mirror of https://github.com/bsnes-emu/bsnes.git
835 lines
26 KiB
C++
835 lines
26 KiB
C++
struct SuperFamicomCartridge {
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SuperFamicomCartridge(const uint8_t* data, uint size, bool has_msu1 = false);
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string markup;
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//private:
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auto readHeader(const uint8_t* data, uint size) -> void;
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auto findHeader(const uint8_t* data, uint size) -> uint;
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auto scoreHeader(const uint8_t* data, uint size, uint addr) -> uint;
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enum HeaderField : uint {
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CartName = 0x00,
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Mapper = 0x15,
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RomType = 0x16,
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RomSize = 0x17,
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RamSize = 0x18,
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CartRegion = 0x19,
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Company = 0x1a,
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Version = 0x1b,
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Complement = 0x1c, //inverse checksum
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Checksum = 0x1e,
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ResetVector = 0x3c,
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};
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enum class Type : uint {
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SatellaviewBIOS,
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SufamiTurboBIOS,
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SuperGameBoy1BIOS,
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SuperGameBoy2BIOS,
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LoROM,
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HiROM,
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ExLoROM,
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ExHiROM,
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SuperFX,
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SA1,
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LoROMSatellaview,
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HiROMSatellaview,
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CampusChallenge92,
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Powerfest94,
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//invalid types
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Unknown,
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GameBoy,
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Satellaview,
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SufamiTurbo,
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};
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enum class Region : uint {
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NTSC,
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PAL,
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};
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enum class DSP1Type : uint {
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None,
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LoROM1MB,
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LoROM2MB,
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HiROM,
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};
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bool loaded = false; //is a base cartridge inserted?
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uint crc32 = 0; //crc32 of all cartridges (base+slot(s))
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uint rom_size = 0;
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uint ram_size = 0;
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bool firmware_required = false; //true if firmware is required for emulation
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bool firmware_appended = false; //true if firmware is present at end of data
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Type type = Type::Unknown;
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Region region = Region::NTSC;
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DSP1Type dsp1_type = DSP1Type::None;
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bool has_bsx_slot = false;
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bool has_superfx = false;
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bool has_sa1 = false;
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bool has_sharprtc = false;
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bool has_epsonrtc = false;
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bool has_sdd1 = false;
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bool has_spc7110 = false;
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bool has_cx4 = false;
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bool has_dsp1 = false;
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bool has_dsp2 = false;
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bool has_dsp3 = false;
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bool has_dsp4 = false;
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bool has_obc1 = false;
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bool has_st010 = false;
