|
456 output = -output; |
|
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parents:
288
diff
changeset
|
457 } |
|
527
7df7f493b3b6
Fix operator 1 self-feedback
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parents:
522
diff
changeset
|
458 if (op % 4 == 0) { |
|
7df7f493b3b6
Fix operator 1 self-feedback
Michael Pavone <pavone@retrodev.com>
parents:
522
diff
changeset
|
459 chan->op1_old = operator->output; |
|
7df7f493b3b6
Fix operator 1 self-feedback
Michael Pavone <pavone@retrodev.com>
parents:
522
diff
changeset
|
460 } |
| 362 | 461 operator->output = output; |
|
359
cc39629e8d06
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Mike Pavone <pavone@retrodev.com>
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288
diff
changeset
|
462 //Update the channel output if we've updated all operators |
|
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parents:
288
diff
changeset
|
463 if (op % 4 == 3) { |
| 362 | 464 if (chan->algorithm < 4) { |
| 465 chan->output = operator->output; | |
| 466 } else if(chan->algorithm == 4) { | |
|
396
09328dbe6700
Fix output of algorithm 4 and make some other minor YM2612 core improvements
Mike Pavone <pavone@retrodev.com>
parents:
386
diff
changeset
|
467 chan->output = operator->output + context->operators[channel * 4 + 2].output; |
|
359
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diff
changeset
|
468 } else { |
|
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288
diff
changeset
|
469 output = 0; |
| 362 | 470 for (uint32_t op = ((chan->algorithm == 7) ? 0 : 1) + channel*4; op < (channel+1)*4; op++) { |
| 471 output += context->operators[op].output; | |
|
359
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288
diff
changeset
|
472 } |
| 362 | 473 chan->output = output; |
|
359
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288
diff
changeset
|
474 } |
|
370
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
diff
changeset
|
475 if (first_key_on) { |
|
371
0f8a759f1ff4
Use signed ints for things that represent signed values in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
370
diff
changeset
|
476 int16_t value = context->channels[channel].output & 0x3FE0; |
|
0f8a759f1ff4
Use signed ints for things that represent signed values in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
370
diff
changeset
|
477 if (value & 0x2000) { |
|
0f8a759f1ff4
Use signed ints for things that represent signed values in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
370
diff
changeset
|
478 value |= 0xC000; |
|
0f8a759f1ff4
Use signed ints for things that represent signed values in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
370
diff
changeset
|
479 } |
|
522
6a14c5a95648
Adjust PSG and YM-2612 volume to be closer to the real console
Michael Pavone <pavone@retrodev.com>
parents:
521
diff
changeset
|
480 dfprintf(debug_file, "channel %d output: %d\n", channel, (value * YM_VOLUME_MULTIPLIER) / YM_VOLUME_DIVIDER); |
|
370
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
diff
changeset
|
481 } |
|
359
cc39629e8d06
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parents:
288
diff
changeset
|
482 } |
| 362 | 483 //puts("operator update done"); |
|
359
cc39629e8d06
YM2612 WIP snapshot before register refactor
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parents:
288
diff
changeset
|
484 } |
|
364
62177cc39049
Incredibly broken YM2612 support plus a fix to Z80 bus request
Mike Pavone <pavone@retrodev.com>
parents:
362
diff
changeset
|
485 context->current_op++; |
|
380
1c8d74f2ab0b
Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
Mike Pavone <pavone@retrodev.com>
parents:
379
diff
changeset
|
486 context->buffer_fraction += context->buffer_inc; |
|
396
09328dbe6700
Fix output of algorithm 4 and make some other minor YM2612 core improvements
Mike Pavone <pavone@retrodev.com>
parents:
386
diff
changeset
|
487 if (context->current_op == NUM_OPERATORS) { |
|
09328dbe6700
Fix output of algorithm 4 and make some other minor YM2612 core improvements
Mike Pavone <pavone@retrodev.com>
parents:
386
diff
changeset
|
488 context->current_op = 0; |
|
483
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
489 } |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
490 if (context->buffer_fraction > BUFFER_INC_RES) { |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
491 context->buffer_fraction -= BUFFER_INC_RES; |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
492 context->audio_buffer[context->buffer_pos] = 0; |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
493 context->audio_buffer[context->buffer_pos + 1] = 0; |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
494 for (int i = 0; i < NUM_CHANNELS; i++) { |
