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annotate cdd_mcu.h @ 2496:187bc857a76a default tip

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Fix bug in MED mapper protection bit implementation
author Michael Pavone <pavone@retrodev.com>
date Sun, 28 Apr 2024 23:33:11 -0700
parents 9ead0fe69d9b
children
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1 #ifndef CDD_MCU_H_
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2 #define CDD_MCU_H_
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3 #include "system.h"
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4 #include "lc8951.h"
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5 #include "cdd_fader.h"
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6 #include "serialize.h"
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7
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8 typedef enum {
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9 SF_ABSOLUTE,
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10 SF_RELATIVE,
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11 SF_TRACK,
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12 SF_TOCO,
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13 SF_TOCT,
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14 SF_TOCN,
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15 SF_E,
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16 SF_NOTREADY = 0xF
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17 } status_format;
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18
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19 typedef enum {
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20 CMD_NOP,
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21 CMD_STOP,
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22 CMD_REPORT_REQUEST,
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23 CMD_READ,
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24 CMD_SEEK,
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25 CMD_INVALID,
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26 CMD_PAUSE,
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27 CMD_PLAY,
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28 CMD_FFWD,
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29 CMD_RWD,
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30 CMD_TRACK_SKIP,
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31 CMD_TRACK_CUE,
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32 CMD_DOOR_CLOSE,
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33 CMD_DOOR_OPEN
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34 } host_cmd;
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35
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36 typedef enum {
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37 DS_STOP,
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38 DS_PLAY,
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39 DS_SEEK,
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40 DS_SCAN,
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41 DS_PAUSE,
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42 DS_DOOR_OPEN,
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43 DS_SUM_ERROR,
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44 DS_CMD_ERROR,
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45 DS_FUNC_ERROR,
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46 DS_TOC_READ,
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47 DS_TRACKING,
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48 DS_NO_DISC,
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49 DS_DISC_LEADOUT,
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50 DS_DISC_LEADIN,
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51 DS_TRAY_MOVING,
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52 } drive_status;
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53
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54
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55 typedef struct {
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56 uint8_t status;
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57 uint8_t format;
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58 union {
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59 struct {
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60 uint8_t min_high;
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61 uint8_t min_low;
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62 uint8_t sec_high;
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63 uint8_t sec_low;
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64 uint8_t frame_high;
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65 uint8_t frame_low;
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66 uint8_t flags;
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67 } time;
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68 struct {
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69 uint8_t track_high;
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70 uint8_t track_low;
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71 uint8_t padding0;
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72 uint8_t padding1;
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73 uint8_t control;
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74 uint8_t adr;
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75 uint8_t flags;
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76 } track;
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77 struct {
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78 uint8_t first_track_high;
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79 uint8_t first_track_low;
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80 uint8_t last_track_high;
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81 uint8_t last_track_low;
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82 uint8_t version;
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83 uint8_t padding;
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84 uint8_t flags;
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85 } toct;
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86 struct {
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87 uint8_t min_high;
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88 uint8_t min_low;
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89 uint8_t sec_high;
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90 uint8_t sec_low;
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91 uint8_t frame_high;
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92 uint8_t frame_low;
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93 uint8_t track_low;
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94 } tocn;
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95 struct {
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96 } error;
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97 } b;
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98 uint8_t checksum;
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99 } cdd_status;
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100
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101 typedef struct {
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102 uint8_t cmd_type;
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103 uint8_t must_be_zero;
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104 union {
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105 struct {
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106 uint8_t min_high;
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107 uint8_t min_low;
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108 uint8_t sec_high;
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109 uint8_t sec_low;