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bool has_st011 = false;
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bool has_st018 = false;
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};
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SuperFamicomCartridge::SuperFamicomCartridge(const uint8_t* data, uint size, bool has_msu1) {
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//skip copier header
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if((size & 0x7fff) == 512) data += 512, size -= 512;
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if(size < 0x8000) return;
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readHeader(data, size);
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if(type == Type::Unknown) return;
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if(type == Type::GameBoy) return;
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if(type == Type::Satellaview) return;
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if(type == Type::SufamiTurbo) return;
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const char* range = (rom_size > 0x200000) || (ram_size > 32 * 1024) ? "0000-7fff" : "0000-ffff";
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markup.append("board region=", region == Region::NTSC ? "ntsc" : "pal", "\n");
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//detect appended firmware
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if(has_dsp1) {
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firmware_required = true;
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if((size & 0x7fff) == 0x2000) {
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firmware_appended = true;
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rom_size -= 0x2000;
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}
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}
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if(has_dsp2) {
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firmware_required = true;
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if((size & 0x7fff) == 0x2000) {
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firmware_appended = true;
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rom_size -= 0x2000;
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}
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}
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if(has_dsp3) {
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firmware_required = true;
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if((size & 0x7fff) == 0x2000) {
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firmware_appended = true;
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rom_size -= 0x2000;
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}
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}
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if(has_dsp4) {
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firmware_required = true;
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if((size & 0x7fff) == 0x2000) {
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firmware_appended = true;
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rom_size -= 0x2000;
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}
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}
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if(has_st010) {
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firmware_required = true;
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if((size & 0xffff) == 0xd000) {
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firmware_appended = true;
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rom_size -= 0xd000;
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}
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}
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if(has_st011) {
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firmware_required = true;
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if((size & 0xffff) == 0xd000) {
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firmware_appended = true;
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rom_size -= 0xd000;
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}
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}
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if(has_st018) {
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firmware_required = true;
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if((size & 0x3ffff) == 0x28000) {
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firmware_appended = true;
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rom_size -= 0x28000;
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}
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}
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if(has_cx4) {
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firmware_required = true;
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if((rom_size & 0x7fff) == 0xc00) {
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firmware_appended = true;
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rom_size -= 0xc00;
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}
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}
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if(type == Type::SuperGameBoy1BIOS || type == Type::SuperGameBoy2BIOS) {
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firmware_required = true;
