Mercurial > repos > blastem
annotate cdd_mcu.c @ 2142:d9151d0894c7
Fix some CD-ROM emulation issues
author | Michael Pavone <pavone@retrodev.com> |
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date | Thu, 24 Mar 2022 23:43:43 -0700 |
parents | 793715149f16 |
children | c3ee42c89b27 |
rev | line source |
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2061
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1 #include "cdd_mcu.h" |
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2 #include "backend.h" |
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3 |
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4 #define SCD_MCLKS 50000000 |
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5 #define CD_BLOCK_CLKS 16934400 |
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6 #define CDD_MCU_DIVIDER 8 |
2141
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7 #define SECTORS_PER_SECOND 75 |
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8 #define SECTOR_CLOCKS (CD_BLOCK_CLKS/SECTORS_PER_SECOND) |
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9 #define NIBBLE_CLOCKS (CDD_MCU_DIVIDER * 77) |
2062
07ed42bd7b4c
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10 #define BYTE_CLOCKS (SECTOR_CLOCKS/2352) // 96 |
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11 #define SUBCODE_CLOCKS (SECTOR_CLOCKS/98) |
2115
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12 #define PROCESSING_DELAY 54000 //approximate, based on Wondermega M1 measurements |
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13 |
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14 //lead in start max diameter 46 mm |
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15 //program area start max diameter 50 mm |
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16 //difference 4 mm = 4000 um |
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17 //radius difference 2 mm = 2000 um |
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18 //track pitch 1.6 um |
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19 //1250 physical tracks in between |
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20 //linear speed 1.2 m/s - 1.4 m/s |
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21 // 1.3 m = 1300 mm |
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22 // circumference at 46 mm ~ 144.51 mm |
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23 // circumference at 50 mm ~ 157.08 mm |
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24 // avg is 150.795 |
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25 // 75 sectors per second |
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26 // 17.3333 mm "typical" length of a sector |
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27 // ~8.7 sectors per track in lead-in area |
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28 #define LEADIN_SECTORS 10875 |
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29 |
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30 static uint32_t cd_block_to_mclks(uint32_t cycles) |
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31 { |
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32 return ((uint64_t)cycles) * ((uint64_t)SCD_MCLKS) / ((uint64_t)CD_BLOCK_CLKS); |
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33 } |
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34 |
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35 static uint32_t mclks_to_cd_block(uint32_t cycles) |
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36 { |
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37 return ((uint64_t)cycles) * ((uint64_t)CD_BLOCK_CLKS) / ((uint64_t)SCD_MCLKS); |
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38 } |
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39 |
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40 void cdd_mcu_init(cdd_mcu *context, system_media *media) |
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41 { |
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42 context->next_int_cycle = CYCLE_NEVER; |
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43 context->next_subcode_int_cycle = CYCLE_NEVER; |
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44 context->last_sector_cycle = CYCLE_NEVER; |
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45 context->last_nibble_cycle = CYCLE_NEVER; |
2089
0db3af42dd72
Fix some byte order stuff for audio tracks
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46 context->next_byte_cycle = 0; |
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47 context->next_subcode_cycle = CYCLE_NEVER; |
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48 context->requested_format = SF_NOTREADY; |
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49 context->media = media; |
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50 context->current_status_nibble = -1; |
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51 context->current_cmd_nibble = -1; |
2076
3f29e2726522
Added basic support for ISO images for games that only have a data track
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52 context->current_sector_byte = -1; |
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53 context->current_subcode_byte = -1; |
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54 context->current_subcode_dest = 0; |
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55 } |
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56 |
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57 enum { |
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58 GAO_CDD_CTRL, |
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59 GAO_CDD_STATUS, |
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60 GAO_CDD_CMD = GAO_CDD_STATUS+5, |
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61 GAO_SUBCODE_ADDR = (0x68-0x36)/2, |
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62 GAO_SUBCODE_START = (0x100-0x36)/2 |
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63 }; |
2080 | 64 //GAO_CDD_CTRL |
65 #define BIT_MUTE 0x100 | |
66 #define BIT_HOCK 0x0004 | |
67 #define BIT_DRS 0x0002 | |
68 #define BIT_DTS 0x0001 | |
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69 |
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70 static uint8_t checksum(uint8_t *vbuffer) |
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71 { |
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72 uint8_t *buffer = vbuffer; |
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73 uint8_t sum = 0; |
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74 for (int i = 0; i < 9; i++) |
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75 { |
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76 sum += buffer[i]; |
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77 } |
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78 return (~sum) & 0xF; |
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79 } |
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80 |
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81 #define MIN_CIRCUMFERENCE 144.51f |
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82 #define MAX_CIRCUMFERENCE 364.42f |
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83 #define SECTOR_LENGTH 17.3333f |
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84 // max diameter for program area 116 mm |
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85 // circumference ~ 364.42 mm |
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86 // ~ 21 sectors per physical track at edge |
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87 // ~8 sectors per physical track at start of lead-in |
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88 #define COARSE_SEEK 2200 //made up numbers |
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89 #define FINE_SEEK 10 |
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90 static void handle_seek(cdd_mcu *context) |
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91 { |
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92 //TODO: more realistic seeking behavior |
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93 if (context->seeking) { |
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94 if (context->seek_pba == context->head_pba) { |
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95 context->seeking = 0; |
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96 if (context->status == DS_PAUSE) { |
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97 context->pause_pba = context->head_pba; |
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98 } |
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99 } else { |
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100 //TODO: better estimate of sectors per track at current head location |
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101 float circumference = (MAX_CIRCUMFERENCE-MIN_CIRCUMFERENCE) * ((float)context->head_pba) / (74 * 60 * SECTORS_PER_SECOND) + MIN_CIRCUMFERENCE; |
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102 float sectors_per_track = circumference / SECTOR_LENGTH; |
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103 uint32_t max_seek = sectors_per_track * 190; |
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104 uint32_t min_seek = sectors_per_track; |
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105 |
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106 |
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107 if (context->seek_pba > context->head_pba) { |
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108 uint32_t seek_amount; |
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109 for (seek_amount = max_seek; seek_amount >= min_seek; seek_amount >>= 1) |
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110 { |