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110 uint8_t frame_high;
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111 uint8_t frame_low;
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112 } time;
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113 struct {
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114 uint8_t padding;
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115 uint8_t status_type;
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116 uint8_t track_high;
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117 uint8_t track_low;
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118 } format;
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119 struct {
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120 uint8_t padding;
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121 uint8_t direction;
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122 uint8_t tracks_highest;
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123 uint8_t tracks_midhigh;
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124 uint8_t tracks_midlow;
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125 uint8_t tracks_lowest;
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126 } skip;
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127 struct {
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128 uint8_t track_high;
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129 uint8_t track_low;
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130 } track;
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131 } b;
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132 uint8_t padding;
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133 uint8_t checksum;
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134 } cdd_cmd;
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135
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136 typedef struct {
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137 system_media *media;
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138 uint32_t cycle; //this is in CD block CLKS
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139 uint32_t next_int_cycle; //this is in SCD MCLKS
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140 uint32_t next_subcode_int_cycle;
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parents: 2095
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141 uint32_t last_sector_cycle;
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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142 uint32_t last_nibble_cycle;
2089
0db3af42dd72 Fix some byte order stuff for audio tracks
Michael Pavone <pavone@retrodev.com>
parents: 2080
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143 uint32_t next_byte_cycle;
2116
cd057d6fe030 Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents: 2095
diff changeset
144 uint32_t next_subcode_cycle;
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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145 int current_status_nibble;
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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146 int current_cmd_nibble;
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
147 int current_sector_byte;
2116
cd057d6fe030 Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents: 2095
diff changeset
148 int current_subcode_byte;
cd057d6fe030 Initial stab at subcode emulation
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parents: 2095
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149 int current_subcode_dest;
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
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150 uint32_t head_pba;
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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parents:
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151 uint32_t seek_pba;
2095
c732dcc9c61b Better simulation of CDD pause behavior
Michael Pavone <pavone@retrodev.com>
parents: 2089
diff changeset
152 uint32_t pause_pba;
2152
c3ee42c89b27 More accurate seek times and basic emulation of extended time between CDD interrupts during coarse seeking
Michael Pavone <pavone@retrodev.com>
parents: 2116
diff changeset
153 uint32_t coarse_seek;
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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parents:
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154 cdd_status status_buffer;
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parents:
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155 cdd_cmd cmd_buffer;
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156 status_format requested_format;
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157 drive_status status;
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parents:
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158 drive_status error_status;
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159 uint8_t requested_track;
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parents:
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160 uint8_t cmd_recv_wait;
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161 uint8_t cmd_recv_pending;
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents:
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162 uint8_t int_pending;
2116
cd057d6fe030 Initial stab at subcode emulation
Michael Pavone <pavone@retrodev.com>
parents: 2095
diff changeset
163 uint8_t subcode_int_pending;
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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parents:
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164 uint8_t toc_valid;
2064
91e4d2fe5cd9 Get CDD working well enough to get into BIOS CD player
Michael Pavone <pavone@retrodev.com>
parents: 2062
diff changeset
165 uint8_t first_cmd_received;
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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parents:
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166 uint8_t 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
167 uint8_t in_fake_pregap;
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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parents:
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168 } cdd_mcu;
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169
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170 void cdd_mcu_init(cdd_mcu *context, system_media *media);
2080
bafb757e1cd2 Implement CD audio
Michael Pavone <pavone@retrodev.com>
parents: 2065
diff changeset
171 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
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parents:
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172 void cdd_hock_enabled(cdd_mcu *context);
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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parents:
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173 void cdd_hock_disabled(cdd_mcu *context);
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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174 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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175 void cdd_mcu_adjust_cycle(cdd_mcu *context, uint32_t deduction);
2280
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2152
diff changeset
176 void cdd_mcu_serialize(cdd_mcu *context, serialize_buffer *buf);
9ead0fe69d9b Implement savestate support for Sega CD
Michael Pavone <pavone@retrodev.com>
parents: 2152
diff changeset
177 void cdd_mcu_deserialize(deserialize_buffer *buf, void *vcontext);
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
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parents:
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178
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179 #endif //CD_MCU_H_