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if((rom_size & 0x7fff) == 0x100) {
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firmware_appended = true;
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rom_size -= 0x100;
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}
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}
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//end firmware detection
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if(type == Type::SatellaviewBIOS) {
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markup.append(
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=10-1f:5000-5fff mask=0xf000\n"
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" mcc\n"
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" map address=00-0f:5000\n"
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" map=mcu address=00-3f,80-bf:8000-ffff mask=0x408000\n"
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" map=mcu address=40-7d,c0-ff:0000-ffff\n"
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" ram name=download.ram size=0x80000\n"
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" map address=00-3f,80-bf:6000-7fff mask=0xe000\n"
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" bsmemory\n"
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);
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}
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else if(type == Type::SufamiTurboBIOS) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-1f,80-9f:8000-ffff mask=0x8000\n"
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" sufamiturbo\n"
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" rom\n"
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" map address=20-3f,a0-bf:8000-ffff mask=0x8000\n"
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" ram\n"
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" map address=60-6f,e0-ef:0000-ffff\n"
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" sufamiturbo\n"
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" rom\n"
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" map address=40-5f,c0-df:0000-7fff mask=0x8000\n"
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" map address=40-5f,c0-df:8000-ffff mask=0x8000\n"
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" ram\n"
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" map address=70-7d,f0-ff:0000-ffff\n"
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);
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}
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else if(type == Type::SuperGameBoy1BIOS || type == Type::SuperGameBoy2BIOS) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-7d,80-ff:8000-ffff mask=0x8000\n"
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" map address=40-7d,c0-ff:0000-7fff mask=0x8000\n"
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" icd2 revision=1\n"
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" map address=00-3f,80-bf:6000-67ff,7000-7fff\n"
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" rom name=sgb.boot.rom size=0x100\n"
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);
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}
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else if(has_cx4) {
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markup.append(
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" hitachidsp model=HG51B169 frequency=20000000\n"
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" map address=00-3f,80-bf:6c00-6fff,7c00-7fff\n"
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-3f,80-bf:8000-ffff mask=0x8000\n"
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" ram name=save.ram size=0\n"
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" map address=70-77:0000-7fff mask=0x8000\n"
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" drom name=cx4.data.rom size=0xc00\n"
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" dram name=cx4.data.ram size=0xc00 volatile\n"
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" map address=00-3f,80-bf:6000-6bff,7000-7bff mask=0xf000\n"
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);
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}
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else if(has_spc7110) {
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markup.append(
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" spc7110\n"
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" map address=00-3f,80-bf:4800-483f\n"
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" map address=50,58:0000-ffff\n"
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" map=mcu address=00-3f,80-bf:8000-ffff mask=0x800000\n"
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" map=mcu address=c0-ff:0000-ffff mask=0xc00000\n"
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" prom name=program.rom size=0x100000\n"
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" drom name=data.rom size=0x", hex(rom_size - 0x100000), "\n"
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=00-3f,80-bf:6000-7fff mask=0xe000\n"
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);
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}
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else if(has_sdd1) {
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markup.append(
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" sdd1\n"
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" map address=00-3f,80-bf:4800-4807\n"
