Mercurial > repos > blastem
annotate cdd_mcu.c @ 2069:8e51c0c3f2e3 segacd
Initial attempt at implementing the Sega CD graphics hardware
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 30 Jan 2022 19:55:33 -0800 |
parents | f22e04b69272 |
children | c69e42444f96 |
rev | line source |
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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 |
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7 #define SECTOR_CLOCKS (CD_BLOCK_CLKS/75) |
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8 #define NIBBLE_CLOCKS (CDD_MCU_DIVIDER * 77) |
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9 #define BYTE_CLOCKS (SECTOR_CLOCKS/2352) // 96 |
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10 |
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11 //lead in start max diameter 46 mm |
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12 //program area start max diameter 50 mm |
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13 //difference 4 mm = 4000 um |
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14 //radius difference 2 mm = 2000 um |
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15 //track pitch 1.6 um |
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16 //1250 physical tracks in between |
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17 //linear speed 1.2 m/s - 1.4 m/s |
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18 // 1.3 m = 1300 mm |
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19 // circumference at 46 mm ~ 144.51 mm |
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20 // circumference at 50 mm ~ 157.08 mm |
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21 // avg is 150.795 |
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22 // 75 sectors per second |
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23 // 17.3333 mm "typical" length of a sector |
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24 // ~8.7 sectors per track in lead-in area |
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25 #define LEADIN_SECTORS 10875 |
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26 |
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27 static uint32_t cd_block_to_mclks(uint32_t cycles) |
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28 { |
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29 return ((uint64_t)cycles) * ((uint64_t)SCD_MCLKS) / ((uint64_t)CD_BLOCK_CLKS); |
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30 } |
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31 |
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32 static uint32_t mclks_to_cd_block(uint32_t cycles) |
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33 { |
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34 return ((uint64_t)cycles) * ((uint64_t)CD_BLOCK_CLKS) / ((uint64_t)SCD_MCLKS); |
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35 } |
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36 |
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37 void cdd_mcu_init(cdd_mcu *context, system_media *media) |
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38 { |
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39 context->next_int_cycle = CYCLE_NEVER; |
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40 context->last_subcode_cycle = CYCLE_NEVER; |
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41 context->last_nibble_cycle = CYCLE_NEVER; |
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42 context->requested_format = SF_NOTREADY; |
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43 context->media = media; |
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44 context->current_status_nibble = -1; |
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45 context->current_cmd_nibble = -1; |
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46 } |
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47 |
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48 enum { |
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49 GAO_CDD_CTRL, |
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50 GAO_CDD_STATUS, |
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51 GAO_CDD_CMD = GAO_CDD_STATUS+5 |
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52 }; |
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53 |
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54 static uint8_t checksum(uint8_t *vbuffer) |
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55 { |
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56 uint8_t *buffer = vbuffer; |
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57 uint8_t sum = 0; |
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58 for (int i = 0; i < 9; i++) |
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59 { |
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60 sum += buffer[i]; |
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61 } |
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62 return (~sum) & 0xF; |
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63 } |
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64 #define COARSE_SEEK 2200 //made up numbers |
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65 #define FINE_SEEK 10 |
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66 static void handle_seek(cdd_mcu *context) |
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67 { |
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68 //TODO: more realistic seeking behavior |
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69 if (context->seeking) { |
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70 if (context->seek_pba == context->head_pba) { |
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71 context->seeking = 0; |
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72 } else if (context->seek_pba > context->head_pba) { |
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73 if (context->seek_pba - context->head_pba >= COARSE_SEEK) { |
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74 context->head_pba += COARSE_SEEK; |
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75 } else if (context->seek_pba - context->head_pba >= FINE_SEEK) { |
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76 context->head_pba += FINE_SEEK; |
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77 } else { |
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78 context->head_pba++; |
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79 } |
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80 } else { |
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81 if (context->head_pba - context->seek_pba >= COARSE_SEEK) { |
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82 context->head_pba -= COARSE_SEEK; |
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83 } else if (context->head_pba >= FINE_SEEK) { |
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84 context->head_pba -= FINE_SEEK; |
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85 } else { |
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86 context->head_pba = 0; |
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87 } |
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88 } |
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89 } |
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90 } |
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91 |
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92 static void lba_to_status(cdd_mcu *context, uint32_t lba) |
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93 { |
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94 uint32_t seconds = lba / 75; |
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95 uint32_t frames = lba % 75; |
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96 uint32_t minutes = seconds / 60; |
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97 seconds = seconds % 60; |
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98 context->status_buffer.b.time.min_high = minutes / 10; |
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99 context->status_buffer.b.time.min_low = minutes % 10; |
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100 context->status_buffer.b.time.sec_high = seconds / 10; |
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101 context->status_buffer.b.time.sec_low = seconds % 10; |
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102 context->status_buffer.b.time.frame_high = frames / 10; |
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103 context->status_buffer.b.time.frame_low = frames % 10; |
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104 } |
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105 |
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106 static void update_status(cdd_mcu *context) |