|
521
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
495 int16_t value = context->channels[i].output; |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
496 if (value > 0x1FE0) { |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
497 value = 0x1FE0; |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
498 } else if (value < -0x1FF0) { |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
499 value = -0x1FF0; |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
500 } else { |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
501 value &= 0x3FE0; |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
502 if (value & 0x2000) { |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
503 value |= 0xC000; |
|
7565ec2ac652
Fix overflow handling on FM channel output
Michael Pavone <pavone@retrodev.com>
parents:
513
diff
changeset
|
504 } |
|
380
1c8d74f2ab0b
Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
Mike Pavone <pavone@retrodev.com>
parents:
379
diff
changeset
|
505 } |
|
483
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
506 if (context->channels[i].logfile) { |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
507 fwrite(&value, sizeof(value), 1, context->channels[i].logfile); |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
508 } |
|
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
509 if (context->channels[i].lr & 0x80) { |
|
522
6a14c5a95648
Adjust PSG and YM-2612 volume to be closer to the real console
Michael Pavone <pavone@retrodev.com>
parents:
521
diff
changeset
|
510 context->audio_buffer[context->buffer_pos] += (value * YM_VOLUME_MULTIPLIER) / YM_VOLUME_DIVIDER; |
|
380
1c8d74f2ab0b
Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
Mike Pavone <pavone@retrodev.com>
parents:
379
diff
changeset
|
511 } |
|
483
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
512 if (context->channels[i].lr & 0x40) { |
|
522
6a14c5a95648
Adjust PSG and YM-2612 volume to be closer to the real console
Michael Pavone <pavone@retrodev.com>
parents:
521
diff
changeset
|
513 context->audio_buffer[context->buffer_pos+1] += (value * YM_VOLUME_MULTIPLIER) / YM_VOLUME_DIVIDER; |
|
483
3e1573fa22cf
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514 } |
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515 } |
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516 context->buffer_pos += 2; |
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517 if (context->buffer_pos == context->sample_limit) { |
|
505
b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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518 if (!headless) { |
|
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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519 render_wait_ym(context); |
|
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The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
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520 } |
|
380
1c8d74f2ab0b
Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
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521 } |
|
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522 } |
|
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523 } |
|
535
aaa77e351c24
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524 if (context->current_cycle >= context->write_cycle + (context->busy_cycles * context->clock_inc / 6)) { |
|
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525 context->status &= 0x7F; |
| 374 | 526 context->write_cycle = CYCLE_NEVER; |
|
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527 } |
| 362 | 528 //printf("Done running YM2612 at cycle %d\n", context->current_cycle, to_cycle); |
|
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529 } |
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530 |
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531 void ym_address_write_part1(ym2612_context * context, uint8_t address) |
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532 { |
|
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533 //printf("address_write_part1: %X\n", address); |
| 362 | 534 context->selected_reg = address; |
| 535 context->selected_part = 0; | |
|
535
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diff
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536 context->write_cycle = context->current_cycle; |
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537 context->busy_cycles = BUSY_CYCLES_ADDRESS; |
|
650
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538 context->status |= 0x80; |
|
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539 } |
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540 |
