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bsnes/nall/snes/info.hpp
byuu 81f43a4d01 Update to snes-20100807 release. 
This represents a major code restructuring. The dot-based and
scanline-based renderers are now split into two separate core
libraries, asnes and bsnes.

For now at least, these are -internal- names. I'm not entirely decided
on how I'm going to handle releasing these two separate builds.
Regardless, the folders need names.

asnes has had all of the processor subfolders collapsed back into
their parent folders. In other words, ppu's functions were moved into
ppu/sppu, and then ppu was deleted, and then ppu/sppu became the new
ppu. Repeat this for the cpu, smp and dsp and there you go.

asnes/dsp also removed the DSP_STATE_MACHINE option. This was done for
the sake of consistency with the rest of the core.

asnes' debugger mode is currently extremely broken, but I will be
fixing it in time.

And for now, bsnes has kept the processor abstraction layer. I may
keep it around, not sure yet. It doesn't hurt speed or anything, so
I'm not too worried about making a decision right away.

I may throw snesfilter, snesreader and supergameboy into this folder,
just to have everything in one place. The alternate GUI forks are
definitely going in there as dotnet, cocoa and python.

Compiled output goes to the out/ folder now, to prevent conflicts with
a file and folder named bsnes, for instance.
2010-08-07 15:07:24 +00:00