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111 if (context->seek_pba - context->head_pba >= seek_amount) { |
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112 break; |
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113 } |
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114 } |
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115 if (seek_amount >= min_seek) { |
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116 context->head_pba += seek_amount; |
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117 } else { |
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118 context->head_pba++; |
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119 } |
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120 } else { |
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121 uint32_t seek_amount; |
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122 for (seek_amount = max_seek; seek_amount >= min_seek; seek_amount >>= 1) |
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|
123 { |
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124 if (context->head_pba - context->seek_pba >= seek_amount) { |
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125 break; |
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|
126 } |
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|
127 } |
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|
128 if (seek_amount >= min_seek) { |
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|
129 context->head_pba -= seek_amount; |
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|
130 } else if (context->head_pba >= min_seek){ |
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|
131 context->head_pba -= min_seek; |
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|
132 } else { |
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|
133 context->head_pba = 0; |
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|
134 } |
2064
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|
135 } |
2061
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|
136 } |
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|
137 } |
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|
138 } |
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|
139 |
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|
140 static void lba_to_status(cdd_mcu *context, uint32_t lba) |
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141 { |
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|
142 uint32_t seconds = lba / 75; |
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143 uint32_t frames = lba % 75; |
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144 uint32_t minutes = seconds / 60; |
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145 seconds = seconds % 60; |
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146 context->status_buffer.b.time.min_high = minutes / 10; |
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|
147 context->status_buffer.b.time.min_low = minutes % 10; |
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148 context->status_buffer.b.time.sec_high = seconds / 10; |
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|
149 context->status_buffer.b.time.sec_low = seconds % 10; |
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150 context->status_buffer.b.time.frame_high = frames / 10; |
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|
151 context->status_buffer.b.time.frame_low = frames % 10; |
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152 } |
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|
153 |
2080 | 154 static void update_status(cdd_mcu *context, uint16_t *gate_array) |
2061
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155 { |
2080 | 156 gate_array[GAO_CDD_CTRL] |= BIT_MUTE; |
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|
157 uint32_t prev_pba = context->head_pba; |
2061
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158 switch (context->status) |
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|
159 { |
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|
160 case DS_PLAY: |
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|
161 handle_seek(context); |
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162 if (!context->seeking) { |
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|
163 context->head_pba++; |
2081
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Initial stab at RF5C164 emulation
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2080
diff
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|
164 } |
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diff
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|
165 if (context->head_pba >= LEADIN_SECTORS) { |
2080 | 166 uint8_t track = context->media->seek(context->media, context->head_pba - LEADIN_SECTORS); |
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|
167 if (!context->seeking && context->media->tracks[track].type == TRACK_AUDIO) { |
2080 | 168 gate_array[GAO_CDD_CTRL] &= ~BIT_MUTE; |
169 } | |
2061
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|
170 } |
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|
171 break; |
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|
172 case DS_PAUSE: |
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|
173 handle_seek(context); |
2095
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|
174 if (!context->seeking) { |
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|
175 context->head_pba++; |
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diff
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|
176 if (context->head_pba > context->pause_pba + FINE_SEEK) { |
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|
177 context->head_pba = context->pause_pba - FINE_SEEK; |
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178 if (context->head_pba < LEADIN_SECTORS) { |
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|
179 context->head_pba = LEADIN_SECTORS; |
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180 } |
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|
181 } |
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diff
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|
182 } |
2084
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2081
diff
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|
183 if (context->head_pba >= LEADIN_SECTORS) { |
2117
03304d350339
Set force-mute when CD drive is in the pause state
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2116
diff
changeset
|
184 context->media->seek(context->media, context->head_pba - LEADIN_SECTORS); |
2084
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2081
diff
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|
185 } |
2061
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Implemented basic TOC functionality of CDD MCU
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diff
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|
186 break; |
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diff
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|
187 case DS_TOC_READ: |
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diff
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|
188 handle_seek(context); |
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diff
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|
189 if (!context->seeking) { |
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Implemented basic TOC functionality of CDD MCU
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diff
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|
190 context->head_pba++; |
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Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
191 if (context->media && context->media->type == MEDIA_CDROM && context->media->num_tracks) { |
2079
5a2b759f6b2d
BIOS doesn't like it if TOC read happens too quickly
Michael Pavone <pavone@retrodev.com>
parents:
2078
diff
changeset
|
192 if (context->head_pba > 3*(context->media->num_tracks + 2)) { |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
193 context->toc_valid = 1; |
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Implemented basic TOC functionality of CDD MCU
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diff
changeset
|
194 context->seeking = 1; |
2095
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diff
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|
195 context->seek_pba = LEADIN_SECTORS + context->media->tracks[0].start_lba + context->media->tracks[0].fake_pregap; |
2061
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Implemented basic TOC functionality of CDD MCU
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diff
changeset
|
196 context->status = DS_PAUSE; |
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Implemented basic TOC functionality of CDD MCU
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diff
changeset
|
197 } |
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parents:
diff
changeset
|
198 |
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Implemented basic TOC functionality of CDD MCU
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diff
changeset
|
199 } else { |
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Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
200 context->status = DS_NO_DISC; |
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Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
201 } |
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Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
202 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
203 break; |
2084
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
204 case DS_TRACKING: |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
205 handle_seek(context); |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
206 if (!context->seeking) { |
