| 1 | /* |
| 2 | * Support for a few cart mappers. |
| 3 | * |
| 4 | * (c) Copyright 2008, Grazvydas "notaz" Ignotas |
| 5 | * Free for non-commercial use. |
| 6 | * |
| 7 | * |
| 8 | * I should better do some pointer stuff here. But as none of these bankswitch |
| 9 | * while the game runs, memcpy will suffice. |
| 10 | */ |
| 11 | |
| 12 | #include "../pico_int.h" |
| 13 | |
| 14 | |
| 15 | /* 12-in-1 and 4-in-1. Assuming >= 2MB ROMs here. */ |
| 16 | static unsigned int carthw_12in1_baddr = 0; |
| 17 | |
| 18 | static carthw_state_chunk carthw_12in1_state[] = |
| 19 | { |
| 20 | { CHUNK_CARTHW, sizeof(carthw_12in1_baddr), &carthw_12in1_baddr }, |
| 21 | { 0, 0, NULL } |
| 22 | }; |
| 23 | |
| 24 | static unsigned int carthw_12in1_read16(unsigned int a, int realsize) |
| 25 | { |
| 26 | // ?? |
| 27 | elprintf(EL_UIO, "12-in-1: read [%06x] @ %06x", a, SekPc); |
| 28 | return 0; |
| 29 | } |
| 30 | |
| 31 | static void carthw_12in1_write8(unsigned int a, unsigned int d, int realsize) |
| 32 | { |
| 33 | int len; |
| 34 | |
| 35 | if (a < 0xA13000 || a >= 0xA13040) { |
| 36 | /* 4-in-1 has Real Deal Boxing, which uses serial eeprom, |
| 37 | * but I really doubt that pirate cart had it */ |
| 38 | if (a != 0x200001) |
| 39 | elprintf(EL_ANOMALY, "12-in-1: unexpected write [%06x] %02x @ %06x", a, d, SekPc); |
| 40 | return; |
| 41 | } |
| 42 | |
| 43 | carthw_12in1_baddr = a; |
| 44 | a &= 0x3f; a <<= 16; |
| 45 | len = Pico.romsize - a; |
| 46 | if (len <= 0) { |
| 47 | elprintf(EL_ANOMALY|EL_STATUS, "12-in-1: missing bank @ %06x", a); |
| 48 | return; |
| 49 | } |
| 50 | |
| 51 | memcpy(Pico.rom, Pico.rom + Pico.romsize + a, len); |
| 52 | } |
| 53 | |
| 54 | static void carthw_12in1_reset(void) |
| 55 | { |
| 56 | carthw_12in1_write8(0xA13000, 0, 0); |
| 57 | } |
| 58 | |
| 59 | static void carthw_12in1_statef(void) |
| 60 | { |
| 61 | carthw_12in1_write8(carthw_12in1_baddr, 0, 0); |
| 62 | } |
| 63 | |
| 64 | void carthw_12in1_startup(void) |
| 65 | { |
| 66 | void *tmp; |
| 67 | |
| 68 | elprintf(EL_STATUS, "12-in-1 mapper detected"); |
| 69 | |
| 70 | tmp = realloc(Pico.rom, Pico.romsize * 2); |
| 71 | if (tmp == NULL) |
| 72 | { |
| 73 | elprintf(EL_STATUS, "OOM"); |
| 74 | return; |
| 75 | } |
| 76 | Pico.rom = tmp; |
| 77 | memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize); |
| 78 | |
| 79 | PicoRead16Hook = carthw_12in1_read16; |
| 80 | PicoWrite8Hook = carthw_12in1_write8; |
| 81 | PicoResetHook = carthw_12in1_reset; |
| 82 | PicoLoadStateHook = carthw_12in1_statef; |
| 83 | carthw_chunks = carthw_12in1_state; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | /* Realtec, based on TascoDLX doc |
| 88 | * http://www.sharemation.com/TascoDLX/REALTEC%20Cart%20Mapper%20-%20description%20v1.txt |
| 89 | */ |
| 90 | static int realtec_bank = 0x80000000, realtec_size = 0x80000000; |
| 91 | static int realtec_romsize = 0; |
| 92 | |
| 93 | static void carthw_realtec_write8(unsigned int a, unsigned int d, int realsize) |
| 94 | { |
| 95 | int i, bank_old = realtec_bank, size_old = realtec_size; |
| 96 | |
| 97 | if (a == 0x400000) |
| 98 | { |
| 99 | realtec_bank &= 0x0e0000; |
| 100 | realtec_bank |= 0x300000 & (d << 19); |
| 101 | if (realtec_bank != bank_old) |
| 102 | elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc); |
| 103 | } |
| 104 | else if (a == 0x402000) |
| 105 | { |
| 106 | realtec_size = (d << 17) & 0x3e0000; |
| 107 | if (realtec_size != size_old) |
| 108 | elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc); |
| 109 | } |
| 110 | else if (a == 0x404000) |
| 111 | { |
| 112 | realtec_bank &= 0x300000; |
| 113 | realtec_bank |= 0x0e0000 & (d << 17); |
| 114 | if (realtec_bank != bank_old) |