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-3f,80-bf:8000-ffff mask=0x808000\n"
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" map address=c0-ff:0000-ffff\n"
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);
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if(ram_size > 0) markup.append(
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=20-3f,a0-bf:6000-7fff mask=0xe000\n"
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" map address=70-7d:0000-7fff mask=0x8000\n"
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);
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}
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else if(type == Type::LoROM) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-7d,80-ff:8000-ffff mask=0x8000\n"
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" map address=40-6f,c0-ef:0000-7fff mask=0x8000\n"
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);
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if(ram_size > 0) markup.append(
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=70-7d,f0-ff:", range, "\n"
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);
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}
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else if(type == Type::HiROM) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-3f,80-bf:8000-ffff\n"
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" map address=40-7f,c0-ff:0000-ffff\n"
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);
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if(ram_size > 0) markup.append(
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=10-3f,90-bf:6000-7fff mask=0xe000\n"
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);
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}
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else if(type == Type::ExLoROM) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-3f,80-bf:8000-ffff mask=0x8000\n"
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" map address=40-7d:0000-ffff\n"
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);
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if(ram_size > 0) markup.append(
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=20-3f,a0-bf:6000-7fff mask=0xe000\n"
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" map address=70-7d:0000-7fff mask=0x8000\n"
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);
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}
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else if(type == Type::ExHiROM) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-3f:8000-ffff base=0x400000\n"
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" map address=40-7d:0000-ffff base=0x400000\n"
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" map address=80-bf:8000-ffff mask=0xc00000\n"
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" map address=c0-ff:0000-ffff mask=0xc00000\n"
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);
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if(ram_size > 0) markup.append(
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=20-3f,a0-bf:6000-7fff mask=0xe000\n"
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" map address=70-7d:", range, "\n"
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);
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}
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else if(type == Type::SuperFX) {
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markup.append(
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" superfx\n"
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" map address=00-3f,80-bf:3000-34ff\n"
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-3f,80-bf:8000-ffff mask=0x8000\n"
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" map address=40-5f,c0-df:0000-ffff\n"
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);
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if(ram_size > 0) markup.append(
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=00-3f,80-bf:6000-7fff size=0x2000\n"
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" map address=70-71,f0-f1:0000-ffff\n"
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);
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}
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else if(type == Type::SA1) {
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markup.append(
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" sa1\n"
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" map address=00-3f,80-bf:2200-23ff\n"
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-3f,80-bf:8000-ffff mask=0x408000\n"
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" map address=c0-ff:0000-ffff\n"
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);
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if(ram_size > 0) markup.append(
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" bwram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=00-3f,80-bf:6000-7fff size=0x2000\n"
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" map address=40-4f:0000-ffff\n"
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);
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markup.append(
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" iram id=internal size=0x800 volatile\n"
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" map address=00-3f,80-bf:3000-37ff size=0x800\n"
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);
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}
