Mercurial > repos > blastem
annotate gen_player.c @ 2274:bf1bb893f104
Properly ignore low bits of SP start address in disassembler
author | Michael Pavone <pavone@retrodev.com> |
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date | Thu, 29 Dec 2022 22:44:35 -0800 |
parents | 01ff005b08f6 |
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rev | line source |
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1986 | 1 #include <stdlib.h> |
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2 #include "gen_player.h" |
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3 #include "event_log.h" |
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4 #include "render.h" |
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5 |
1986 | 6 #define MCLKS_NTSC 53693175 |
7 #define MCLKS_PAL 53203395 | |
8 #define MCLKS_PER_YM 7 | |
9 #define MCLKS_PER_Z80 15 | |
10 #define MCLKS_PER_PSG (MCLKS_PER_Z80*16) | |
11 | |
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12 #ifdef IS_LIB |
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13 #define MAX_SOUND_CYCLES (MCLKS_PER_YM*NUM_OPERATORS*6*4) |
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14 #else |
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15 #define MAX_SOUND_CYCLES 100000 |
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16 #endif |
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17 |
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18 static void sync_sound(gen_player *gen, uint32_t target) |
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19 { |
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20 //printf("YM | Cycle: %d, bpos: %d, PSG | Cycle: %d, bpos: %d\n", gen->ym->current_cycle, gen->ym->buffer_pos, gen->psg->cycles, gen->psg->buffer_pos * 2); |
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21 while (target > gen->psg->cycles && target - gen->psg->cycles > MAX_SOUND_CYCLES) { |
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22 uint32_t cur_target = gen->psg->cycles + MAX_SOUND_CYCLES; |
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23 //printf("Running PSG to cycle %d\n", cur_target); |
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24 psg_run(gen->psg, cur_target); |
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25 //printf("Running YM-2612 to cycle %d\n", cur_target); |
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26 ym_run(gen->ym, cur_target); |
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27 } |
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28 psg_run(gen->psg, target); |
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29 ym_run(gen->ym, target); |
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30 |
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31 //printf("Target: %d, YM bufferpos: %d, PSG bufferpos: %d\n", target, gen->ym->buffer_pos, gen->psg->buffer_pos * 2); |
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32 } |
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33 |
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34 static void run(gen_player *player) |
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35 { |
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36 while(player->reader.socket || player->reader.buffer.cur_pos < player->reader.buffer.size) |
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37 { |
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38 uint32_t cycle; |
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39 uint8_t event = reader_next_event(&player->reader, &cycle); |
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40 switch (event) |
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41 { |
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42 case EVENT_FLUSH: |
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43 sync_sound(player, cycle); |
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44 vdp_run_context(player->vdp, cycle); |
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45 break; |
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46 case EVENT_ADJUST: { |
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47 sync_sound(player, cycle); |
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48 vdp_run_context(player->vdp, cycle); |
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49 uint32_t deduction = load_int32(&player->reader.buffer); |
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50 ym_adjust_cycles(player->ym, deduction); |
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51 vdp_adjust_cycles(player->vdp, deduction); |
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52 player->psg->cycles -= deduction; |
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53 break; |
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54 case EVENT_PSG_REG: |
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55 sync_sound(player, cycle); |
1957 | 56 reader_ensure_data(&player->reader, 1); |
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57 psg_write(player->psg, load_int8(&player->reader.buffer)); |
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58 break; |
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59 case EVENT_YM_REG: { |
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60 sync_sound(player, cycle); |
1957 | 61 reader_ensure_data(&player->reader, 3); |
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62 uint8_t part = load_int8(&player->reader.buffer); |
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63 uint8_t reg = load_int8(&player->reader.buffer); |
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64 uint8_t value = load_int8(&player->reader.buffer); |
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65 if (part) { |
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66 ym_address_write_part2(player->ym, reg); |
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67 } else { |
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68 ym_address_write_part1(player->ym, reg); |
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69 } |
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70 ym_data_write(player->ym, value); |
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71 break; |
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72 case EVENT_STATE: { |
1957 | 73 reader_ensure_data(&player->reader, 3); |
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74 uint32_t size = load_int8(&player->reader.buffer) << 16; |
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75 size |= load_int16(&player->reader.buffer); |
1957 | 76 reader_ensure_data(&player->reader, size); |
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77 deserialize_buffer buffer; |
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78 init_deserialize(&buffer, player->reader.buffer.data + player->reader.buffer.cur_pos, size); |
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79 register_section_handler(&buffer, (section_handler){.fun = vdp_deserialize, .data = player->vdp}, SECTION_VDP); |
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80 register_section_handler(&buffer, (section_handler){.fun = ym_deserialize, .data = player->ym}, SECTION_YM2612); |
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81 register_section_handler(&buffer, (section_handler){.fun = psg_deserialize, .data = player->psg}, SECTION_PSG); |
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82 while (buffer.cur_pos < buffer.size) |
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83 { |
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84 load_section(&buffer); |