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541 void ym_address_write_part2(ym2612_context * context, uint8_t address) |
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542 { |
|
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543 //printf("address_write_part2: %X\n", address); |
| 362 | 544 context->selected_reg = address; |
| 545 context->selected_part = 1; | |
|
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546 context->write_cycle = context->current_cycle; |
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547 context->busy_cycles = BUSY_CYCLES_ADDRESS; |
|
650
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548 context->status |= 0x80; |
| 362 | 549 } |
| 550 | |
| 551 uint8_t fnum_to_keycode[] = { | |
| 552 //F11 = 0 | |
| 553 0,0,0,0,0,0,0,1, | |
| 554 //F11 = 1 | |
| 555 2,3,3,3,3,3,3,3 | |
| 556 }; | |
| 557 | |
| 558 //table courtesy of Nemesis | |
| 559 uint32_t detune_table[][4] = { | |
| 560 {0, 0, 1, 2}, //0 (0x00) | |
| 561 {0, 0, 1, 2}, //1 (0x01) | |
| 562 {0, 0, 1, 2}, //2 (0x02) | |
| 563 {0, 0, 1, 2}, //3 (0x03) | |
| 564 {0, 1, 2, 2}, //4 (0x04) | |
| 565 {0, 1, 2, 3}, //5 (0x05) | |
| 566 {0, 1, 2, 3}, //6 (0x06) | |
| 567 {0, 1, 2, 3}, //7 (0x07) | |
| 568 {0, 1, 2, 4}, //8 (0x08) | |
| 569 {0, 1, 3, 4}, //9 (0x09) | |
| 570 {0, 1, 3, 4}, //10 (0x0A) | |
| 571 {0, 1, 3, 5}, //11 (0x0B) | |
| 572 {0, 2, 4, 5}, //12 (0x0C) | |
| 573 {0, 2, 4, 6}, //13 (0x0D) | |
| 574 {0, 2, 4, 6}, //14 (0x0E) | |
| 575 {0, 2, 5, 7}, //15 (0x0F) | |
| 576 {0, 2, 5, 8}, //16 (0x10) | |
| 577 {0, 3, 6, 8}, //17 (0x11) | |
| 578 {0, 3, 6, 9}, //18 (0x12) | |
| 579 {0, 3, 7,10}, //19 (0x13) | |
| 580 {0, 4, 8,11}, //20 (0x14) | |
| 581 {0, 4, 8,12}, //21 (0x15) | |
| 582 {0, 4, 9,13}, //22 (0x16) | |
| 583 {0, 5,10,14}, //23 (0x17) | |
| 584 {0, 5,11,16}, //24 (0x18) | |
| 585 {0, 6,12,17}, //25 (0x19) | |
| 586 {0, 6,13,19}, //26 (0x1A) | |
| 587 {0, 7,14,20}, //27 (0x1B) | |
| 588 {0, 8,16,22}, //28 (0x1C) | |
| 589 {0, 8,16,22}, //29 (0x1D) | |
| 590 {0, 8,16,22}, //30 (0x1E) | |
| 591 {0, 8,16,22} | |
| 592 }; //31 (0x1F) | |
| 593 | |
| 594 void ym_update_phase_inc(ym2612_context * context, ym_operator * operator, uint32_t op) | |
| 595 { | |
| 596 uint32_t chan_num = op / 4; | |
| 597 //printf("ym_update_phase_inc | channel: %d, op: %d\n", chan_num, op); | |
| 598 //base frequency | |
| 599 ym_channel * channel = context->channels + chan_num; | |
|
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600 uint32_t inc, detune; |
|
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Initial implementation of channel 3 special mode
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601 if (chan_num == 2 && context->ch3_mode && (op < (2*4 + 3))) { |
|
738
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602 //supplemental fnum registers are in a different order than normal slot paramters |
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603 int index = (op-2*4) ^ 2; |
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604 inc = context->ch3_supp[index].fnum; |
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605 if (!context->ch3_supp[index].block) { |
|
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606 inc >>= 1; |
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607 } else { |
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608 inc <<= (context->ch3_supp[index].block-1); |
|
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609 } |
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610 //detune |
|
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611 detune = detune_table[context->ch3_supp[index].keycode][operator->detune & 0x3]; |
|
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612 } else { |
|
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613 inc = channel->fnum; |
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Initial implementation of channel 3 special mode
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614 if (!channel->block) { |
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Initial implementation of channel 3 special mode
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615 inc >>= 1; |
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Initial implementation of channel 3 special mode
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616 } else { |
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617 inc <<= (channel->block-1); |
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618 } |
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619 //detune |
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620 detune = detune_table[channel->keycode][operator->detune & 0x3]; |
|
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621 } |