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107 { |
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108 switch (context->status) |
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109 { |
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110 case DS_PLAY: |
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111 handle_seek(context); |
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112 if (!context->seeking) { |
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113 context->head_pba++; |
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114 uint32_t lba = context->head_pba - LEADIN_SECTORS; |
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115 for (uint32_t i = 0; i < context->media->num_tracks; i++) |
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116 { |
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Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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117 if (lba < context->media->tracks[i].fake_pregap) { |
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Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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|
118 context->in_fake_pregap = 1; |
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Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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|
119 break; |
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Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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|
120 } |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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|
121 lba -= context->media->tracks[i].fake_pregap; |
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Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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122 if (lba < context->media->tracks[i].start_lba) { |
07ed42bd7b4c
Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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|
123 context->in_fake_pregap = 1; |
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Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
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124 break; |
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|
125 } |
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126 if (lba < context->media->tracks[i].end_lba) { |
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127 fseek(context->media->f, lba * 2352, SEEK_SET); |
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128 context->in_fake_pregap = 0; |
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129 break; |
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130 } |
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|
131 } |
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132 } |
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133 break; |
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134 case DS_PAUSE: |
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135 handle_seek(context); |
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|
136 break; |
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137 case DS_TOC_READ: |
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|
138 handle_seek(context); |
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|
139 if (!context->seeking) { |
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|
140 context->head_pba++; |
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141 if (context->media && context->media->type == MEDIA_CDROM && context->media->num_tracks) { |
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142 if (context->head_pba > 3*context->media->num_tracks + 1) { |
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|
143 context->toc_valid = 1; |
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|
144 context->seeking = 1; |
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|
145 context->seek_pba = LEADIN_SECTORS + context->media->tracks[0].start_lba; |
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|
146 context->status = DS_PAUSE; |
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|
147 } |
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|
148 |
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149 } else { |
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|
150 context->status = DS_NO_DISC; |
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|
151 } |
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|
152 } |
7c1760b5b3e5
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|
153 break; |
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|
154 |
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|
155 } |
2064
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156 if (context->first_cmd_received) { |
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|
157 switch (context->requested_format) |
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|
158 { |
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|
159 case SF_ABSOLUTE: |
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|
160 if (context->toc_valid && context->head_pba >= LEADIN_SECTORS) { |
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|
161 lba_to_status(context, context->head_pba - LEADIN_SECTORS); |
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162 context->status_buffer.format = SF_ABSOLUTE; |
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163 } else { |
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|
164 context->status_buffer.format = SF_NOTREADY; |
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|
165 } |
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diff
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|
166 break; |
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|
167 case SF_RELATIVE: |
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|
168 if (context->toc_valid && context->head_pba >= LEADIN_SECTORS) { |
2064
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changeset
|
169 uint32_t lba =context->head_pba - LEADIN_SECTORS; |
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|
170 for (uint32_t i = 0; i < context->media->num_tracks; i++) |
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|
171 { |
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172 if (lba < context->media->tracks[i].end_lba) { |
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173 if (context->media->tracks[i].fake_pregap) { |
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|
174 if (lba > context->media->tracks[i].fake_pregap) { |
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diff
changeset
|
175 lba -= context->media->tracks[i].fake_pregap; |
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|
176 } else { |
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|
177 //relative time counts down to 0 in pregap |
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|
178 lba = context->media->tracks[i].fake_pregap - lba; |
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diff
changeset
|
179 break; |
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|
180 } |
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|
181 } |
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|
182 if (lba < context->media->tracks[i].start_lba) { |
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|
183 //relative time counts down to 0 in pregap |
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diff
changeset
|
184 lba = context->media->tracks[i].start_lba - lba; |
2061
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Implemented basic TOC functionality of CDD MCU
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diff
changeset
|
185 } else { |
2064
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Get CDD working well enough to get into BIOS CD player
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diff
changeset
|
186 lba -= context->media->tracks[i].start_lba; |
2061
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parents:
diff
changeset
|
187 } |
2064
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parents:
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diff
changeset
|
188 break; |
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diff
changeset
|
189 } else if (context->media->tracks[i].fake_pregap) { |
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diff
changeset
|
190 lba -= context->media->tracks[i].fake_pregap; |
2061
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parents:
diff
changeset
|
191 } |
2064
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diff
changeset
|
192 } |
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diff
changeset
|
193 lba_to_status(context, lba); |
2065
02a9846668d1
Implement transfer of data from CDC to elsewhere. Other miscellaneous CDD/CDC improvements
