mirror of https://github.com/bsnes-emu/bsnes.git
108 lines
4.1 KiB
C++
108 lines
4.1 KiB
C++
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struct GameBoyCartridge {
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GameBoyCartridge(uint8_t* data, unsigned size);
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string markup;
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//private:
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struct Information {
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string mapper;
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bool ram;
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bool battery;
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bool rtc;
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bool rumble;
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unsigned romsize;
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unsigned ramsize;
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bool cgb;
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bool cgbonly;
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} info;
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};
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GameBoyCartridge::GameBoyCartridge(uint8_t *romdata, unsigned romsize) {
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if(romsize < 0x4000) return;
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info.mapper = "unknown";
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info.ram = false;
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info.battery = false;
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info.rtc = false;
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info.rumble = false;
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info.romsize = 0;
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info.ramsize = 0;
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unsigned base = romsize - 0x8000;
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if(romdata[base + 0x0104] == 0xce && romdata[base + 0x0105] == 0xed
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&& romdata[base + 0x0106] == 0x66 && romdata[base + 0x0107] == 0x66
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&& romdata[base + 0x0108] == 0xcc && romdata[base + 0x0109] == 0x0d
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&& romdata[base + 0x0147] >= 0x0b && romdata[base + 0x0147] <= 0x0d
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) {
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//MMM01 stores header at bottom of image
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//flip this around for consistency with all other mappers
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uint8_t header[0x8000];
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memcpy(header, romdata + base, 0x8000);
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memmove(romdata + 0x8000, romdata, romsize - 0x8000);
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memcpy(romdata, header, 0x8000);
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}
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info.cgb = (romdata[0x0143] & 0x80) == 0x80;
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info.cgbonly = (romdata[0x0143] & 0xc0) == 0xc0;
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switch(romdata[0x0147]) {
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case 0x00: info.mapper = "none"; break;
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case 0x01: info.mapper = "MBC1"; break;
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case 0x02: info.mapper = "MBC1"; info.ram = true; break;
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case 0x03: info.mapper = "MBC1"; info.ram = true; info.battery = true; break;
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case 0x05: info.mapper = "MBC2"; info.ram = true; break;
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case 0x06: info.mapper = "MBC2"; info.ram = true; info.battery = true; break;
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case 0x08: info.mapper = "none"; info.ram = true; break;
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case 0x09: info.mapper = "MBC0"; info.ram = true; info.battery = true; break;
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case 0x0b: info.mapper = "MMM01"; break;
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case 0x0c: info.mapper = "MMM01"; info.ram = true; break;
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case 0x0d: info.mapper = "MMM01"; info.ram = true; info.battery = true; break;
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case 0x0f: info.mapper = "MBC3"; info.rtc = true; info.battery = true; break;
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case 0x10: info.mapper = "MBC3"; info.rtc = true; info.ram = true; info.battery = true; break;
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case 0x11: info.mapper = "MBC3"; break;
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case 0x12: info.mapper = "MBC3"; info.ram = true; break;
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case 0x13: info.mapper = "MBC3"; info.ram = true; info.battery = true; break;
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case 0x19: info.mapper = "MBC5"; break;
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case 0x1a: info.mapper = "MBC5"; info.ram = true; break;
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case 0x1b: info.mapper = "MBC5"; info.ram = true; info.battery = true; break;
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case 0x1c: info.mapper = "MBC5"; info.rumble = true; break;
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case 0x1d: info.mapper = "MBC5"; info.rumble = true; info.ram = true; break;
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case 0x1e: info.mapper = "MBC5"; info.rumble = true; info.ram = true; info.battery = true; break;
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case 0xfc: break; //Pocket Camera
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case 0xfd: break; //Bandai TAMA5
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case 0xfe: info.mapper = "HuC3"; break;
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case 0xff: info.mapper = "HuC1"; info.ram = true; info.battery = true; break;
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}
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switch(romdata[0x0148]) { default:
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case 0x00: info.romsize = 2 * 16 * 1024; break;
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case 0x01: info.romsize = 4 * 16 * 1024; break;
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case 0x02: info.romsize = 8 * 16 * 1024; break;
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case 0x03: info.romsize = 16 * 16 * 1024; break;
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case 0x04: info.romsize = 32 * 16 * 1024; break;
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case 0x05: info.romsize = 64 * 16 * 1024; break;
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case 0x06: info.romsize = 128 * 16 * 1024; break;
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case 0x07: info.romsize = 256 * 16 * 1024; break;
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case 0x52: info.romsize = 72 * 16 * 1024; break;
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case 0x53: info.romsize = 80 * 16 * 1024; break;
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case 0x54: info.romsize = 96 * 16 * 1024; break;
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}
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switch(romdata[0x0149]) { default:
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case 0x00: info.ramsize = 0 * 1024; break;
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case 0x01: info.ramsize = 2 * 1024; break;
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case 0x02: info.ramsize = 8 * 1024; break;
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case 0x03: info.ramsize = 32 * 1024; break;
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}
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if(info.mapper == "MBC2") info.ramsize = 512; //512 x 4-bit
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markup.append("cartridge\n");
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markup.append(" board type=", info.mapper, "\n");
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markup.append(" rom name=program.rom size=0x", hex(romsize), "\n");
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if(info.ramsize > 0) markup.append(" ram name=save.ram size=0x", hex(info.ramsize), "\n");
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}
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