|
739
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diff
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|
622 if (operator->detune & 0x4) { |
| 362 | 623 inc -= detune; |
| 624 //this can underflow, mask to 17-bit result | |
| 625 inc &= 0x1FFFF; | |
| 626 } else { | |
| 627 inc += detune; | |
| 628 } | |
| 629 //multiple | |
| 630 if (operator->multiple) { | |
| 631 inc *= operator->multiple; | |
|
739
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632 inc &= 0xFFFFF; |
| 362 | 633 } else { |
| 634 //0.5 | |
| 635 inc >>= 1; | |
|
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636 } |
|
365
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637 //printf("phase_inc for operator %d: %d, block: %d, fnum: %d, detune: %d, multiple: %d\n", op, inc, channel->block, channel->fnum, detune, operator->multiple); |
|
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638 operator->phase_inc = inc; |
|
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639 } |
|
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640 |
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641 void ym_data_write(ym2612_context * context, uint8_t value) |
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642 { |
|
451
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643 if (context->selected_reg >= YM_REG_END) { |
| 362 | 644 return; |
|
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645 } |
|
451
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646 if (context->selected_part) { |
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647 if (context->selected_reg < YM_PART2_START) { |
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648 return; |
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649 } |
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650 context->part2_regs[context->selected_reg - YM_PART2_START] = value; |
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651 } else { |
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652 if (context->selected_reg < YM_PART1_START) { |
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653 return; |
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654 } |
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655 context->part1_regs[context->selected_reg - YM_PART1_START] = value; |
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656 } |
|
370
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Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
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657 dfprintf(debug_file, "write of %X to reg %X in part %d\n", value, context->selected_reg, context->selected_part+1); |
| 362 | 658 if (context->selected_reg < 0x30) { |
| 659 //Shared regs | |
| 660 switch (context->selected_reg) | |
| 661 { | |
|
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662 //TODO: Test reg |
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663 case REG_LFO: |
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664 /*if ((value & 0x8) && !context->lfo_enable) { |
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665 printf("LFO Enabled, Freq: %d\n", value & 0x7); |
|
532
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666 }*/ |
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667 context->lfo_enable = value & 0x8; |
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668 if (!context->lfo_enable) { |
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669 context->lfo_am_step = context->lfo_pm_step = 0; |
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670 } |
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671 context->lfo_freq = value & 0x7; |
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672 |
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673 break; |
| 362 | 674 case REG_TIMERA_HIGH: |
| 675 context->timer_a_load &= 0x3; | |
| 676 context->timer_a_load |= value << 2; | |
| 677 break; | |
| 678 case REG_TIMERA_LOW: | |
| 679 context->timer_a_load &= 0xFFFC; | |
| 680 context->timer_a_load |= value & 0x3; | |
| 681 break; | |
| 682 case REG_TIMERB: | |
|
845
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
683 context->timer_b_load = value; |
| 362 | 684 break; |
|
383
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
685 case REG_TIME_CTRL: { |
| 403 | 686 if (value & BIT_TIMERA_ENABLE && !(context->timer_control & BIT_TIMERA_ENABLE)) { |
|
845
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
687 context->timer_a = TIMER_A_MAX; |
|
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
688 context->timer_control |= BIT_TIMERA_LOAD; |
| 403 | 689 } |
| 690 if (value & BIT_TIMERB_ENABLE && !(context->timer_control & BIT_TIMERB_ENABLE)) { | |