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diff
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|
194 context->status_buffer.format = SF_RELATIVE; |
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|
195 } else { |
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|
196 context->status_buffer.format = SF_NOTREADY; |
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diff
changeset
|
197 } |
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diff
changeset
|
198 break; |
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diff
changeset
|
199 case SF_TRACK: |
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diff
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|
200 if (context->toc_valid && context->head_pba >= LEADIN_SECTORS) { |
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diff
changeset
|
201 uint32_t lba =context->head_pba - LEADIN_SECTORS; |
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changeset
|
202 uint32_t i; |
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|
203 for (i = 0; i < context->media->num_tracks; i++) |
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diff
changeset
|
204 { |
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diff
changeset
|
205 if (lba < context->media->tracks[i].end_lba) { |
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diff
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|
206 if (context->media->tracks[i].fake_pregap) { |
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diff
changeset
|
207 if (lba > context->media->tracks[i].fake_pregap) { |
02a9846668d1
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diff
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|
208 lba -= context->media->tracks[i].fake_pregap; |
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diff
changeset
|
209 } else { |
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diff
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|
210 //relative time counts down to 0 in pregap |
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diff
changeset
|
211 lba = context->media->tracks[i].fake_pregap - lba; |
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changeset
|
212 break; |
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|
213 } |
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diff
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|
214 } |
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|
215 if (lba < context->media->tracks[i].start_lba) { |
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|
216 //relative time counts down to 0 in pregap |
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217 lba = context->media->tracks[i].start_lba - lba; |
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|
218 } else { |
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219 lba -= context->media->tracks[i].start_lba; |
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|
220 } |
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diff
changeset
|
221 break; |
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|
222 } else if (context->media->tracks[i].fake_pregap) { |
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|
223 lba -= context->media->tracks[i].fake_pregap; |
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224 } |
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225 } |
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226 context->status_buffer.b.track.track_high = (i + 1) / 10; |
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227 context->status_buffer.b.track.track_low = (i + 1) % 10; |
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228 if (context->media->tracks[i].type == TRACK_DATA) { |
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229 context->status_buffer.b.track.control = 4; |
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230 } else { |
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231 //TODO: pre-emphasis flag |
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232 //TODO: copy permitted flag |
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233 context->status_buffer.b.track.control = 0; |
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234 } |
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235 context->status_buffer.b.track.adr = 1; |
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236 context->status_buffer.format = SF_TRACK; |
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237 } else { |
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238 context->status_buffer.format = SF_NOTREADY; |
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239 } |
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240 break; |
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241 case SF_TOCO: |
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242 if (context->toc_valid) { |
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243 uint32_t total_fake_pregap = 0; |
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244 for (uint32_t i = 0; i < context->media->num_tracks; i++) |
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245 { |
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246 total_fake_pregap += context->media->tracks[i].fake_pregap; |
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247 } |
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248 lba_to_status(context, context->media->tracks[context->media->num_tracks - 1].end_lba + total_fake_pregap); |
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249 context->status_buffer.format = SF_TOCO; |
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250 } else { |
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251 context->status_buffer.format = SF_NOTREADY; |
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252 } |
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253 break; |
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254 case SF_TOCT: |
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255 if (context->toc_valid) { |
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256 context->status_buffer.b.toct.first_track_high = 0; |
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257 context->status_buffer.b.toct.first_track_low = 1; |
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258 context->status_buffer.b.toct.last_track_high = (context->media->num_tracks + 1) / 10; |
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259 context->status_buffer.b.toct.last_track_low = (context->media->num_tracks + 1) % 10; |
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260 context->status_buffer.b.toct.version = 0; |
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261 context->status_buffer.format = SF_TOCT; |
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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_TOCN: |
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267 if (context->toc_valid) { |
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268 uint32_t lba = context->media->tracks[context->requested_track - 1].start_lba; |
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269 for (uint32_t i = 0; i < context->requested_track; i++) { |
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270 lba += context->media->tracks[i].fake_pregap; |
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271 } |
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272 lba_to_status(context, lba); |
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273 if (context->media->tracks[context->requested_track - 1].type == TRACK_DATA) { |
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274 context->status_buffer.b.tocn.frame_low |= 0x80; |
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275 } |
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276 context->status_buffer.b.tocn.track_low = context->requested_track % 10; |
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277 context->status_buffer.format = SF_TOCN; |
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278 } else { |
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279 context->status_buffer.format = SF_NOTREADY; |
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280 } |
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281 break; |
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282 case SF_NOTREADY: |
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283 memset(&context->status_buffer, 0, sizeof(context->status_buffer) - 1); |
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284 context->status_buffer.format = SF_NOTREADY; |
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285 break; |
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286 } |
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287 if (context->error_status == DS_STOP) { |