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parents:
2081
diff
changeset
|
207 context->status = DS_PAUSE; |
2095
c732dcc9c61b
Better simulation of CDD pause behavior
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parents:
2089
diff
changeset
|
208 context->pause_pba = context->head_pba; |
2084
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
209 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
210 if (context->head_pba >= LEADIN_SECTORS) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
211 uint8_t track = context->media->seek(context->media, context->head_pba - LEADIN_SECTORS); |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
212 if (!context->seeking && context->media->tracks[track].type == TRACK_AUDIO) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
213 gate_array[GAO_CDD_CTRL] &= ~BIT_MUTE; |
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Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
214 } |
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Implement a couple more CDD commands force CDDA mute when seeking
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diff
changeset
|
215 } |
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Implement a couple more CDD commands force CDDA mute when seeking
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parents:
2081
diff
changeset
|
216 break; |
2061
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Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
217 } |
2124
ad346054ca78
Return "not ready" status sometimes when seeking. Fixes issues in multiple games
Michael Pavone <pavone@retrodev.com>
parents:
2122
diff
changeset
|
218 uint8_t force_not_ready = 0; |
ad346054ca78
Return "not ready" status sometimes when seeking. Fixes issues in multiple games
Michael Pavone <pavone@retrodev.com>
parents:
2122
diff
changeset
|
219 if (context->seeking && context->head_pba - prev_pba != 1) { |
ad346054ca78
Return "not ready" status sometimes when seeking. Fixes issues in multiple games
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parents:
2122
diff
changeset
|
220 //BIOS depends on getting a not ready status during seeking to clear certain state |
ad346054ca78
Return "not ready" status sometimes when seeking. Fixes issues in multiple games
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parents:
2122
diff
changeset
|
221 force_not_ready = context->status_buffer.format != SF_NOTREADY; |
ad346054ca78
Return "not ready" status sometimes when seeking. Fixes issues in multiple games
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parents:
2122
diff
changeset
|
222 } |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
223 if (context->first_cmd_received) { |
2124
ad346054ca78
Return "not ready" status sometimes when seeking. Fixes issues in multiple games
Michael Pavone <pavone@retrodev.com>
parents:
2122
diff
changeset
|
224 switch (force_not_ready ? SF_NOTREADY : context->requested_format) |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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2062
diff
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|
225 { |
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Get CDD working well enough to get into BIOS CD player
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2062
diff
changeset
|
226 case SF_ABSOLUTE: |
2115
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
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2100
diff
changeset
|
227 if (context->toc_valid && prev_pba >= LEADIN_SECTORS) { |
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
228 lba_to_status(context, prev_pba - LEADIN_SECTORS); |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
229 context->status_buffer.format = SF_ABSOLUTE; |
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diff
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|
230 } else { |
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Get CDD working well enough to get into BIOS CD player
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2062
diff
changeset
|
231 context->status_buffer.format = SF_NOTREADY; |
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Get CDD working well enough to get into BIOS CD player
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2062
diff
changeset
|
232 } |
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Get CDD working well enough to get into BIOS CD player
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2062
diff
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|
233 break; |
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Get CDD working well enough to get into BIOS CD player
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diff
changeset
|
234 case SF_RELATIVE: |
2115
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
235 if (context->toc_valid && prev_pba >= LEADIN_SECTORS) { |
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
236 uint32_t lba =prev_pba - LEADIN_SECTORS; |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
237 for (uint32_t i = 0; i < context->media->num_tracks; i++) |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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2062
diff
changeset
|
238 { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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2062
diff
changeset
|
239 if (lba < context->media->tracks[i].end_lba) { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
240 if (context->media->tracks[i].fake_pregap) { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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241 if (lba > context->media->tracks[i].fake_pregap) { |
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242 lba -= context->media->tracks[i].fake_pregap; |
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243 } else { |
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244 //relative time counts down to 0 in pregap |
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245 lba = context->media->tracks[i].fake_pregap - lba; |
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246 break; |
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247 } |
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248 } |
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249 if (lba < context->media->tracks[i].start_lba) { |
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250 //relative time counts down to 0 in pregap |
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251 lba = context->media->tracks[i].start_lba - lba; |
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252 } else { |
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253 lba -= context->media->tracks[i].start_lba; |
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254 } |
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255 break; |
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256 } else if (context->media->tracks[i].fake_pregap) { |
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257 lba -= context->media->tracks[i].fake_pregap; |
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258 } |
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259 } |
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260 lba_to_status(context, lba); |
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261 context->status_buffer.format = SF_RELATIVE; |
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262 } else { |
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263 context->status_buffer.format = SF_NOTREADY; |
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264 } |
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265 break; |
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266 case SF_TRACK: |
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267 if (context->toc_valid && prev_pba >= LEADIN_SECTORS) { |
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268 uint32_t lba =prev_pba - LEADIN_SECTORS; |
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269 uint32_t i; |
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270 for (i = 0; i < context->media->num_tracks; i++) |
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271 { |
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272 if (lba < context->media->tracks[i].end_lba) { |
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273 if (context->media->tracks[i].fake_pregap) { |
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274 if (lba > context->media->tracks[i].fake_pregap) { |
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275 lba -= context->media->tracks[i].fake_pregap; |
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276 } else { |
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277 //relative time counts down to 0 in pregap |
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278 lba = context->media->tracks[i].fake_pregap - lba; |
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279 break; |
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280 } |
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281 } |
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282 if (lba < context->media->tracks[i].start_lba) { |
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283 //relative time counts down to 0 in pregap |
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284 lba = context->media->tracks[i].start_lba - lba; |
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285 } else { |
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286 lba -= context->media->tracks[i].start_lba; |
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287 } |
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288 break; |
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289 } else if (context->media->tracks[i].fake_pregap) { |
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290 lba -= context->media->tracks[i].fake_pregap; |