|
845
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
691 context->timer_b = TIMER_B_MAX; |
|
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
692 context->timer_control |= BIT_TIMERB_LOAD; |
| 403 | 693 } |
|
845
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
694 context->timer_control &= (BIT_TIMERA_LOAD | BIT_TIMERB_LOAD); |
|
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
695 context->timer_control |= value & 0xF; |
| 403 | 696 if (value & BIT_TIMERA_RESET) { |
| 697 context->status &= ~BIT_STATUS_TIMERA; | |
| 698 } | |
| 699 if (value & BIT_TIMERB_RESET) { | |
| 700 context->status &= ~BIT_STATUS_TIMERB; | |
| 701 } | |
|
383
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
702 uint8_t old_mode = context->ch3_mode; |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
703 context->ch3_mode = value & 0xC0; |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
704 if (context->ch3_mode != old_mode) { |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
705 ym_update_phase_inc(context, context->operators + 2*4, 2*4); |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
706 ym_update_phase_inc(context, context->operators + 2*4+1, 2*4+1); |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
707 ym_update_phase_inc(context, context->operators + 2*4+2, 2*4+2); |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
708 } |
| 362 | 709 break; |
|
383
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
710 } |
| 362 | 711 case REG_KEY_ONOFF: { |
| 712 uint8_t channel = value & 0x7; | |
|
386
6e5c4f3ab0e2
Fix channel mapping in key on/off register
Mike Pavone <pavone@retrodev.com>
parents:
383
diff
changeset
|
713 if (channel != 3 && channel != 7) { |
|
6e5c4f3ab0e2
Fix channel mapping in key on/off register
Mike Pavone <pavone@retrodev.com>
parents:
383
diff
changeset
|
714 if (channel > 2) { |
|
6e5c4f3ab0e2
Fix channel mapping in key on/off register
Mike Pavone <pavone@retrodev.com>
parents:
383
diff
changeset
|
715 channel--; |
|
6e5c4f3ab0e2
Fix channel mapping in key on/off register
Mike Pavone <pavone@retrodev.com>
parents:
383
diff
changeset
|
716 } |
|
851
b10cf2c921ad
Fix mapping of key on/off reg bits to operators
Michael Pavone <pavone@retrodev.com>
parents:
848
diff
changeset
|
717 uint8_t bits[] = {0x10, 0x40, 0x20, 0x80}; |
|
b10cf2c921ad
Fix mapping of key on/off reg bits to operators
Michael Pavone <pavone@retrodev.com>
parents:
848
diff
changeset
|
718 for (uint8_t op = channel * 4, bit = 0; op < (channel + 1) * 4; op++, bit++) { |
|
b10cf2c921ad
Fix mapping of key on/off reg bits to operators
Michael Pavone <pavone@retrodev.com>
parents:
848
diff
changeset
|
719 if (value & bits[bit]) { |
|
448
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
720 if (context->operators[op].env_phase == PHASE_RELEASE) |
|
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
721 { |
|
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
722 first_key_on = 1; |
|
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
723 //printf("Key On for operator %d in channel %d\n", op, channel); |
|
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
724 context->operators[op].phase_counter = 0; |
|
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
725 context->operators[op].env_phase = PHASE_ATTACK; |
|
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
726 } |
| 362 | 727 } else { |
| 728 //printf("Key Off for operator %d in channel %d\n", op, channel); | |
| 729 context->operators[op].env_phase = PHASE_RELEASE; | |
| 730 } | |
| 731 } | |
| 732 } | |
| 733 break; | |
| 734 } | |
| 735 case REG_DAC: | |
| 736 if (context->dac_enable) { | |
| 737 context->channels[5].output = (((int16_t)value) - 0x80) << 6; | |
|
396
09328dbe6700
Fix output of algorithm 4 and make some other minor YM2612 core improvements
Mike Pavone <pavone@retrodev.com>
parents:
386
diff
changeset
|
738 //printf("DAC Write %X(%d) @ %d\n", value, context->channels[5].output, context->current_cycle); |
| 362 | 739 } |
| 740 break; | |
| 741 case REG_DAC_ENABLE: | |
|
364
62177cc39049
Incredibly broken YM2612 support plus a fix to Z80 bus request
Mike Pavone <pavone@retrodev.com>
parents:
362
diff
changeset
|
742 //printf("DAC Enable: %X\n", value); |
| 362 | 743 context->dac_enable = value & 0x80; |
| 744 break; | |
| 745 } | |
| 746 } else if (context->selected_reg < 0xA0) { | |
| 747 //part | |
| 748 uint8_t op = context->selected_part ? (NUM_OPERATORS/2) : 0; | |
| 749 //channel in part | |
| 750 if ((context->selected_reg & 0x3) != 0x3) { | |
|
370
5f215603d001
Fix register to operator mapping. Fix rate table generation. Add TL to envelope value rather than using it as a limit for the attack phase.