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288 if (context->requested_format >= SF_TOCO && context->requested_format <= SF_TOCN) { |
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289 context->status_buffer.status = DS_TOC_READ; |
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290 } else if (context->seeking) { |
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291 context->status_buffer.status = DS_SEEK; |
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292 } else { |
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293 context->status_buffer.status = context->status; |
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294 } |
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295 } else { |
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296 context->status_buffer.status = context->error_status; |
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297 context->status_buffer.format = SF_NOTREADY; |
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298 context->error_status = DS_STOP; |
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299 } |
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300 if (context->requested_format != SF_TOCN) { |
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301 context->status_buffer.b.time.flags = 1; //TODO: populate these |
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302 } |
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303 } else { |
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304 // Did not receive our first command so just send zeroes |
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305 memset(&context->status_buffer, 0, sizeof(context->status_buffer) - 1); |
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306 } |
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307 context->status_buffer.checksum = checksum((uint8_t *)&context->status_buffer); |
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308 if (context->status_buffer.format != SF_NOTREADY) { |
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309 printf("CDD Status %X%X.%X%X%X%X%X%X.%X%X\n", |
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310 context->status_buffer.status, context->status_buffer.format, |
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311 context->status_buffer.b.time.min_high, context->status_buffer.b.time.min_low, |
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312 context->status_buffer.b.time.sec_high, context->status_buffer.b.time.sec_low, |
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313 context->status_buffer.b.time.frame_high, context->status_buffer.b.time.frame_low, |
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314 context->status_buffer.b.time.flags, context->status_buffer.checksum |
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315 ); |
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316 } |
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317 } |
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318 |
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319 static void run_command(cdd_mcu *context) |
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320 { |
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321 uint8_t check = checksum((uint8_t*)&context->cmd_buffer); |
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322 printf("cmd %X, checksum: %X, calc: %X\n", context->cmd_buffer.cmd_type, context->cmd_buffer.checksum, check); |
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323 if (check != context->cmd_buffer.checksum) { |
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324 context->error_status = DS_SUM_ERROR; |
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325 return; |
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326 } |
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327 if (context->cmd_buffer.must_be_zero) { |
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328 context->error_status = DS_CMD_ERROR; |
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329 return; |
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330 } |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
331 context->first_cmd_received = 1; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
332 switch (context->cmd_buffer.cmd_type) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
333 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
334 case CMD_NOP: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
335 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
336 case CMD_STOP: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
337 puts("CDD CMD: STOP"); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
338 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
|
339 context->requested_format = SF_ABSOLUTE; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
340 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
|
341 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
|
342 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
|
343 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
|
344 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
|
345 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
|
346 } |
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
|
347 if (context->requested_format == SF_TOCT || context->requested_format == SF_TOCN) { |
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
|
348 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
|
349 } |
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
|
350 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
|
351 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
|
352 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
|
353 } |
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
|
354 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
|
355 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
|
356 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
|
357 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
|
358 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
|
359 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
|
360 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
|
361 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
|
362 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
|
363 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
|
364 ); |
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
|
365 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
|
366 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
|
367 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
|
368 } |
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
|
369 context->seek_pba = lba + LEADIN_SECTORS - 4; |
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
|
370 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
|
371 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
|
372 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
|
373 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
374 case CMD_REPORT_REQUEST: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
375 switch (context->cmd_buffer.b.format.status_type) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
376 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
377 case SF_ABSOLUTE: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
378 case SF_RELATIVE: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
379 case SF_TRACK: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
380 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
|
381 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
382 case SF_TOCO: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
383 if (context->toc_valid) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
384 context->requested_format = SF_TOCO; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
385 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
386 context->error_status = DS_CMD_ERROR; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
387 context->requested_format = SF_ABSOLUTE; |
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 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
390 case SF_TOCT: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
391 if (context->toc_valid) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
392 if (context->status == DS_STOP) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
393 context->status = DS_TOC_READ; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
394 context->seeking = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
395 context->seek_pba = 0; |
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 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
398 context->status = DS_TOC_READ; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
399 context->seeking = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
400 context->seek_pba = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
