| 1 | /* |
| 2 | * should better do some pointer stuff here. But as none of these bankswitch |
| 3 | * while the game runs, memcpy will suffice. |
| 4 | */ |
| 5 | |
| 6 | #include "../PicoInt.h" |
| 7 | |
| 8 | |
| 9 | /* 12-in-1 and 4-in-1. Assuming 2MB ROMs here. */ |
| 10 | static unsigned int carthw_12in1_read16(unsigned int a, int realsize) |
| 11 | { |
| 12 | // ?? |
| 13 | elprintf(EL_UIO, "12-in-1: read [%06x] @ %06x", a, SekPc); |
| 14 | return 0; |
| 15 | } |
| 16 | |
| 17 | static void carthw_12in1_write8(unsigned int a, unsigned int d, int realsize) |
| 18 | { |
| 19 | int len; |
| 20 | |
| 21 | if (a < 0xA13000 || a >= 0xA13040) { |
| 22 | /* 4-in-1 has Real Deal Boxing, which uses serial eeprom, |
| 23 | * but I really doubt that pirate cart had it */ |
| 24 | if (a != 0x200001) |
| 25 | elprintf(EL_ANOMALY, "12-in-1: unexpected write [%06x] %02x @ %06x", a, d, SekPc); |
| 26 | return; |
| 27 | } |
| 28 | |
| 29 | a &= 0x3f; a <<= 16; |
| 30 | len = Pico.romsize - a; |
| 31 | if (len <= 0) { |
| 32 | elprintf(EL_ANOMALY, "12-in-1: missing bank @ %06x", a); |
| 33 | return; |
| 34 | } |
| 35 | |
| 36 | memcpy(Pico.rom, Pico.rom + Pico.romsize + a, len); |
| 37 | } |
| 38 | |
| 39 | static void carthw_12in1_reset(void) |
| 40 | { |
| 41 | carthw_12in1_write8(0xA13000, 0, 0); |
| 42 | } |
| 43 | |
| 44 | void carthw_12in1_startup(void) |
| 45 | { |
| 46 | void *tmp; |
| 47 | |
| 48 | elprintf(EL_STATUS, "12-in-1 mapper detected"); |
| 49 | |
| 50 | tmp = realloc(Pico.rom, Pico.romsize * 2); |
| 51 | if (tmp == NULL) |
| 52 | { |
| 53 | elprintf(EL_STATUS, "OOM"); |
| 54 | return; |
| 55 | } |
| 56 | Pico.rom = tmp; |
| 57 | memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize); |
| 58 | |
| 59 | PicoRead16Hook = carthw_12in1_read16; |
| 60 | PicoWrite8Hook = carthw_12in1_write8; |
| 61 | PicoResetHook = carthw_12in1_reset; |
| 62 | } |
| 63 | |
| 64 | |
| 65 | /* Realtec, based on TascoDLX doc |
| 66 | * http://www.sharemation.com/TascoDLX/REALTEC%20Cart%20Mapper%20-%20description%20v1.txt |
| 67 | */ |
| 68 | static int realtec_bank = 0x80000000, realtec_size = 0x80000000; |
| 69 | static int realtec_romsize = 0; |
| 70 | |
| 71 | static void carthw_realtec_write8(unsigned int a, unsigned int d, int realsize) |
| 72 | { |
| 73 | int i, bank_old = realtec_bank, size_old = realtec_size; |
| 74 | |
| 75 | if (a == 0x400000) |
| 76 | { |
| 77 | realtec_bank &= 0x0e0000; |
| 78 | realtec_bank |= 0x300000 & (d << 19); |
| 79 | if (realtec_bank != bank_old) |
| 80 | elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc); |
| 81 | } |
| 82 | else if (a == 0x402000) |
| 83 | { |
| 84 | realtec_size = (d << 17) & 0x3e0000; |
| 85 | if (realtec_size != size_old) |
| 86 | elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc); |
| 87 | } |
| 88 | else if (a == 0x404000) |
| 89 | { |
| 90 | realtec_bank &= 0x300000; |
| 91 | realtec_bank |= 0x0e0000 & (d << 17); |
| 92 | if (realtec_bank != bank_old) |
| 93 | elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc); |
| 94 | } |
| 95 | else |
| 96 | elprintf(EL_ANOMALY, "realtec: unexpected write [%06x] %02x @ %06x", a, d, SekPc); |
| 97 | |
| 98 | if (realtec_bank >= 0 && realtec_size >= 0 && |
| 99 | (realtec_bank != bank_old || realtec_size != size_old)) |
| 100 | { |
| 101 | elprintf(EL_ANOMALY, "realtec: new bank %06x, size %06x", realtec_bank, realtec_size, SekPc); |
| 102 | if (realtec_size > realtec_romsize - realtec_bank || realtec_bank >= realtec_romsize) |
| 103 | { |
| 104 | elprintf(EL_ANOMALY, "realtec: bank too large / out of range?"); |
| 105 | return; |
| 106 | } |
| 107 | |
| 108 | for (i = 0; i < 0x400000; i += realtec_size) |
| 109 | memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_bank, realtec_size); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | void carthw_realtec_reset(void) |
| 114 | { |
| 115 | int i; |
| 116 | /* map boot code */ |
| 117 | for (i = 0; i < 0x400000; i += 0x2000) |
| 118 | memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_romsize - 0x2000, 0x2000); |
| 119 | realtec_bank = realtec_size = 0x80000000; |
| 120 | } |
| 121 | |
| 122 | void carthw_realtec_startup(void) |
| 123 | { |
| 124 | void *tmp; |
| 125 | |
| 126 | elprintf(EL_STATUS, "Realtec mapper detected"); |
| 127 | |
| 128 | realtec_romsize = Pico.romsize; |
| 129 | Pico.romsize = 0x400000; |
| 130 | tmp = realloc(Pico.rom, 0x400000 + realtec_romsize); |
| 131 | if (tmp == NULL) |
| 132 | { |
| 133 | elprintf(EL_STATUS, "OOM"); |
| 134 | return; |
| 135 | } |
| 136 | Pico.rom = tmp; |
| 137 | memcpy(Pico.rom + 0x400000, Pico.rom, realtec_romsize); |
| 138 | |
| 139 | PicoWrite8Hook = carthw_realtec_write8; |
| 140 | PicoResetHook = carthw_realtec_reset; |
| 141 | } |
| 142 | |