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else if(type == Type::LoROMSatellaview) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-1f:8000-ffff base=0x000000 mask=0x8000\n"
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" map address=20-3f:8000-ffff base=0x100000 mask=0x8000\n"
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" map address=80-9f:8000-ffff base=0x200000 mask=0x8000\n"
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" map address=a0-bf:8000-ffff base=0x100000 mask=0x8000\n"
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=70-7d,f0-ff:0000-7fff mask=0x8000\n"
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" bsmemory\n"
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" map address=c0-ef:0000-ffff\n"
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);
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}
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else if(type == Type::HiROMSatellaview) {
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markup.append(
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" rom name=program.rom size=0x", hex(rom_size), "\n"
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" map address=00-1f,80-9f:8000-ffff\n"
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" map address=40-5f,c0-df:0000-ffff\n"
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" ram name=save.ram size=0x", hex(ram_size), "\n"
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" map address=20-3f,a0-bf:6000-7fff\n"
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" bsmemory\n"
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" map address=20-3f,a0-bf:8000-ffff\n"
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" map address=60-7f,e0-ff:0000-ffff\n"
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);
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}
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else if(type == Type::CampusChallenge92) {
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markup.append(
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" event=CC92 timer=360\n"
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" map address=c0,e0:0000\n"
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" map=mcu address=00-1f,80-9f:8000-ffff\n"
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" rom name=program.rom size=0x40000\n"
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" rom name=slot-1.rom size=0x80000\n"
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" rom name=slot-2.rom size=0x80000\n"
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" rom name=slot-3.rom size=0x80000\n"
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" ram name=save.ram size=0x2000 volatile\n"
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" map address=70-7d,f0-ff:0000-7fff mask=0x8000\n"
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" necdsp model=uPD7725 frequency=8000000\n"
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" map address=20-3f,a0-bf:8000-ffff mask=0x7fff\n"
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" prom name=dsp1.program.rom size=0x1800\n"
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" drom name=dsp1.data.rom size=0x800\n"
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" dram name=dsp1.data.ram size=0x200 volatile\n"
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);
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return;
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}
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else if(type == Type::Powerfest94) {
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markup.append(
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" event=PF94 timer=360\n"
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" map address=10,20:6000\n"
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" map=mcu address=00-3f,80-bf:8000-ffff\n"
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" map=mcu address=c0-ff:0000-ffff\n"
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" rom name=program.rom size=0x40000\n"
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" rom name=slot-1.rom size=0x80000\n"
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" rom name=slot-2.rom size=0x80000\n"
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" rom name=slot-3.rom size=0x100000\n"
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" ram name=save.ram size=0x2000 volatile\n"
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" map address=30-3f,b0-bf:6000-7fff mask=0xe000\n"
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" necdsp model=uPD7725 frequency=8000000\n"
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" map address=00-0f,80-8f:6000-7fff mask=0xfff\n"
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" prom name=dsp1.program.rom size=0x1800\n"
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" drom name=dsp1.data.rom size=0x800\n"
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" dram name=dsp1.data.ram size=0x200 volatile\n"
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);
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return;
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}
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if(has_sharprtc) {
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markup.append(
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" sharprtc\n"
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" map address=00-3f,80-bf:2800-2801\n"