401 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
402 context->requested_format = SF_TOCT; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
403 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
404 case SF_TOCN: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
405 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
|
406 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
|
407 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
|
408 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
|
409 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
|
410 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
411 context->status = DS_TOC_READ; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
412 context->seeking = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
413 context->seek_pba = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
414 context->requested_format = SF_TOCN; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
415 break; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
416 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
417 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
|
418 break; |
2067
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
419 case CMD_PAUSE: |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
420 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
|
421 context->error_status = DS_CMD_ERROR; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
422 break; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
423 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
424 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
|
425 context->requested_format = SF_ABSOLUTE; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
426 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
427 if (!context->toc_valid) { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
428 context->error_status = DS_CMD_ERROR; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
429 break; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
430 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
431 if (context->status == DS_STOP) { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
432 context->seeking = 1; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
433 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
|
434 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
|
435 } else { |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
436 puts("CDD CMD: PAUSE"); |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
437 } |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
438 context->status = DS_PAUSE; |
f22e04b69272
More CDC/CDD improvements
Michael Pavone <pavone@retrodev.com>
parents:
2065
diff
changeset
|
439 break; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
440 default: |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
441 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
|
442 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
443 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
444 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
445 #define BIT_HOCK 0x4 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
446 #define BIT_DRS 0x2 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
447 #define BIT_DTS 0x1 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
448 |
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
|
449 void cdd_mcu_run(cdd_mcu *context, uint32_t cycle, uint16_t *gate_array, lc8951* cdc) |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
450 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
451 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
|
452 if (!(gate_array[GAO_CDD_CTRL] & BIT_HOCK)) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
453 //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
|
454 //assum it's actually the clock for now |
2064
91e4d2fe5cd9
Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents:
2062
diff
changeset
|
455 context->cycle = cd_cycle; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
456 return; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
457 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
458 uint32_t next_subcode = context->last_subcode_cycle + SECTOR_CLOCKS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
459 uint32_t next_nibble = context->current_status_nibble >= 0 ? context->last_nibble_cycle + NIBBLE_CLOCKS : CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
460 uint32_t next_cmd_nibble = context->current_cmd_nibble >= 0 ? context->last_nibble_cycle + NIBBLE_CLOCKS : 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
|
461 uint32_t next_byte = context->current_sector_byte >= 0 ? context->last_byte_cycle + BYTE_CLOCKS : CYCLE_NEVER; |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
462 for (; context->cycle < cd_cycle; context->cycle += CDD_MCU_DIVIDER) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
463 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
464 if (context->cycle >= next_subcode) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
465 context->last_subcode_cycle = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
466 next_subcode = context->cycle + SECTOR_CLOCKS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
467 update_status(context); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
468 next_nibble = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
469 context->current_status_nibble = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
470 gate_array[GAO_CDD_STATUS] |= BIT_DRS; |
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
|
471 if (context->status == DS_PLAY && !context->seeking) { |
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
|
472 next_byte = context->cycle; |
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
|
473 context->current_sector_byte = 0; |
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
|
474 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
475 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
476 if (context->cycle >= next_nibble) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
477 if (context->current_status_nibble == sizeof(cdd_status)) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
478 context->current_status_nibble = -1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
479 gate_array[GAO_CDD_STATUS] &= ~BIT_DRS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
480 if (context->cmd_recv_pending) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
481 context->cmd_recv_pending = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
482 context->current_cmd_nibble = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
483 gate_array[GAO_CDD_STATUS] |= BIT_DTS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
484 next_nibble = context->cycle + NIBBLE_CLOCKS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
485 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
486 context->cmd_recv_wait = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
487 next_nibble = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
488 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
489 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
490 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
|
491 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
|
492 if (context->current_status_nibble & 1) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
493 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
|
494 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
495 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
|
496 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
497 if (context->current_status_nibble == 7) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
498 context->int_pending = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
499 context->next_int_cycle = cd_block_to_mclks(cycle + SECTOR_CLOCKS); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
500 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
501 context->current_status_nibble++; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
502 context->last_nibble_cycle = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
503 next_nibble = context->cycle + NIBBLE_CLOCKS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
504 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
505 } else if (context->cycle >= next_cmd_nibble) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
506 if (context->current_cmd_nibble == sizeof(cdd_cmd)) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
507 next_cmd_nibble = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
508 context->current_cmd_nibble = -1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
509 gate_array[GAO_CDD_STATUS] &= ~BIT_DTS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