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85 } |
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86 player->reader.buffer.cur_pos += size; |
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87 free(buffer.handlers); |
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88 break; |
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89 } |
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90 default: |
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91 vdp_run_context(player->vdp, cycle); |
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92 vdp_replay_event(player->vdp, event, &player->reader); |
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93 } |
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94 } |
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95 |
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96 } |
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97 if (!player->reader.socket) { |
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98 reader_ensure_data(&player->reader, 1); |
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99 } |
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100 } |
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101 } |
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102 |
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103 static int thread_main(void *player) |
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104 { |
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105 run(player); |
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106 return 0; |
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107 } |
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108 |
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109 void start_context(system_header *sys, char *statefile) |
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110 { |
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111 gen_player *player = (gen_player *)sys; |
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112 if (player->reader.socket) { |
1986 | 113 #ifndef IS_LIB |
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114 render_create_thread(&player->thread, "player", thread_main, player); |
1986 | 115 #endif |
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116 } else { |
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117 run(player); |
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118 } |
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119 } |
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120 |
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121 static void gamepad_down(system_header *system, uint8_t gamepad_num, uint8_t button) |
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122 { |
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123 gen_player *player = (gen_player *)system; |
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124 reader_send_gamepad_event(&player->reader, gamepad_num, button, 1); |
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125 } |
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126 |
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127 static void gamepad_up(system_header *system, uint8_t gamepad_num, uint8_t button) |
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128 { |
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129 gen_player *player = (gen_player *)system; |
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130 reader_send_gamepad_event(&player->reader, gamepad_num, button, 0); |
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131 } |
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132 |
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133 static void config_common(gen_player *player) |
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134 { |
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135 uint8_t vid_std = load_int8(&player->reader.buffer); |
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136 uint8_t name_len = load_int8(&player->reader.buffer); |
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137 player->header.info.name = calloc(1, name_len + 1); |
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138 load_buffer8(&player->reader.buffer, player->header.info.name, name_len); |
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139 |
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140 player->vdp = init_vdp_context(vid_std == VID_PAL, 0, VDP_GENESIS); |
1947
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141 render_set_video_standard(vid_std); |
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142 uint32_t master_clock = vid_std == VID_NTSC ? MCLKS_NTSC : MCLKS_PAL; |
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143 |
1947
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144 player->ym = malloc(sizeof(ym2612_context)); |
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145 ym_init(player->ym, master_clock, MCLKS_PER_YM, 0); |
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146 |
1947
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147 player->psg = malloc(sizeof(psg_context)); |
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148 psg_init(player->psg, master_clock, MCLKS_PER_PSG); |
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149 |
1947
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150 player->header.start_context = start_context; |
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151 player->header.gamepad_down = gamepad_down; |
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152 player->header.gamepad_up = gamepad_up; |
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153 player->header.type = SYSTEM_GENESIS_PLAYER; |
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154 player->header.info.save_type = SAVE_NONE; |
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155 } |
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156 |
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157 gen_player *alloc_config_gen_player(void *stream, uint32_t rom_size) |
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158 { |
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159 uint8_t *data = stream; |
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160 gen_player *player = calloc(1, sizeof(gen_player)); |
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161 init_event_reader(&player->reader, data + 9, rom_size - 9); |
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162 config_common(player); |
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163 return player; |
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164 } |
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165 |
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166 gen_player *alloc_config_gen_player_reader(event_reader *reader) |
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167 { |
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168 gen_player *player = calloc(1, sizeof(gen_player)); |
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169 player->reader = *reader; |
1958
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170 inflateCopy(&player->reader.input_stream, &reader->input_stream); |
1967
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171 render_set_external_sync(1); |
1947
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172 config_common(player); |
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173 return player; |
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174 } |
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175 |