| 115 | elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc); |
| 116 | } |
| 117 | else |
| 118 | elprintf(EL_ANOMALY, "realtec: unexpected write [%06x] %02x @ %06x", a, d, SekPc); |
| 119 | |
| 120 | if (realtec_bank >= 0 && realtec_size >= 0 && |
| 121 | (realtec_bank != bank_old || realtec_size != size_old)) |
| 122 | { |
| 123 | elprintf(EL_ANOMALY, "realtec: new bank %06x, size %06x", realtec_bank, realtec_size, SekPc); |
| 124 | if (realtec_size > realtec_romsize - realtec_bank || realtec_bank >= realtec_romsize) |
| 125 | { |
| 126 | elprintf(EL_ANOMALY, "realtec: bank too large / out of range?"); |
| 127 | return; |
| 128 | } |
| 129 | |
| 130 | for (i = 0; i < 0x400000; i += realtec_size) |
| 131 | memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_bank, realtec_size); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | static void carthw_realtec_reset(void) |
| 136 | { |
| 137 | int i; |
| 138 | /* map boot code */ |
| 139 | for (i = 0; i < 0x400000; i += 0x2000) |
| 140 | memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_romsize - 0x2000, 0x2000); |
| 141 | realtec_bank = realtec_size = 0x80000000; |
| 142 | } |
| 143 | |
| 144 | void carthw_realtec_startup(void) |
| 145 | { |
| 146 | void *tmp; |
| 147 | |
| 148 | elprintf(EL_STATUS, "Realtec mapper detected"); |
| 149 | |
| 150 | realtec_romsize = Pico.romsize; |
| 151 | Pico.romsize = 0x400000; |
| 152 | tmp = realloc(Pico.rom, 0x400000 + realtec_romsize); |
| 153 | if (tmp == NULL) |
| 154 | { |
| 155 | elprintf(EL_STATUS, "OOM"); |
| 156 | return; |
| 157 | } |
| 158 | Pico.rom = tmp; |
| 159 | memcpy(Pico.rom + 0x400000, Pico.rom, realtec_romsize); |
| 160 | |
| 161 | PicoWrite8Hook = carthw_realtec_write8; |
| 162 | PicoResetHook = carthw_realtec_reset; |
| 163 | } |
| 164 | |
| 165 | /* Radica mapper, based on DevSter's info |
| 166 | * http://devster.monkeeh.com/sega/radica/ |
| 167 | */ |
| 168 | static unsigned int carthw_radica_baddr = 0; |
| 169 | |
| 170 | static carthw_state_chunk carthw_radica_state[] = |
| 171 | { |
| 172 | { CHUNK_CARTHW, sizeof(carthw_radica_baddr), &carthw_radica_baddr }, |
| 173 | { 0, 0, NULL } |
| 174 | }; |
| 175 | |
| 176 | static unsigned int carthw_radica_read16(unsigned int a, int realsize) |
| 177 | { |
| 178 | if ((a & 0xffff80) != 0xa13000) { |
| 179 | elprintf(EL_UIO, "radica: r16 %06x", a); |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | carthw_radica_baddr = a; |
| 184 | a = (a & 0x7e) << 15; |
| 185 | if (a >= Pico.romsize) { |
| 186 | elprintf(EL_ANOMALY|EL_STATUS, "radica: missing bank @ %06x", a); |
| 187 | return 0; |
| 188 | } |
| 189 | memcpy(Pico.rom, Pico.rom + Pico.romsize + a, Pico.romsize - a); |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static void carthw_radica_statef(void) |
| 195 | { |
| 196 | carthw_radica_read16(carthw_radica_baddr, 0); |
| 197 | } |
| 198 | |
| 199 | static void carthw_radica_reset(void) |
| 200 | { |
| 201 | memcpy(Pico.rom, Pico.rom + Pico.romsize, Pico.romsize); |
| 202 | } |
| 203 | |
| 204 | void carthw_radica_startup(void) |
| 205 | { |
| 206 | void *tmp; |
| 207 | |
| 208 | elprintf(EL_STATUS, "Radica mapper detected"); |
| 209 | |
| 210 | tmp = realloc(Pico.rom, Pico.romsize * 2); |
| 211 | if (tmp == NULL) |
| 212 | { |
| 213 | elprintf(EL_STATUS, "OOM"); |
| 214 | return; |
| 215 | } |
| 216 | Pico.rom = tmp; |
| 217 | memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize); |
| 218 | |
| 219 | PicoRead16Hook = carthw_radica_read16; |
| 220 | PicoResetHook = carthw_radica_reset; |
| 221 | PicoLoadStateHook = carthw_radica_statef; |
| 222 | carthw_chunks = carthw_radica_state; |
| 223 | } |
| 224 | |
| 225 | |