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291 } |
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292 } |
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293 context->status_buffer.b.track.track_high = (i + 1) / 10; |
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294 context->status_buffer.b.track.track_low = (i + 1) % 10; |
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295 if (context->media->tracks[i].type == TRACK_DATA) { |
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296 context->status_buffer.b.track.control = 4; |
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297 } else { |
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298 //TODO: pre-emphasis flag |
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299 //TODO: copy permitted flag |
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300 context->status_buffer.b.track.control = 0; |
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301 } |
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302 context->status_buffer.b.track.adr = 1; |
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303 context->status_buffer.format = SF_TRACK; |
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304 } else { |
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305 context->status_buffer.format = SF_NOTREADY; |
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306 } |
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307 break; |
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308 case SF_TOCO: |
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309 if (context->toc_valid) { |
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310 uint32_t total_fake_pregap = 0; |
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311 for (uint32_t i = 0; i < context->media->num_tracks; i++) |
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312 { |
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313 total_fake_pregap += context->media->tracks[i].fake_pregap; |
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314 } |
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315 lba_to_status(context, context->media->tracks[context->media->num_tracks - 1].end_lba + total_fake_pregap); |
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316 context->status_buffer.format = SF_TOCO; |
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317 } else { |
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318 context->status_buffer.format = SF_NOTREADY; |
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319 } |
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320 break; |
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321 case SF_TOCT: |
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322 if (context->toc_valid) { |
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323 context->status_buffer.b.toct.first_track_high = 0; |
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324 context->status_buffer.b.toct.first_track_low = 1; |
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325 context->status_buffer.b.toct.last_track_high = (context->media->num_tracks) / 10; |
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326 context->status_buffer.b.toct.last_track_low = (context->media->num_tracks) % 10; |
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327 context->status_buffer.b.toct.version = 0; |
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328 context->status_buffer.format = SF_TOCT; |
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329 } else { |
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330 context->status_buffer.format = SF_NOTREADY; |
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331 } |
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332 break; |
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333 case SF_TOCN: |
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334 if (context->toc_valid) { |
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335 if (context->requested_track > context->media->num_tracks) { |
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336 printf("track number %d is bad\n", context->requested_track); |
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337 exit(0); |
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338 } |
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|
339 uint32_t lba = context->media->tracks[context->requested_track - 1].start_lba; |
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340 for (uint32_t i = 0; i < context->requested_track; i++) { |
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|
341 lba += context->media->tracks[i].fake_pregap; |
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342 } |
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|
343 lba_to_status(context, lba); |
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344 if (context->media->tracks[context->requested_track - 1].type == TRACK_DATA) { |
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345 context->status_buffer.b.tocn.frame_low |= 0x80; |
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346 } |
2064
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Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
347 context->status_buffer.b.tocn.track_low = context->requested_track % 10; |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
348 context->status_buffer.format = SF_TOCN; |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
349 } else { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
350 context->status_buffer.format = SF_NOTREADY; |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
351 } |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
352 break; |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
353 case SF_NOTREADY: |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
354 memset(&context->status_buffer, 0, sizeof(context->status_buffer) - 1); |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
355 context->status_buffer.format = SF_NOTREADY; |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
356 break; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
357 } |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
358 if (context->error_status == DS_STOP) { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
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parents:
2062
diff
changeset
|
359 if (context->requested_format >= SF_TOCO && context->requested_format <= SF_TOCN) { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
360 context->status_buffer.status = DS_TOC_READ; |
2084
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
361 } else if (context->seeking && context->status != DS_TRACKING) { |
2065
02a9846668d1
Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements
Michael Pavone <pavone@retrodev.com>
parents:
2064
diff
changeset
|
362 context->status_buffer.status = DS_SEEK; |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
363 } else { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
364 context->status_buffer.status = context->status; |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
365 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
366 } else { |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
367 context->status_buffer.status = context->error_status; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
368 context->status_buffer.format = SF_NOTREADY; |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
369 context->error_status = DS_STOP; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
370 } |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
371 if (context->requested_format != SF_TOCN) { |
2080 | 372 context->status_buffer.b.time.flags = !!(gate_array[GAO_CDD_CTRL] & BIT_MUTE); //TODO: populate these |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
373 } |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
374 } else { |
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
375 // Did not receive our first command so just send zeroes |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
376 memset(&context->status_buffer, 0, sizeof(context->status_buffer) - 1); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
377 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
378 context->status_buffer.checksum = checksum((uint8_t *)&context->status_buffer); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
379 if (context->status_buffer.format != SF_NOTREADY) { |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
380 printf("CDD Status %X%X.%X%X%X%X%X%X.%X%X\n", |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
381 context->status_buffer.status, context->status_buffer.format, |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
382 context->status_buffer.b.time.min_high, context->status_buffer.b.time.min_low, |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
383 context->status_buffer.b.time.sec_high, context->status_buffer.b.time.sec_low, |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
384 context->status_buffer.b.time.frame_high, context->status_buffer.b.time.frame_low, |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
385 context->status_buffer.b.time.flags, context->status_buffer.checksum |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
386 ); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
387 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
388 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
389 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
390 static void run_command(cdd_mcu *context) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
391 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
392 uint8_t check = checksum((uint8_t*)&context->cmd_buffer); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
393 if (check != context->cmd_buffer.checksum) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