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" ram name=rtc.ram size=0x10\n"
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);
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}
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if(has_epsonrtc) {
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markup.append(
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" epsonrtc\n"
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" map address=00-3f,80-bf:4840-4842\n"
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" ram name=rtc.ram size=0x10\n"
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);
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}
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if(has_obc1) {
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markup.append(
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" obc1\n"
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" map address=00-3f,80-bf:6000-7fff mask=0xe000\n"
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" ram name=save.ram size=0x2000\n"
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);
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}
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if(has_dsp1) {
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markup.append(
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" necdsp model=uPD7725 frequency=8000000\n"
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|
);
|
|
if(dsp1_type == DSP1Type::LoROM1MB) markup.append(
|
|
" map address=20-3f,a0-bf:8000-ffff mask=0x3fff\n"
|
|
);
|
|
if(dsp1_type == DSP1Type::LoROM2MB) markup.append(
|
|
" map address=60-6f,e0-ef:0000-7fff mask=0x3fff\n"
|
|
);
|
|
if(dsp1_type == DSP1Type::HiROM) markup.append(
|
|
" map address=00-1f,80-9f:6000-7fff mask=0xfff\n"
|
|
);
|
|
markup.append(
|
|
" prom name=dsp1b.program.rom size=0x1800\n"
|
|
" drom name=dsp1b.data.rom size=0x800\n"
|
|
" dram name=dsp1b.data.ram size=0x200 volatile\n"
|
|
);
|
|
}
|
|
|
|
if(has_dsp2) {
|
|
markup.append(
|
|
" necdsp model=uPD7725 frequency=8000000\n"
|
|
" map address=20-3f,a0-bf:8000-ffff mask=0x3fff\n"
|
|
" prom name=dsp2.program.rom size=0x1800\n"
|
|
" drom name=dsp2.data.rom size=0x800\n"
|
|
" dram name=dsp2.data.ram size=0x200 volatile\n"
|
|
);
|
|
}
|
|
|
|
if(has_dsp3) {
|
|
markup.append(
|
|
" necdsp model=uPD7725 frequency=8000000\n"
|
|
" map address=20-3f,a0-bf:8000-ffff mask=0x3fff\n"
|
|
" prom name=dsp3.program.rom size=0x1800\n"
|
|
" drom name=dsp3.data.rom size=0x800\n"
|
|
" dram name=dsp3.data.ram size=0x200 volatile\n"
|
|
);
|
|
}
|
|
|
|
if(has_dsp4) {
|
|
markup.append(
|
|
" necdsp model=uPD7725 frequency=8000000\n"
|
|
" map address=30-3f,b0-bf:8000-ffff mask=0x3fff\n"
|
|
" prom name=dsp4.program.rom size=0x1800\n"
|
|
" drom name=dsp4.data.rom size=0x800\n"
|
|
" dram name=dsp4.data.ram size=0x200 volatile\n"
|
|
);
|
|
}
|
|
|
|
if(has_st010) {
|
|
markup.append(
|
|
" necdsp model=uPD96050 frequency=11000000\n"
|
|
" map address=60-67,e0-e7:0000-3fff\n"
|
|
" prom name=st010.program.rom size=0xc000\n"
|
|
" drom name=st010.data.rom size=0x1000\n"
|
|
" dram name=save.ram size=0x1000\n"
|
|
" map address=68-6f,e8-ef:0000-7fff mask=0x8000\n"
|
|
);
|
|
}
|
|
|
|
if(has_st011) {
|
|
markup.append(
|
|
" necdsp model=uPD96050 frequency=15000000\n"
|
|
" map address=60-67,e0-e7:0000-3fff\n"
|
|
" prom name=st011.program.rom size=0xc000\n"
|
|
" drom name=st011.data.rom size=0x1000\n"
|
|
" dram name=save.ram size=0x1000\n"
|
|
" map address=68-6f,e8-ef:0000-7fff mask=0x8000\n"
|
|
);
|
|
}
|
|
|
|
if(has_st018) {
|
|
markup.append(
|
|
" armdsp frequency=21477272\n"
|
|
" map address=00-3f,80-bf:3800-38ff\n"
|
|
" prom name=st018.program.rom size=0x20000\n"
|
|
" drom name=st018.data.rom size=0x8000\n"
|
|
" dram name=save.ram size=0x4000\n"
|
|
);
|
|
}
|
|
|
|
if(has_msu1) {
|
|
markup.append(
|
|
" msu1\n"
|
|
" map address=00-3f,80-bf:2000-2007\n"
|
|
" rom name=msu1.rom\n"
|
|
);
|
|
}
|
|
}
|
|
|
|
auto SuperFamicomCartridge::readHeader(const uint8_t* data, uint size) -> void {
|
|
//detect Game Boy carts
|
|
if(size >= 0x0140) {
|
|
if(data[0x0104] == 0xce && data[0x0105] == 0xed && data[0x0106] == 0x66 && data[0x0107] == 0x66
|
|
&& data[0x0108] == 0xcc && data[0x0109] == 0x0d && data[0x010a] == 0x00 && data[0x010b] == 0x0b) {
|
|
type = Type::GameBoy;
|
|
return;
|
|
}
|
|
}
|
|
|
|
const uint index = findHeader(data, size);
|
|
const uint8_t mapperid = data[index + Mapper];
|
|
const uint8_t rom_type = data[index + RomType];
|
|
const uint8_t rom_size = data[index + RomSize];
|
|
const uint8_t company = data[index + Company];
|
|
const uint8_t regionid = data[index + CartRegion] & 0x7f;
|
|
|
|
const uint16_t complement = data[index + Complement] | data[index + Complement + 1] << 8;
|
|
const uint16_t checksum = data[index + Checksum] | data[index + Checksum + 1] << 8;
|
|
|
|
this->rom_size = size;
|
|
ram_size = 1024 << (data[index + RamSize] & 7);
|
|
if(ram_size == 1024) ram_size = 0; //no RAM present
|
|
if(rom_size == 0 && ram_size) ram_size = 0; //fix for Bazooka Blitzkrieg's malformed header (swapped ROM and RAM sizes)
|
|
|
|
//0, 1, 13 = NTSC; 2 - 12 = PAL
|
|
region = (regionid <= 1 || regionid >= 13) ? Region::NTSC : Region::PAL;
|
|
|
|
//detect BS-X flash carts
|
|
if(data[index + 0x13] == 0x00 || data[index + 0x13] == 0xff) {
|
|
if(data[index + 0x14] == 0x00) {
|
|
const uint8_t n15 = data[index + 0x15];
|
|
if(n15 == 0x00 || n15 == 0x80 || n15 == 0x84 || n15 == 0x9c || n15 == 0xbc || n15 == 0xfc) {
|
|
if(data[index + 0x1a] == 0x33 || data[index + 0x1a] == 0xff) {
