#include #include #include #include "gb.h" const GB_cartridge_t GB_cart_defs[256] = { // From http://gbdev.gg8.se/wiki/articles/The_Cartridge_Header#0147_-_Cartridge_Type /* MBC SUBTYPE RAM BAT. RTC RUMB. */ { GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 00h ROM ONLY { GB_MBC1 , GB_STANDARD_MBC, false, false, false, false}, // 01h MBC1 { GB_MBC1 , GB_STANDARD_MBC, true , false, false, false}, // 02h MBC1+RAM { GB_MBC1 , GB_STANDARD_MBC, true , true , false, false}, // 03h MBC1+RAM+BATTERY [5] = { GB_MBC2 , GB_STANDARD_MBC, true , false, false, false}, // 05h MBC2 { GB_MBC2 , GB_STANDARD_MBC, true , true , false, false}, // 06h MBC2+BATTERY [8] = { GB_NO_MBC, GB_STANDARD_MBC, true , false, false, false}, // 08h ROM+RAM { GB_NO_MBC, GB_STANDARD_MBC, true , true , false, false}, // 09h ROM+RAM+BATTERY [0xB] = /* Todo: Not supported yet */ { GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 0Bh MMM01 { GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 0Ch MMM01+RAM { GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // 0Dh MMM01+RAM+BATTERY [0xF] = { GB_MBC3 , GB_STANDARD_MBC, false, true, true , false}, // 0Fh MBC3+TIMER+BATTERY { GB_MBC3 , GB_STANDARD_MBC, true , true, true , false}, // 10h MBC3+TIMER+RAM+BATTERY { GB_MBC3 , GB_STANDARD_MBC, false, false, false, false}, // 11h MBC3 { GB_MBC3 , GB_STANDARD_MBC, true , false, false, false}, // 12h MBC3+RAM { GB_MBC3 , GB_STANDARD_MBC, true , true , false, false}, // 13h MBC3+RAM+BATTERY [0x19] = { GB_MBC5 , GB_STANDARD_MBC, false, false, false, false}, // 19h MBC5 { GB_MBC5 , GB_STANDARD_MBC, true , false, false, false}, // 1Ah MBC5+RAM { GB_MBC5 , GB_STANDARD_MBC, true , true , false, false}, // 1Bh MBC5+RAM+BATTERY { GB_MBC5 , GB_STANDARD_MBC, false, false, false, true }, // 1Ch MBC5+RUMBLE { GB_MBC5 , GB_STANDARD_MBC, true , false, false, true }, // 1Dh MBC5+RUMBLE+RAM { GB_MBC5 , GB_STANDARD_MBC, true , true , false, true }, // 1Eh MBC5+RUMBLE+RAM+BATTERY [0x22] = { GB_MBC7 , GB_STANDARD_MBC, true, true, false, false}, // 22h MBC7+ACCEL+EEPROM [0xFC] = { GB_MBC5 , GB_CAMERA , true , true , false, false}, // FCh POCKET CAMERA { GB_NO_MBC, GB_STANDARD_MBC, false, false, false, false}, // FDh BANDAI TAMA5 (Todo: Not supported) { GB_HUC3 , GB_STANDARD_MBC, true , true , true, false}, // FEh HuC3 { GB_HUC1 , GB_STANDARD_MBC, true , true , false, false}, // FFh HuC1+RAM+BATTERY }; void GB_update_mbc_mappings(GB_gameboy_t *gb) { switch (gb->cartridge_type->mbc_type) { case GB_NO_MBC: return; case GB_MBC1: switch (gb->mbc1_wiring) { case GB_STANDARD_MBC1_WIRING: gb->mbc_rom_bank = gb->mbc1.bank_low | (gb->mbc1.bank_high << 5); if (gb->mbc1.mode == 0) { gb->mbc_ram_bank = 0; gb->mbc_rom0_bank = 0; } else { gb->mbc_ram_bank = gb->mbc1.bank_high; gb->mbc_rom0_bank = gb->mbc1.bank_high << 5; } if ((gb->mbc_rom_bank & 0x1F) == 0) { gb->mbc_rom_bank++; } break; case GB_MBC1M_WIRING: gb->mbc_rom_bank = (gb->mbc1.bank_low & 0xF) | (gb->mbc1.bank_high << 4); if (gb->mbc1.mode == 0) { gb->mbc_ram_bank = 0; gb->mbc_rom0_bank = 0; } else { gb->mbc_rom0_bank = gb->mbc1.bank_high << 4; gb->mbc_ram_bank = 0; } if ((gb->mbc1.bank_low & 0x1F) == 0) { gb->mbc_rom_bank++; } break; nodefault; } break; case GB_MBC2: gb->mbc_rom_bank = gb->mbc2.rom_bank; if ((gb->mbc_rom_bank & 0xF) == 0) { gb->mbc_rom_bank = 1; } break; case GB_MBC3: gb->mbc_rom_bank = gb->mbc3.rom_bank; gb->mbc_ram_bank = gb->mbc3.ram_bank; if (!gb->is_mbc30) { gb->mbc_rom_bank &= 0x7F; } if (gb->mbc_rom_bank == 0) { gb->mbc_rom_bank = 1; } break; case GB_MBC5: gb->mbc_rom_bank = gb->mbc5.rom_bank_low | (gb->mbc5.rom_bank_high << 8); gb->mbc_ram_bank = gb->mbc5.ram_bank; break; case GB_MBC7: gb->mbc_rom_bank = gb->mbc7.rom_bank; break; case GB_HUC1: if (gb->huc1.mode == 0) { gb->mbc_rom_bank = gb->huc1.bank_low | (gb->mbc1.bank_high << 6); gb->mbc_ram_bank = 0; } else { gb->mbc_rom_bank = gb->huc1.bank_low; gb->mbc_ram_bank = gb->huc1.bank_high; } break; case GB_HUC3: gb->mbc_rom_bank = gb->huc3.rom_bank; gb->mbc_ram_bank = gb->huc3.ram_bank; break; case GB_TPP1: gb->mbc_rom_bank = gb->tpp1.rom_bank; gb->mbc_ram_bank = gb->tpp1.ram_bank; gb->mbc_ram_enable = (gb->tpp1.mode == 2) || (gb->tpp1.mode == 3); break; nodefault; } } void GB_configure_cart(GB_gameboy_t *gb) { gb->cartridge_type = &GB_cart_defs[gb->rom[0x147]]; if (gb->rom[0x147] == 0xbc && gb->rom[0x149] == 0xc1 && gb->rom[0x14a] == 0x65) { static const GB_cartridge_t tpp1 = {GB_TPP1, GB_STANDARD_MBC, true, true, true, true}; gb->cartridge_type = &tpp1; gb->tpp1.rom_bank = 1; } if (gb->rom[0x147] == 0 && gb->rom_size > 0x8000) { GB_log(gb, "ROM header reports no MBC, but file size is over 32Kb. Assuming cartridge uses MBC3.\n"); gb->cartridge_type = &GB_cart_defs[0x11]; } else if (gb->rom[0x147] != 0 && memcmp(gb->cartridge_type, &GB_cart_defs[0], sizeof(GB_cart_defs[0])) == 0) { GB_log(gb, "Cartridge type %02x is not yet supported.\n", gb->rom[0x147]); } if (gb->mbc_ram) { free(gb->mbc_ram); gb->mbc_ram = NULL; gb->mbc_ram_size = 0; } if (gb->cartridge_type->has_ram) { if (gb->cartridge_type->mbc_type == GB_MBC2) { gb->mbc_ram_size = 0x200; } else if (gb->cartridge_type->mbc_type == GB_MBC7) { gb->mbc_ram_size = 0x100; } else if (gb->cartridge_type->mbc_type == GB_TPP1) { if (gb->rom[0x152] >= 1 && gb->rom[0x152] <= 9) { gb->mbc_ram_size = 0x2000 << (gb->rom[0x152] - 1); } } else { static const unsigned ram_sizes[256] = {0, 0x800, 0x2000, 0x8000, 0x20000, 0x10000}; gb->mbc_ram_size = ram_sizes[gb->rom[0x149]]; } if (gb->mbc_ram_size) { gb->mbc_ram = malloc(gb->mbc_ram_size); } /* Todo: Some games assume unintialized MBC RAM is 0xFF. It this true for all cartridge types? */ memset(gb->mbc_ram, 0xFF, gb->mbc_ram_size); } /* MBC1 has at least 3 types of wiring (We currently support two (Standard and 4bit-MBC1M) of these). See http://forums.nesdev.com/viewtopic.php?f=20&t=14099 */ /* Attempt to "guess" wiring */ if (gb->cartridge_type->mbc_type == GB_MBC1) { if (gb->rom_size >= 0x44000 && memcmp(gb->rom + 0x104, gb->rom + 0x40104, 0x30) == 0) { gb->mbc1_wiring = GB_MBC1M_WIRING; } } /* Detect MBC30 */ if (gb->cartridge_type->mbc_type == GB_MBC3) { if (gb->rom_size > 0x200000 || gb->mbc_ram_size > 0x8000) { gb->is_mbc30 = true; } } /* Set MBC5's bank to 1 correctly */ if (gb->cartridge_type->mbc_type == GB_MBC5) { gb->mbc5.rom_bank_low = 1; } /* Initial MBC7 state */ if (gb->cartridge_type->mbc_type == GB_MBC7) { gb->mbc7.x_latch = gb->mbc7.y_latch = 0x8000; gb->mbc7.latch_ready = true; gb->mbc7.read_bits = -1; gb->mbc7.eeprom_do = true; } }