394 context->error_status = DS_SUM_ERROR; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
395 return; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
396 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
397 if (context->cmd_buffer.must_be_zero) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
398 context->error_status = DS_CMD_ERROR; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
399 return; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
400 } |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
401 context->first_cmd_received = 1; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
402 switch (context->cmd_buffer.cmd_type) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
403 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
404 case CMD_NOP: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
405 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
406 case CMD_STOP: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
407 puts("CDD CMD: STOP"); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
408 context->status = DS_STOP; |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
409 context->requested_format = SF_ABSOLUTE; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
410 break; |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
411 case CMD_READ: |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
412 case CMD_SEEK: { |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
413 if (context->status == DS_DOOR_OPEN || context->status == DS_TRAY_MOVING || context->status == DS_DISC_LEADOUT || context->status == DS_DISC_LEADIN) { |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
414 context->error_status = DS_CMD_ERROR; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
415 break; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
416 } |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
417 if (context->requested_format == SF_TOCT || context->requested_format == SF_TOCN || context->requested_format == SF_TOCO) { |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
418 context->requested_format = SF_ABSOLUTE; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
419 } |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
420 if (!context->toc_valid) { |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
421 context->error_status = DS_CMD_ERROR; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
422 break; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
423 } |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
424 uint32_t lba = context->cmd_buffer.b.time.min_high * 10 + context->cmd_buffer.b.time.min_low; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
425 lba *= 60; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
426 lba += context->cmd_buffer.b.time.sec_high * 10 + context->cmd_buffer.b.time.sec_low; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
427 lba *= 75; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
428 lba += context->cmd_buffer.b.time.frame_high * 10 + context->cmd_buffer.b.time.frame_low; |
2067
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
429 printf("CDD CMD: %s cmd for lba %d, MM:SS:FF %u%u:%u%u:%u%u\n", |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
430 context->cmd_buffer.cmd_type == CMD_READ ? "READ" : "SEEK", lba, |
2065
02a9846668d1
Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements
Michael Pavone <pavone@retrodev.com>
parents:
2064
diff
changeset
|
431 context->cmd_buffer.b.time.min_high, context->cmd_buffer.b.time.min_low, |
02a9846668d1
Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements
Michael Pavone <pavone@retrodev.com>
parents:
2064
diff
changeset
|
432 context->cmd_buffer.b.time.sec_high, context->cmd_buffer.b.time.sec_low, |
02a9846668d1
Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements
Michael Pavone <pavone@retrodev.com>
parents:
2064
diff
changeset
|
433 context->cmd_buffer.b.time.frame_high, context->cmd_buffer.b.time.frame_low |
02a9846668d1
Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements
Michael Pavone <pavone@retrodev.com>
parents:
2064
diff
changeset
|
434 ); |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
435 if (lba >= context->media->tracks[0].fake_pregap + context->media->tracks[context->media->num_tracks - 1].end_lba) { |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
436 context->error_status = DS_CMD_ERROR; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
437 break; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
438 } |
2141
793715149f16
More accurate seek emulation
Michael Pavone <pavone@retrodev.com>
parents:
2139
diff
changeset
|
439 context->seek_pba = lba + LEADIN_SECTORS - 3; |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
440 context->seeking = 1; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
441 context->status = context->cmd_buffer.cmd_type == CMD_READ ? DS_PLAY : DS_PAUSE; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
442 break; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
443 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
444 case CMD_REPORT_REQUEST: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
445 switch (context->cmd_buffer.b.format.status_type) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
446 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
447 case SF_ABSOLUTE: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
448 case SF_RELATIVE: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
449 case SF_TRACK: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
450 context->requested_format = context->cmd_buffer.b.format.status_type; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
451 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
452 case SF_TOCO: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
453 if (context->toc_valid) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
454 context->requested_format = SF_TOCO; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
455 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
456 context->error_status = DS_CMD_ERROR; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
457 context->requested_format = SF_ABSOLUTE; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
458 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
459 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
460 case SF_TOCT: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
461 if (context->toc_valid) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
462 if (context->status == DS_STOP) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
463 context->status = DS_TOC_READ; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
464 context->seeking = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
465 context->seek_pba = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
466 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
467 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
468 context->status = DS_TOC_READ; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
469 context->seeking = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
470 context->seek_pba = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
471 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
472 context->requested_format = SF_TOCT; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
473 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
474 case SF_TOCN: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
475 context->requested_track = context->cmd_buffer.b.format.track_high * 10; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
476 context->requested_track += context->cmd_buffer.b.format.track_low; |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
477 if (!context->media || context->requested_track > context->media->num_tracks) { |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
478 context->requested_format = SF_ABSOLUTE; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
479 context->error_status = DS_CMD_ERROR; |
2073
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
480 break; |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
481 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
482 context->status = DS_TOC_READ; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
483 context->seeking = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
484 context->seek_pba = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
485 context->requested_format = SF_TOCN; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
486 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
487 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
488 printf("CDD CMD: REPORT REQUEST(%d), format set to %d\n", context->cmd_buffer.b.format.status_type, context->requested_format); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
489 break; |
2067
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
490 case CMD_PAUSE: |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
491 if (context->status == DS_DOOR_OPEN || context->status == DS_TRAY_MOVING || context->status == DS_DISC_LEADOUT || context->status == DS_DISC_LEADIN) { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
492 context->error_status = DS_CMD_ERROR; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
493 break; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
494 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
495 if (context->requested_format == SF_TOCT || context->requested_format == SF_TOCN) { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
496 context->requested_format = SF_ABSOLUTE; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
497 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
498 if (!context->toc_valid) { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
499 context->error_status = DS_CMD_ERROR; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
500 break; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