|
|
type = Type::Satellaview;
|
|
region = Region::NTSC; //BS-X only released in Japan
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//detect Sufami Turbo carts
|
|
if(!memcmp(data, "BANDAI SFC-ADX", 14)) {
|
|
if(!memcmp(data + 16, "SFC-ADX BACKUP", 14)) {
|
|
type = Type::SufamiTurboBIOS;
|
|
} else {
|
|
type = Type::SufamiTurbo;
|
|
}
|
|
region = Region::NTSC; //Sufami Turbo only released in Japan
|
|
return; //RAM size handled outside this routine
|
|
}
|
|
|
|
//detect Super Game Boy BIOS
|
|
if(!memcmp(data + index, "Super GAMEBOY2", 14)) {
|
|
type = Type::SuperGameBoy2BIOS;
|
|
return;
|
|
}
|
|
|
|
if(!memcmp(data + index, "Super GAMEBOY", 13)) {
|
|
type = Type::SuperGameBoy1BIOS;
|
|
return;
|
|
}
|
|
|
|
//detect competition carts
|
|
if(!memcmp(data + index, "\x00\x08\x22\x02\x1c\x00\x10\x00\x08\x65\x80\x84\x20\x00\x22\x25\x00\x83\x0c\x80\x10", 21)
|
|
&& complement == 0x0100 && checksum == 0x2d02 && (size == 0x1c0000 || size == 0x1c2000)) {
|
|
type = Type::CampusChallenge92; //dark title screen version
|
|
return;
|
|
}
|
|
|
|
if(!memcmp(data + index, "\xc9\x80\x80\x44\x15\x00\x62\x09\x29\xa0\x52\x70\x50\x12\x05\x35\x31\x63\xc0\x22\x01", 21)
|
|
&& complement == 0x2011 && checksum == 0xf8c0 && (size == 0x240000 || size == 0x242000)) {
|
|
type = Type::Powerfest94; //10,000 points version
|
|
return;
|
|
}
|
|
|
|
if(!memcmp(data + index, "PREHISTORIK MAN ", 21)
|
|
&& complement == 0xffff && checksum == 0x0000 && (size == 0x240000 || size == 0x242000)) {
|
|
type = Type::Powerfest94; //1,000,000 points version
|
|
return;
|
|
}
|
|
|
|
//detect presence of BS-X flash cartridge connector (reads extended header information)
|
|
if(data[index - 14] == 'Z') {
|
|
if(data[index - 11] == 'J') {
|
|
uint8_t n13 = data[index - 13];
|
|
if((n13 >= 'A' && n13 <= 'Z') || (n13 >= '0' && n13 <= '9')) {
|
|
if(company == 0x33 || (data[index - 10] == 0x00 && data[index - 4] == 0x00)) {
|
|
has_bsx_slot = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if(has_bsx_slot) {
|
|
if(!memcmp(data + index, "Satellaview BS-X ", 21)) {
|
|
//BS-X base cart
|
|
type = Type::SatellaviewBIOS;
|
|
region = Region::NTSC; //BS-X only released in Japan
|
|
return; //RAM size handled internally by load_cart_bsx() -> BSXCart class
|
|
} else {
|
|
type = (index == 0x7fc0 ? Type::LoROMSatellaview : Type::HiROMSatellaview);
|
|
region = Region::NTSC; //BS-X slotted cartridges only released in Japan
|
|
}
|
|
} else {
|
|
//standard cart
|
|
if(index == 0x7fc0 && size >= 0x401000) {
|
|
type = Type::ExLoROM;
|
|
} else if(index == 0x7fc0 && mapperid == 0x32) {
|
|
type = Type::ExLoROM;
|
|
} else if(index == 0x7fc0) {
|
|
type = Type::LoROM;
|
|
} else if(index == 0xffc0) {
|
|
type = Type::HiROM;
|
|
} else if(index == 0x40ffc0) {
|
|
type = Type::ExHiROM;
|
|
} else {
|
|
type = Type::Unknown;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if(mapperid == 0x20 && (rom_type == 0x13 || rom_type == 0x14 || rom_type == 0x15 || rom_type == 0x1a)) {
|
|
has_superfx = true;
|
|
type = Type::SuperFX;
|
|
ram_size = 1024 << (data[index - 3] & 7);
|
|
if(ram_size == 1024) ram_size = 0;
|
|
}
|
|
|
|
if(mapperid == 0x23 && (rom_type == 0x32 || rom_type == 0x34 || rom_type == 0x35)) {
|
|
has_sa1 = true;
|
|
type = Type::SA1;
|
|
}
|
|
|
|
if(mapperid == 0x35 && rom_type == 0x55) {
|
|
has_sharprtc = true;
|
|
}
|
|
|
|
if(mapperid == 0x32 && (rom_type == 0x43 || rom_type == 0x45)) {
|
|
has_sdd1 = true;
|
|
}
|
|
|
|
if(mapperid == 0x3a && (rom_type == 0xf5 || rom_type == 0xf9)) {
|
|
has_spc7110 = true;
|
|
has_epsonrtc = (rom_type == 0xf9);
|
|
}
|
|
|
|
if(mapperid == 0x20 && rom_type == 0xf3) {
|
|
has_cx4 = true;
|
|
}
|
|
|
|
if((mapperid == 0x20 || mapperid == 0x21) && rom_type == 0x03) {
|
|
has_dsp1 = true;
|
|
}
|
|
|
|
if(mapperid == 0x30 && rom_type == 0x05 && company != 0xb2) {
|
|
has_dsp1 = true;
|
|
}
|
|
|
|
if(mapperid == 0x31 && (rom_type == 0x03 || rom_type == 0x05)) {
|
|
has_dsp1 = true;
|
|
}
|
|
|
|
if(has_dsp1 == true) {
|
|
if((mapperid & 0x2f) == 0x20 && size <= 0x100000) {
|
|
dsp1_type = DSP1Type::LoROM1MB;
|
|
} else if((mapperid & 0x2f) == 0x20) {
|
|
dsp1_type = DSP1Type::LoROM2MB;
|
|
} else if((mapperid & 0x2f) == 0x21) {
|
|
dsp1_type = DSP1Type::HiROM;
|
|
}
|
|
}
|
|
|
|
if(mapperid == 0x20 && rom_type == 0x05) {
|
|
has_dsp2 = true;
|
|
}
|
|
|
|
if(mapperid == 0x30 && rom_type == 0x05 && company == 0xb2) {
|
|
has_dsp3 = true;
|
|
}
|
|
|
|
if(mapperid == 0x30 && rom_type == 0x03) {
|
|
has_dsp4 = true;
|
|
}
|
|
|
|
if(mapperid == 0x30 && rom_type == 0x25) {
|
|
has_obc1 = true;
|
|
}
|
|
|
|
if(mapperid == 0x30 && rom_type == 0xf6 && rom_size >= 10) {
|
|
has_st010 = true;
|
|
}
|
|
|
|
if(mapperid == 0x30 && rom_type == 0xf6 && rom_size < 10) {
|
|
has_st011 = true;
|
|
}
|
|
|
|
if(mapperid == 0x30 && rom_type == 0xf5) {
|
|
has_st018 = true;
|
|
}
|
|
}
|
|
|
|
auto SuperFamicomCartridge::findHeader(const uint8_t* data, uint size) -> uint {
|
|
uint score_lo = scoreHeader(data, size, 0x007fc0);
|
|
uint score_hi = scoreHeader(data, size, 0x00ffc0);
|
|
uint score_ex = scoreHeader(data, size, 0x40ffc0);
|
|
if(score_ex) score_ex += 4; //favor ExHiROM on images > 32mbits
|
|
|
|
if(score_lo >= score_hi && score_lo >= score_ex) {
|
|
return 0x007fc0;
|
|
} else if(score_hi >= score_ex) {
|
|
return 0x00ffc0;
|
|
} else {
|
|
return 0x40ffc0;
|
|
}
|
|
}
|
|
|
|
auto SuperFamicomCartridge::scoreHeader(const uint8_t* data, uint size, uint addr) -> uint {
|
|
if(size < addr + 64) return 0; //image too small to contain header at this location?