Mike Pavone <pavone@retrodev.com>
parents:
369
diff
changeset
|
751 op += 4 * (context->selected_reg & 0x3) + ((context->selected_reg & 0xC) / 4); |
| 362 | 752 //printf("write targets operator %d (%d of channel %d)\n", op, op % 4, op / 4); |
| 753 ym_operator * operator = context->operators + op; | |
| 754 switch (context->selected_reg & 0xF0) | |
| 755 { | |
| 756 case REG_DETUNE_MULT: | |
| 757 operator->detune = value >> 4 & 0x7; | |
| 758 operator->multiple = value & 0xF; | |
| 759 ym_update_phase_inc(context, operator, op); | |
| 760 break; | |
| 761 case REG_TOTAL_LEVEL: | |
| 762 operator->total_level = (value & 0x7F) << 5; | |
| 763 break; | |
| 764 case REG_ATTACK_KS: | |
| 376 | 765 operator->key_scaling = 3 - (value >> 6); |
| 362 | 766 operator->rates[PHASE_ATTACK] = value & 0x1F; |
| 767 break; | |
| 768 case REG_DECAY_AM: | |
| 769 //TODO: AM flag for LFO | |
|
739
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
770 operator->am = value & 0x80; |
| 362 | 771 operator->rates[PHASE_DECAY] = value & 0x1F; |
| 772 break; | |
| 773 case REG_SUSTAIN_RATE: | |
| 774 operator->rates[PHASE_SUSTAIN] = value & 0x1F; | |
| 775 break; | |
| 776 case REG_S_LVL_R_RATE: | |
| 777 operator->rates[PHASE_RELEASE] = (value & 0xF) << 1 | 1; | |
|
852
5de8759b87af
Fix some bugs in the attack phase and sustain level in the envelope generator
Michael Pavone <pavone@retrodev.com>
parents:
851
diff
changeset
|
778 operator->sustain_level = (value & 0xF0) << 3; |
|
5de8759b87af
Fix some bugs in the attack phase and sustain level in the envelope generator
Michael Pavone <pavone@retrodev.com>
parents:
851
diff
changeset
|
779 if (operator->sustain_level == 0x780) { |
|
5de8759b87af
Fix some bugs in the attack phase and sustain level in the envelope generator
Michael Pavone <pavone@retrodev.com>
parents:
851
diff
changeset
|
780 operator->sustain_level = MAX_ENVELOPE; |
|
5de8759b87af
Fix some bugs in the attack phase and sustain level in the envelope generator
Michael Pavone <pavone@retrodev.com>
parents:
851
diff
changeset
|
781 } |
| 362 | 782 break; |
| 783 } | |
| 784 } | |
| 785 } else { | |
| 786 uint8_t channel = context->selected_reg & 0x3; | |
| 787 if (channel != 3) { | |
| 788 if (context->selected_part) { | |
| 789 channel += 3; | |
| 790 } | |
| 791 //printf("write targets channel %d\n", channel); | |
| 792 switch (context->selected_reg & 0xFC) | |
| 793 { | |
| 794 case REG_FNUM_LOW: | |
| 795 context->channels[channel].block = context->channels[channel].block_fnum_latch >> 3 & 0x7; | |
| 796 context->channels[channel].fnum = (context->channels[channel].block_fnum_latch & 0x7) << 8 | value; | |
| 797 context->channels[channel].keycode = context->channels[channel].block << 2 | fnum_to_keycode[context->channels[channel].fnum >> 7]; | |
| 798 ym_update_phase_inc(context, context->operators + channel*4, channel*4); | |
| 799 ym_update_phase_inc(context, context->operators + channel*4+1, channel*4+1); | |
| 800 ym_update_phase_inc(context, context->operators + channel*4+2, channel*4+2); | |
| 801 ym_update_phase_inc(context, context->operators + channel*4+3, channel*4+3); | |
| 802 break; | |
| 803 case REG_BLOCK_FNUM_H:{ | |
| 804 context->channels[channel].block_fnum_latch = value; | |
| 805 break; | |
| 806 } | |
|
383
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
807 case REG_FNUM_LOW_CH3: |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
808 if (channel < 3) { |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
809 context->ch3_supp[channel].block = context->ch3_supp[channel].block_fnum_latch >> 3 & 0x7; |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
810 context->ch3_supp[channel].fnum = (context->ch3_supp[channel].block_fnum_latch & 0x7) << 8 | value; |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
811 context->ch3_supp[channel].keycode = context->ch3_supp[channel].block << 2 | fnum_to_keycode[context->ch3_supp[channel].fnum >> 7]; |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
812 if (context->ch3_mode) { |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
813 ym_update_phase_inc(context, context->operators + 2*4 + channel, 2*4); |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
814 } |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
815 } |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
816 break; |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
817 case REG_BLOCK_FN_CH3: |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
818 if (channel < 3) { |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
819 context->ch3_supp[channel].block_fnum_latch = value; |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
820 } |
|
72933100c55c
Initial implementation of channel 3 special mode
Mike Pavone <pavone@retrodev.com>
parents:
382
diff
changeset
|
821 break; |
| 362 | 822 case REG_ALG_FEEDBACK: |
| 823 context->channels[channel].algorithm = value & 0x7; | |
| 824 context->channels[channel].feedback = value >> 3 & 0x7; | |
|
527
7df7f493b3b6
Fix operator 1 self-feedback
Michael Pavone <pavone@retrodev.com>
parents:
522
diff
changeset
|
825 //printf("Algorithm %d, feedback %d for channel %d\n", value & 0x7, value >> 3 & 0x7, channel); |
| 362 | 826 break; |
| 827 case REG_LR_AMS_PMS: | |
|
411
baf4688901f2