501 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
502 if (context->status == DS_STOP) { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
503 context->seeking = 1; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
504 context->seek_pba = LEADIN_SECTORS + context->media->tracks[0].fake_pregap + context->media->tracks[0].start_lba; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
505 printf("CDD CMD: PAUSE, seeking to %u\n", context->seek_pba); |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
506 } else { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
507 puts("CDD CMD: PAUSE"); |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
508 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
509 context->status = DS_PAUSE; |
2095
c732dcc9c61b
Better simulation of CDD pause behavior
Michael Pavone <pavone@retrodev.com>
parents:
2089
diff
changeset
|
510 if (!context->seeking) { |
c732dcc9c61b
Better simulation of CDD pause behavior
Michael Pavone <pavone@retrodev.com>
parents:
2089
diff
changeset
|
511 context->pause_pba = context->head_pba; |
c732dcc9c61b
Better simulation of CDD pause behavior
Michael Pavone <pavone@retrodev.com>
parents:
2089
diff
changeset
|
512 } |
2067
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
513 break; |
2084
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
514 case CMD_PLAY: |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
515 if (context->status == DS_DOOR_OPEN || context->status == DS_TRAY_MOVING || context->status == DS_DISC_LEADOUT || context->status == DS_DISC_LEADIN) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
516 context->error_status = DS_CMD_ERROR; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
517 break; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
518 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
519 if (context->requested_format == SF_TOCT || context->requested_format == SF_TOCN) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
520 context->requested_format = SF_ABSOLUTE; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
521 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
522 if (!context->toc_valid) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
523 context->error_status = DS_CMD_ERROR; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
524 break; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
525 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
526 if (context->status == DS_STOP || context->status == DS_TOC_READ) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
527 context->seeking = 1; |
2100
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
528 context->seek_pba = LEADIN_SECTORS + context->media->tracks[0].fake_pregap + context->media->tracks[0].start_lba - 4; |
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
529 printf("CDD CMD: PLAY, seeking to %u\n", context->seek_pba); |
2084
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
530 } else { |
2100
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
531 puts("CDD CMD: PLAY"); |
2084
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
532 } |
2100
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
533 context->status = DS_PLAY; |
2084
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
534 break; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
535 //TODO: CMD_FFWD, CMD_RWD |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
536 case CMD_TRACK_SKIP: |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
537 if (context->status != DS_PLAY && context->status != DS_PAUSE && context->status != DS_DISC_LEADOUT) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
538 context->error_status = DS_CMD_ERROR; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
539 break; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
540 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
541 if (context->requested_format == SF_TOCT || context->requested_format == SF_TOCN) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
542 context->requested_format = SF_ABSOLUTE; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
543 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
544 if (!context->toc_valid) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
545 context->error_status = DS_CMD_ERROR; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
546 break; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
547 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
548 { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
549 int32_t to_skip = context->cmd_buffer.b.skip.tracks_highest << 12 | context->cmd_buffer.b.skip.tracks_midhigh << 8 |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
550 | context->cmd_buffer.b.skip.tracks_midlow << 4 | context->cmd_buffer.b.skip.tracks_lowest; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
551 if (context->cmd_buffer.b.skip.direction) { |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
552 to_skip = -to_skip; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
553 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
554 printf("CDD CMD: TRACK_SKIP direction %u, num_tracks %i, delta %i\n", context->cmd_buffer.b.skip.direction, abs(to_skip), to_skip); |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
555 //circumference at 83mm point (roughly half way between inner and outer edge of program area) |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
556 //~ 260.75cm ~ 15 sectors |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
557 context->seek_pba = context->head_pba + to_skip * 15; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
558 context->seeking = 1; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
559 } |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
560 context->status = DS_TRACKING; |
c9d3b8e1ea56
Implement a couple more CDD commands force CDDA mute when seeking
Michael Pavone <pavone@retrodev.com>
parents:
2081
diff
changeset
|
561 break; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
562 default: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
563 printf("CDD CMD: Unimplemented(%d)\n", context->cmd_buffer.cmd_type); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
564 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
565 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
566 |
2080 | 567 void cdd_mcu_run(cdd_mcu *context, uint32_t cycle, uint16_t *gate_array, lc8951* cdc, cdd_fader* fader) |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
568 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
569 uint32_t cd_cycle = mclks_to_cd_block(cycle); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
570 if (!(gate_array[GAO_CDD_CTRL] & BIT_HOCK)) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
571 //it's a little unclear if this gates the actual cd block clock or just handshaking |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
572 //assum it's actually the clock for now |
2080 | 573 for (; context->cycle < cd_cycle; context->cycle += CDD_MCU_DIVIDER) { |
2089
0db3af42dd72
Fix some byte order stuff for audio tracks
Michael Pavone <pavone@retrodev.com>
parents:
2084
diff
changeset
|
574 if (context->cycle >= context->next_byte_cycle) { |
2080 | 575 cdd_fader_data(fader, 0); |
2130
28b6453cf7e3
Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset
Michael Pavone <pavone@retrodev.com>
parents:
2124
diff
changeset
|
576 lc8951_write_byte(cdc, cd_block_to_mclks(context->cycle), 0, 0); |
2089
0db3af42dd72
Fix some byte order stuff for audio tracks
Michael Pavone <pavone@retrodev.com>
parents:
2084
diff
changeset
|
577 context->next_byte_cycle += BYTE_CLOCKS; |
2080 | 578 } |
579 } | |
580 gate_array[GAO_CDD_CTRL] |= BIT_MUTE; | |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
581 return; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
582 } |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
583 uint32_t next_subcode = context->last_sector_cycle + SECTOR_CLOCKS; |
2115
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
584 uint32_t next_nibble; |
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
585 if (context->current_status_nibble > 0) { |
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
586 next_nibble = context->last_nibble_cycle + NIBBLE_CLOCKS; |
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
587 } else if (!context->current_status_nibble) { |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
588 next_nibble = context->last_sector_cycle + PROCESSING_DELAY; |
2115
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
589 } else { |
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
590 next_nibble = CYCLE_NEVER; |
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
591 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
592 uint32_t next_cmd_nibble = context->current_cmd_nibble >= 0 ? context->last_nibble_cycle + NIBBLE_CLOCKS : CYCLE_NEVER; |
2080 | 593 |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
594 for (; context->cycle < cd_cycle; context->cycle += CDD_MCU_DIVIDER) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
changeset
|
595 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 if (context->cycle >= next_subcode) { |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
597 context->last_sector_cycle = context->cycle; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
598 next_subcode = context->cycle + SECTOR_CLOCKS; |
2080 | 599 update_status(context, gate_array); |
2115
e93ced356a21
Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
2100
diff
changeset
|
600 next_nibble = context->cycle + PROCESSING_DELAY; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
601 context->current_status_nibble = 0; |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
602 if (context->next_subcode_int_cycle != CYCLE_NEVER) { |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
603 context->subcode_int_pending = 1; |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