510 run_command(context); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
511 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
512 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
|
513 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
|
514 ((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
|
515 context->current_cmd_nibble++; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
516 context->last_nibble_cycle = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
517 next_cmd_nibble = context->cycle + NIBBLE_CLOCKS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
518 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
519 } |
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
|
520 if (context->cycle >= next_byte) { |
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
|
521 uint8_t byte; |
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
|
522 if (context->in_fake_pregap) { |
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
|
523 if (!context->current_sector_byte || (context->current_sector_byte >= 16)) { |
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
|
524 byte = 0; |
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
|
525 //TODO: error detection and correction bytes |
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
|
526 } else if (context->current_sector_byte < 12) { |
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
|
527 byte = 0xFF; |
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
|
528 } else if (context->current_sector_byte == 12) { |
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
|
529 uint32_t minute = ((context->head_pba - LEADIN_SECTORS) / 75) / 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
|
530 byte = (minute % 10) | ((minute / 10 ) << 4); |
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
|
531 } else if (context->current_sector_byte == 13) { |
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
|
532 uint32_t seconds = ((context->head_pba - LEADIN_SECTORS) / 75) % 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
|
533 byte = (seconds % 10) | ((seconds / 10 ) << 4); |
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
|
534 } else if (context->current_sector_byte == 14) { |
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
|
535 uint32_t frames = (context->head_pba - LEADIN_SECTORS) % 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
|
536 byte = (frames % 10) | ((frames / 10 ) << 4); |
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
|
537 } else { |
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
|
538 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
|
539 } |
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
|
540 } else { |
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
|
541 byte = fgetc(context->media->f); |
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
|
542 } |
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
|
543 lc8951_write_byte(cdc, cd_block_to_mclks(context->cycle), context->current_sector_byte++, byte); |
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
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544 context->last_byte_cycle = context->cycle; |
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
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545 next_byte = context->cycle + BYTE_CLOCKS; |
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
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546 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
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547 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
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548 |
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
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549 } |
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
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550 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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551 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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552 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
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553 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
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554 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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parents:
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555 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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556 if (context->cmd_recv_wait) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
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557 context->current_cmd_nibble = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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558 gate_array[GAO_CDD_STATUS] |= BIT_DTS; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
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559 context->last_nibble_cycle = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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diff
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560 context->cmd_recv_wait = 0; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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561 } else { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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562 context->cmd_recv_pending = 1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
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563 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
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
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566 void cdd_hock_enabled(cdd_mcu *context) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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567 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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568 context->last_subcode_cycle = context->cycle; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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569 context->next_int_cycle = cd_block_to_mclks(context->cycle + SECTOR_CLOCKS + 7 * NIBBLE_CLOCKS); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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570 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
571 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
572 void cdd_hock_disabled(cdd_mcu *context) |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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573 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
574 context->last_subcode_cycle = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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575 context->next_int_cycle = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
576 context->last_nibble_cycle = CYCLE_NEVER; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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577 context->current_status_nibble = -1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
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parents:
diff
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|
578 context->current_cmd_nibble = -1; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
579 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
580 |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
581 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
changeset
|
582 { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
583 uint32_t cd_deduction = mclks_to_cd_block(deduction); |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
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|
584 if (context->next_int_cycle != CYCLE_NEVER) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
585 context->next_int_cycle -= deduction; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
586 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
587 if (context->last_subcode_cycle != CYCLE_NEVER) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
588 context->last_subcode_cycle -= cd_deduction; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
589 } |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
590 if (context->last_nibble_cycle != CYCLE_NEVER) { |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
591 context->last_nibble_cycle -= cd_deduction; |
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
592 } |
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
|
593 if (context->last_byte_cycle != CYCLE_NEVER) { |
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
|
594 context->last_byte_cycle -= cd_deduction; |
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
|
595 } |
2061
7c1760b5b3e5
Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
596 } |