|
|
int score = 0;
|
|
|
|
uint16_t resetvector = data[addr + ResetVector] | (data[addr + ResetVector + 1] << 8);
|
|
uint16_t checksum = data[addr + Checksum ] | (data[addr + Checksum + 1] << 8);
|
|
uint16_t complement = data[addr + Complement ] | (data[addr + Complement + 1] << 8);
|
|
|
|
uint8_t resetop = data[(addr & ~0x7fff) | (resetvector & 0x7fff)]; //first opcode executed upon reset
|
|
uint8_t mapper = data[addr + Mapper] & ~0x10; //mask off irrelevent FastROM-capable bit
|
|
|
|
//$00:[000-7fff] contains uninitialized RAM and MMIO.
|
|
//reset vector must point to ROM at $00:[8000-ffff] to be considered valid.
|
|
if(resetvector < 0x8000) return 0;
|
|
|
|
//some images duplicate the header in multiple locations, and others have completely
|
|
//invalid header information that cannot be relied upon.
|
|
//below code will analyze the first opcode executed at the specified reset vector to
|
|
//determine the probability that this is the correct header.
|
|
|
|
//most likely opcodes
|
|
if(resetop == 0x78 //sei
|
|
|| resetop == 0x18 //clc (clc; xce)
|
|
|| resetop == 0x38 //sec (sec; xce)
|
|
|| resetop == 0x9c //stz $nnnn (stz $4200)
|
|
|| resetop == 0x4c //jmp $nnnn
|
|
|| resetop == 0x5c //jml $nnnnnn
|
|
) score += 8;
|
|
|
|
//plausible opcodes
|
|
if(resetop == 0xc2 //rep #$nn
|
|
|| resetop == 0xe2 //sep #$nn
|
|
|| resetop == 0xad //lda $nnnn
|
|
|| resetop == 0xae //ldx $nnnn
|
|
|| resetop == 0xac //ldy $nnnn
|
|
|| resetop == 0xaf //lda $nnnnnn
|
|
|| resetop == 0xa9 //lda #$nn
|
|
|| resetop == 0xa2 //ldx #$nn
|
|
|| resetop == 0xa0 //ldy #$nn
|
|
|| resetop == 0x20 //jsr $nnnn
|
|
|| resetop == 0x22 //jsl $nnnnnn
|
|
) score += 4;
|
|
|
|
//implausible opcodes
|
|
if(resetop == 0x40 //rti
|
|
|| resetop == 0x60 //rts
|
|
|| resetop == 0x6b //rtl
|
|
|| resetop == 0xcd //cmp $nnnn
|
|
|| resetop == 0xec //cpx $nnnn
|
|
|| resetop == 0xcc //cpy $nnnn
|
|
) score -= 4;
|
|
|
|
//least likely opcodes
|
|
if(resetop == 0x00 //brk #$nn
|
|
|| resetop == 0x02 //cop #$nn
|
|
|| resetop == 0xdb //stp
|
|
|| resetop == 0x42 //wdm
|
|
|| resetop == 0xff //sbc $nnnnnn,x
|
|
) score -= 8;
|
|
|
|
//at times, both the header and reset vector's first opcode will match ...
|
|
//fallback and rely on info validity in these cases to determine more likely header.
|
|
|
|
//a valid checksum is the biggest indicator of a valid header.
|
|
if((checksum + complement) == 0xffff && (checksum != 0) && (complement != 0)) score += 4;
|
|
|
|
if(addr == 0x007fc0 && mapper == 0x20) score += 2; //0x20 is usually LoROM
|
|
if(addr == 0x00ffc0 && mapper == 0x21) score += 2; //0x21 is usually HiROM
|
|
if(addr == 0x007fc0 && mapper == 0x22) score += 2; //0x22 is usually ExLoROM
|
|
if(addr == 0x40ffc0 && mapper == 0x25) score += 2; //0x25 is usually ExHiROM
|
|
|
|
if(data[addr + Company] == 0x33) score += 2; //0x33 indicates extended header
|
|
if(data[addr + RomType] < 0x08) score++;
|
|
if(data[addr + RomSize] < 0x10) score++;
|
|
if(data[addr + RamSize] < 0x08) score++;
|
|
if(data[addr + CartRegion] < 14) score++;
|
|
|
|
if(score < 0) score = 0;
|
|
return score;
|
|
}
|