604 } |
2142
d9151d0894c7
Fix some CD-ROM emulation issues
Michael Pavone <pavone@retrodev.com>
parents:
2141
diff
changeset
|
605 if ((context->status == DS_PLAY || context->status == DS_PAUSE) && context->head_pba >= LEADIN_SECTORS && !context->seeking) { |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
606 context->current_sector_byte = 0; |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
607 context->current_subcode_byte = 0; |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
608 context->next_subcode_cycle = context->cycle; |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
609 context->next_subcode_int_cycle = cd_block_to_mclks(next_subcode); |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
610 } else { |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
611 context->next_subcode_int_cycle = CYCLE_NEVER; |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
612 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
613 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
614 if (context->cycle >= next_nibble) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
615 if (context->current_status_nibble == sizeof(cdd_status)) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
616 context->current_status_nibble = -1; |
2139
11a3d5b00a66
Fix DRS and DTS bits of CDD status
Michael Pavone <pavone@retrodev.com>
parents:
2130
diff
changeset
|
617 gate_array[GAO_CDD_CTRL] &= ~BIT_DRS; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
618 if (context->cmd_recv_pending) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
619 context->cmd_recv_pending = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
620 context->current_cmd_nibble = 0; |
2139
11a3d5b00a66
Fix DRS and DTS bits of CDD status
Michael Pavone <pavone@retrodev.com>
parents:
2130
diff
changeset
|
621 gate_array[GAO_CDD_CTRL] |= BIT_DTS; |
2075
983f57d08eff
Fix a couple of CDD bugs
Michael Pavone <pavone@retrodev.com>
parents:
2073
diff
changeset
|
622 next_cmd_nibble = context->cycle + NIBBLE_CLOCKS; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
623 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
624 context->cmd_recv_wait = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
625 } |
2075
983f57d08eff
Fix a couple of CDD bugs
Michael Pavone <pavone@retrodev.com>
parents:
2073
diff
changeset
|
626 next_nibble = CYCLE_NEVER; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
627 } else { |
2139
11a3d5b00a66
Fix DRS and DTS bits of CDD status
Michael Pavone <pavone@retrodev.com>
parents:
2130
diff
changeset
|
628 gate_array[GAO_CDD_CTRL] |= BIT_DRS; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
629 uint8_t value = ((uint8_t *)&context->status_buffer)[context->current_status_nibble]; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
630 int ga_index = GAO_CDD_STATUS + (context->current_status_nibble >> 1); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
631 if (context->current_status_nibble & 1) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
632 gate_array[ga_index] = value | (gate_array[ga_index] & 0xFF00); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
633 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
634 gate_array[ga_index] = (value << 8) | (gate_array[ga_index] & 0x00FF); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
635 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
636 if (context->current_status_nibble == 7) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
637 context->int_pending = 1; |
2078
c534a3199020
Fix CDD int cycle calculation
Michael Pavone <pavone@retrodev.com>
parents:
2076
diff
changeset
|
638 context->next_int_cycle = cd_block_to_mclks(context->cycle + SECTOR_CLOCKS); |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
639 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
640 context->current_status_nibble++; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
641 context->last_nibble_cycle = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
642 next_nibble = context->cycle + NIBBLE_CLOCKS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
643 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
644 } else if (context->cycle >= next_cmd_nibble) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
645 if (context->current_cmd_nibble == sizeof(cdd_cmd)) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
646 next_cmd_nibble = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
647 context->current_cmd_nibble = -1; |
2139
11a3d5b00a66
Fix DRS and DTS bits of CDD status
Michael Pavone <pavone@retrodev.com>
parents:
2130
diff
changeset
|
648 gate_array[GAO_CDD_CTRL] &= ~BIT_DTS; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
649 run_command(context); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
650 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
651 int ga_index = GAO_CDD_CMD + (context->current_cmd_nibble >> 1); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
652 uint8_t value = (context->current_cmd_nibble & 1) ? gate_array[ga_index] : gate_array[ga_index] >> 8; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
653 ((uint8_t *)&context->cmd_buffer)[context->current_cmd_nibble] = value; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
654 context->current_cmd_nibble++; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
655 context->last_nibble_cycle = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
656 next_cmd_nibble = context->cycle + NIBBLE_CLOCKS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
657 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
658 } |
2089
0db3af42dd72
Fix some byte order stuff for audio tracks
Michael Pavone <pavone@retrodev.com>
parents:
2084
diff
changeset
|
659 if (context->cycle >= context->next_byte_cycle) { |
2100
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
660 if (context->current_sector_byte >= 0 && (!fader->byte_counter || context->current_sector_byte)) { |
2080 | 661 uint8_t byte = context->media->read(context->media, context->current_sector_byte); |
662 lc8951_write_byte(cdc, cd_block_to_mclks(context->cycle), context->current_sector_byte++, byte); | |
663 cdd_fader_data(fader, gate_array[GAO_CDD_CTRL] & BIT_MUTE ? 0 : byte); | |
664 } else { | |
2130
28b6453cf7e3
Emulate CDC sync detection and sync insertion rather than relying on external knowledge about sector offset
Michael Pavone <pavone@retrodev.com>
parents:
2124
diff
changeset
|
665 lc8951_write_byte(cdc, cd_block_to_mclks(context->cycle), 0, 0); |
2080 | 666 cdd_fader_data(fader, 0); |
2100
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
667 if (context->current_sector_byte >= 0) { |
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
668 next_subcode += BYTE_CLOCKS; |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
669 context->last_sector_cycle += BYTE_CLOCKS; |
2100
539450d905b3
Fix CDD PLAY command and CDD fader sample alignment
Michael Pavone <pavone@retrodev.com>
parents:
2096
diff
changeset
|
670 } |
2080 | 671 } |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
672 if (context->current_sector_byte == 2352) { |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
673 context->current_sector_byte = -1; |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
674 } |
2089
0db3af42dd72
Fix some byte order stuff for audio tracks
Michael Pavone <pavone@retrodev.com>
parents:
2084
diff
changeset
|
675 context->next_byte_cycle += BYTE_CLOCKS; |
2062
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents:
2061
diff
changeset
|
676 } |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
677 if (context->cycle >= context->next_subcode_cycle) { |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
678 uint8_t byte; |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
679 if (!context->current_subcode_byte) { |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
680 byte = 0x9F; |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
681 //This probably happens after the second sync symbol, but doing it here simplifies things a little |
cd057d6fe030
Initial stab at subcode emulation
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682 context->current_subcode_dest &= 0x7E; |
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Initial stab at subcode emulation
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683 gate_array[GAO_SUBCODE_ADDR] = (context->current_subcode_dest - 96) & 0x7E; |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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684 } else if (context->current_subcode_byte == 1) { |
cd057d6fe030
Initial stab at subcode emulation
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685 byte = 0xFD; |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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686 } else { |
cd057d6fe030
Initial stab at subcode emulation
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687 byte = context->media->read_subcodes(context->media, context->current_subcode_byte - 2); |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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688 } |
cd057d6fe030
Initial stab at subcode emulation
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689 int offset = GAO_SUBCODE_START + (context->current_subcode_dest >> 1); |
cd057d6fe030
Initial stab at subcode emulation
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690 if (context->current_subcode_dest & 1) { |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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691 gate_array[offset] &= 0xFF00; |
cd057d6fe030
Initial stab at subcode emulation
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692 gate_array[offset] |= byte; |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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693 } else { |
cd057d6fe030
Initial stab at subcode emulation