Initial stab at LFO phase modulation
Mike Pavone <pavone@retrodev.com>
parents:
407
diff
changeset
|
828 context->channels[channel].pms = (value & 0x7) * 32; |
| 362 | 829 context->channels[channel].ams = value >> 4 & 0x3; |
| 830 context->channels[channel].lr = value & 0xC0; | |
|
369
fc820ab1394b
Fix left/right enable default value
Mike Pavone <pavone@retrodev.com>
parents:
365
diff
changeset
|
831 //printf("Write of %X to LR_AMS_PMS reg for channel %d\n", value, channel); |
| 362 | 832 break; |
| 833 } | |
| 834 } | |
| 835 } | |
|
448
e85a107e6ec0
Fix handling of key on in YM2612 core
Mike Pavone <pavone@retrodev.com>
parents:
424
diff
changeset
|
836 |
| 362 | 837 context->write_cycle = context->current_cycle; |
|
535
aaa77e351c24
Better emulation of the YM-2612 busy flag
Mike Pavone <pavone@retrodev.com>
parents:
532
diff
changeset
|
838 context->busy_cycles = context->selected_reg < 0xA0 ? BUSY_CYCLES_DATA_LOW : BUSY_CYCLES_DATA_HIGH; |
| 374 | 839 context->status |= 0x80; |
|
288
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
840 } |
|
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
841 |
|
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
842 uint8_t ym_read_status(ym2612_context * context) |
|
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
843 { |
|
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
844 return context->status; |
|
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
845 } |
|
a8ee7934a1f8
Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
846 |
|
739
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
847 void ym_print_channel_info(ym2612_context *context, int channel) |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
848 { |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
849 ym_channel *chan = context->channels + channel; |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
850 printf("\n***Channel %d***\n" |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
851 "Algorithm: %d\n" |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
852 "Feedback: %d\n" |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
853 "Pan: %s\n" |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
854 "AMS: %d\n" |
|
845
3a18b5f63afc
Small fix to how manual YM-2612 timer reloads work. Seems to better match a small test program and gets audio to match up in TM.EE's "I've got Italo Inside" track.
Michael Pavone <pavone@retrodev.com>
parents:
740
diff
changeset
|
855 "PMS: %d\n", |
|
739
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
856 channel+1, chan->algorithm, chan->feedback, |
|
2317bdca03b4
Add a basic YM-2612 command to the debugger. Fix negative detune values and get the correct precision for the multiplication step of phase inc calculation
Michael Pavone <pavone@retrodev.com>
parents:
738
diff
changeset
|
857 chan->lr == 0xC0 ? "LR" : chan->lr == 0x80 ? "L" : chan->lr == 0x40 ? "R" : "", |
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858 chan->ams, chan->pms); |
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859 for (int operator = channel * 4; operator < channel * 4+4; operator++) |
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860 { |
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861 int dispnum = operator - channel * 4 + 1; |
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862 if (dispnum == 2) { |
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863 dispnum = 3; |
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864 } else if (dispnum == 3) { |
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865 dispnum = 2; |
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866 } |
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867 ym_operator *op = context->operators + operator; |
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868 printf("\nOperator %d:\n" |
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869 " Multiple: %d\n" |
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870 " Detune: %d\n" |
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871 " Total Level: %d\n" |
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872 " Attack Rate: %d\n" |
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873 " Key Scaling: %d\n" |
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874 " Decay Rate: %d\n" |
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875 " Sustain Level: %d\n" |
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876 " Sustain Rate: %d\n" |
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877 " Release Rate: %d\n" |
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878 " Amplitude Modulation %s\n", |
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879 dispnum, op->multiple, op->detune, op->total_level, |
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880 op->rates[PHASE_ATTACK], op->key_scaling, op->rates[PHASE_DECAY], |
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881 op->sustain_level, op->rates[PHASE_SUSTAIN], op->rates[PHASE_RELEASE], |
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882 op->am ? "On" : "Off"); |
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883 } |
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884 } |
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885 |