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694 gate_array[offset] &= 0x00FF; |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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695 gate_array[offset] |= byte << 8; |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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696 } |
cd057d6fe030
Initial stab at subcode emulation
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parents:
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697 context->current_subcode_byte++; |
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Initial stab at subcode emulation
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698 if (context->current_subcode_byte == 98) { |
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Initial stab at subcode emulation
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699 context->current_subcode_byte = 0; |
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Initial stab at subcode emulation
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700 } else if (context->current_subcode_byte == 32) { |
cd057d6fe030
Initial stab at subcode emulation
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701 gate_array[GAO_SUBCODE_ADDR] |= 0x80; |
cd057d6fe030
Initial stab at subcode emulation
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702 } |
cd057d6fe030
Initial stab at subcode emulation
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703 context->current_subcode_dest++; |
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Initial stab at subcode emulation
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704 context->current_subcode_dest &= 0x7F; |
cd057d6fe030
Initial stab at subcode emulation
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705 context->next_subcode_cycle += SUBCODE_CLOCKS; |
cd057d6fe030
Initial stab at subcode emulation
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706 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
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|
707 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
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708 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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709 |
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Implemented basic TOC functionality of CDD MCU
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710 void cdd_mcu_start_cmd_recv(cdd_mcu *context, uint16_t *gate_array) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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|
711 { |
2139
11a3d5b00a66
Fix DRS and DTS bits of CDD status
Michael Pavone <pavone@retrodev.com>
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2130
diff
changeset
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712 if (gate_array[GAO_CDD_CTRL] & BIT_DTS) { |
11a3d5b00a66
Fix DRS and DTS bits of CDD status
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713 return; |
11a3d5b00a66
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714 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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715 if (context->cmd_recv_wait) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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716 context->current_cmd_nibble = 0; |
2139
11a3d5b00a66
Fix DRS and DTS bits of CDD status
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parents:
2130
diff
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717 gate_array[GAO_CDD_CTRL] |= BIT_DTS; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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718 context->last_nibble_cycle = context->cycle; |
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Implemented basic TOC functionality of CDD MCU
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719 context->cmd_recv_wait = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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720 } else { |
7c1760b5b3e5
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diff
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721 context->cmd_recv_pending = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
722 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
723 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
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|
724 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
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diff
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|
725 void cdd_hock_enabled(cdd_mcu *context) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
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726 { |
2116
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Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
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727 context->last_sector_cycle = context->cycle; |
2115
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Hopefully more accurate relative timing of CDD status and data reaching the CDC
Michael Pavone <pavone@retrodev.com>
parents:
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728 context->next_int_cycle = cd_block_to_mclks(context->cycle + SECTOR_CLOCKS + PROCESSING_DELAY + 7 * NIBBLE_CLOCKS); |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
729 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
730 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
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diff
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731 void cdd_hock_disabled(cdd_mcu *context) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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diff
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|
732 { |
2116
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733 context->last_sector_cycle = CYCLE_NEVER; |
2061
7c1760b5b3e5
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parents:
diff
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|
734 context->next_int_cycle = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
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diff
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|
735 context->last_nibble_cycle = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
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diff
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|
736 context->current_status_nibble = -1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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diff
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|
737 context->current_cmd_nibble = -1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
738 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
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|
739 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
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|
740 void cdd_mcu_adjust_cycle(cdd_mcu *context, uint32_t deduction) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
741 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
742 uint32_t cd_deduction = mclks_to_cd_block(deduction); |
2073
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
743 if (context->cycle > cd_deduction) { |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
744 context->cycle -= cd_deduction; |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
745 } else { |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
746 context->cycle = 0; |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
747 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
748 if (context->next_int_cycle != CYCLE_NEVER) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
749 context->next_int_cycle -= deduction; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
750 } |
2116
cd057d6fe030
Initial stab at subcode emulation
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parents:
2115
diff
changeset
|
751 if (context->last_sector_cycle != CYCLE_NEVER) { |
cd057d6fe030
Initial stab at subcode emulation
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parents:
2115
diff
changeset
|
752 if (context->last_sector_cycle > cd_deduction) { |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
753 context->last_sector_cycle -= cd_deduction; |
2073
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
754 } else { |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
755 context->last_sector_cycle = 0; |
2073
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
756 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
757 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
758 if (context->last_nibble_cycle != CYCLE_NEVER) { |
2073
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
759 if (context->last_nibble_cycle > cd_deduction) { |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
760 context->last_nibble_cycle -= cd_deduction; |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
761 } else { |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
762 context->last_nibble_cycle = 0; |
c69e42444f96
Fix some cycle adjustment stuff and an off-by one on hte TOCT response
Michael Pavone <pavone@retrodev.com>
parents:
2067
diff
changeset
|
763 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
764 } |
2096
460c93c19146
Fix CDD byte cycle counter deduction that got broken when I fixed the off-by-one on CD-DA
Michael Pavone <pavone@retrodev.com>
parents:
2095
diff
changeset
|
765 context->next_byte_cycle -= cd_deduction; |
2116
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
766 if (context->next_subcode_cycle != CYCLE_NEVER) { |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
767 context->next_subcode_cycle -= cd_deduction; |
cd057d6fe030
Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents:
2115
diff
changeset
|
768 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
769 } |