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#ifndef NALL_SNES_INFO_HPP
#define NALL_SNES_INFO_HPP
namespace nall {
class snes_information {
public:
string xml_memory_map;
inline snes_information(const uint8_t *data, unsigned size);
private:
inline void read_header(const uint8_t *data, unsigned size);
inline unsigned find_header(const uint8_t *data, unsigned size);
inline unsigned score_header(const uint8_t *data, unsigned size, unsigned addr);
inline unsigned gameboy_ram_size(const uint8_t *data, unsigned size);
inline bool gameboy_has_rtc(const uint8_t *data, unsigned size);
enum HeaderField {
CartName = 0x00,
Mapper = 0x15,
RomType = 0x16,
RomSize = 0x17,
RamSize = 0x18,
CartRegion = 0x19,
Company = 0x1a,
Version = 0x1b,
Complement = 0x1c, //inverse checksum
Checksum = 0x1e,
ResetVector = 0x3c,
};
enum Mode {
ModeNormal,
ModeBsxSlotted,
ModeBsx,
ModeSufamiTurbo,
ModeSuperGameBoy,
};
enum Type {
TypeNormal,
TypeBsxSlotted,
TypeBsxBios,
TypeBsx,
TypeSufamiTurboBios,
TypeSufamiTurbo,
TypeSuperGameBoy1Bios,
TypeSuperGameBoy2Bios,
TypeGameBoy,
TypeUnknown,
};
enum Region {
NTSC,
PAL,
};
enum MemoryMapper {
LoROM,
HiROM,
ExLoROM,
ExHiROM,
SuperFXROM,
SA1ROM,
SPC7110ROM,
BSCLoROM,
BSCHiROM,
BSXROM,
STROM,
};
enum DSP1MemoryMapper {
DSP1Unmapped,
DSP1LoROM1MB,
DSP1LoROM2MB,
DSP1HiROM,
};
bool loaded; //is a base cartridge inserted?
unsigned crc32; //crc32 of all cartridges (base+slot(s))
unsigned rom_size;
unsigned ram_size;
Mode mode;
Type type;
Region region;
MemoryMapper mapper;
DSP1MemoryMapper dsp1_mapper;
bool has_bsx_slot;
bool has_superfx;
bool has_sa1;
bool has_srtc;
bool has_sdd1;
bool has_spc7110;
bool has_spc7110rtc;
bool has_cx4;
bool has_dsp1;
bool has_dsp2;
bool has_dsp3;
bool has_dsp4;
bool has_obc1;
bool has_st010;
bool has_st011;
bool has_st018;
};
snes_information::snes_information(const uint8_t *data, unsigned size) {
read_header(data, size);
string xml = "<?xml version='1.0' encoding='UTF-8'?>\n";
if(type == TypeBsx) {
xml << "<cartridge/>";
xml_memory_map = xml;
return;
}
if(type == TypeSufamiTurbo) {
xml << "<cartridge/>";
xml_memory_map = xml;
return;
}
if(type == TypeGameBoy) {
xml << "<cartridge rtc='" << gameboy_has_rtc(data, size) << "'>\n";
if(gameboy_ram_size(data, size) > 0) {
xml << " <ram size='" << strhex(gameboy_ram_size(data, size)) << "'/>\n";
}
xml << "</cartridge>\n";
xml_memory_map = xml;
return;
}
xml << "<cartridge";
if(region == NTSC) {
xml << " region='NTSC'";
} else {
xml << " region='PAL'";
}
xml << ">\n";
if(type == TypeSuperGameBoy1Bios) {
xml << " <rom>\n";
xml << " <map mode='linear' address='00-7f:8000-ffff'/>\n";
xml << " <map mode='linear' address='80-ff:8000-ffff'/>\n";
xml << " </rom>\n";
xml << " <supergameboy revision='1'>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:6000-7fff'/>\n";
xml << " <map address='80-bf:6000-7fff'/>\n";
xml << " </mmio>\n";
xml << " </supergameboy>\n";
} else if(type == TypeSuperGameBoy2Bios) {
xml << " <rom>\n";
xml << " <map mode='linear' address='00-7f:8000-ffff'/>\n";
xml << " <map mode='linear' address='80-ff:8000-ffff'/>\n";
xml << " </rom>\n";
xml << " <supergameboy revision='2'>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:6000-7fff'/>\n";
xml << " <map address='80-bf:6000-7fff'/>\n";
xml << " </mmio>\n";
xml << " </supergameboy>\n";
} else if(has_spc7110) {
xml << " <rom>\n";
xml << " <map mode='shadow' address='00-0f:8000-ffff'/>\n";
xml << " <map mode='shadow' address='80-bf:8000-ffff'/>\n";
xml << " <map mode='linear' address='c0-cf:0000-ffff'/>\n";
xml << " </rom>\n";
xml << " <spc7110>\n";
xml << " <mcu>\n";
xml << " <map address='d0-ff:0000-ffff' offset='100000' size='" << strhex(size - 0x100000) << "'/>\n";
xml << " </mcu>\n";
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='00:6000-7fff'/>\n";
xml << " <map mode='linear' address='30:6000-7fff'/>\n";
xml << " </ram>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:4800-483f'/>\n";
xml << " <map address='80-bf:4800-483f'/>\n";
xml << " </mmio>\n";
if(has_spc7110rtc) {
xml << " <rtc>\n";
xml << " <map address='00-3f:4840-4842'/>\n";
xml << " <map address='80-bf:4840-4842'/>\n";
xml << " </rtc>\n";
}
xml << " <dcu>\n";
xml << " <map address='50:0000-ffff'/>\n";
xml << " </dcu>\n";
xml << " </spc7110>\n";
} else if(mapper == LoROM) {
xml << " <rom>\n";
xml << " <map mode='linear' address='00-7f:8000-ffff'/>\n";
xml << " <map mode='linear' address='80-ff:8000-ffff'/>\n";
xml << " </rom>\n";
if(ram_size > 0) {
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='20-3f:6000-7fff'/>\n";
xml << " <map mode='linear' address='a0-bf:6000-7fff'/>\n";
if((rom_size > 0x200000) || (ram_size > 32 * 1024)) {
xml << " <map mode='linear' address='70-7f:0000-7fff'/>\n";
xml << " <map mode='linear' address='f0-ff:0000-7fff'/>\n";
} else {
xml << " <map mode='linear' address='70-7f:0000-ffff'/>\n";
xml << " <map mode='linear' address='f0-ff:0000-ffff'/>\n";
}
xml << " </ram>\n";
}
} else if(mapper == HiROM) {
xml << " <rom>\n";
xml << " <map mode='shadow' address='00-3f:8000-ffff'/>\n";
xml << " <map mode='linear' address='40-7f:0000-ffff'/>\n";
xml << " <map mode='shadow' address='80-bf:8000-ffff'/>\n";
xml << " <map mode='linear' address='c0-ff:0000-ffff'/>\n";
xml << " </rom>\n";
if(ram_size > 0) {
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='20-3f:6000-7fff'/>\n";
xml << " <map mode='linear' address='a0-bf:6000-7fff'/>\n";
if((rom_size > 0x200000) || (ram_size > 32 * 1024)) {
xml << " <map mode='linear' address='70-7f:0000-7fff'/>\n";
} else {
xml << " <map mode='linear' address='70-7f:0000-ffff'/>\n";
}
xml << " </ram>\n";
}
} else if(mapper == ExLoROM) {
xml << " <rom>\n";
xml << " <map mode='linear' address='00-3f:8000-ffff'/>\n";
xml << " <map mode='linear' address='40-7f:0000-ffff'/>\n";
xml << " <map mode='linear' address='80-bf:8000-ffff'/>\n";
xml << " </rom>\n";
if(ram_size > 0) {
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='20-3f:6000-7fff'/>\n";
xml << " <map mode='linear' address='a0-bf:6000-7fff'/>\n";
xml << " <map mode='linear' address='70-7f:0000-7fff'/>\n";
xml << " </ram>\n";
}
} else if(mapper == ExHiROM) {
xml << " <rom>\n";
xml << " <map mode='shadow' address='00-3f:8000-ffff' offset='400000'/>\n";
xml << " <map mode='linear' address='40-7f:0000-ffff' offset='400000'/>\n";
xml << " <map mode='shadow' address='80-bf:8000-ffff' offset='000000'/>\n";
xml << " <map mode='linear' address='c0-ff:0000-ffff' offset='000000'/>\n";
xml << " </rom>\n";
if(ram_size > 0) {
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='20-3f:6000-7fff'/>\n";
xml << " <map mode='linear' address='a0-bf:6000-7fff'/>\n";
if((rom_size > 0x200000) || (ram_size > 32 * 1024)) {
xml << " <map mode='linear' address='70-7f:0000-7fff'/>\n";
} else {
xml << " <map mode='linear' address='70-7f:0000-ffff'/>\n";
}
xml << " </ram>\n";
}
} else if(mapper == SuperFXROM) {
xml << " <superfx revision='2'>\n";
xml << " <rom>\n";
xml << " <map mode='linear' address='00-3f:8000-ffff'/>\n";
xml << " <map mode='linear' address='40-5f:0000-ffff'/>\n";
xml << " <map mode='linear' address='80-bf:8000-ffff'/>\n";
xml << " <map mode='linear' address='c0-df:0000-ffff'/>\n";
xml << " </rom>\n";
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='00-3f:6000-7fff' size='2000'/>\n";
xml << " <map mode='linear' address='60-7f:0000-ffff'/>\n";
xml << " <map mode='linear' address='80-bf:6000-7fff' size='2000'/>\n";
xml << " <map mode='linear' address='e0-ff:0000-ffff'/>\n";
xml << " </ram>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:3000-32ff'/>\n";
xml << " <map address='80-bf:3000-32ff'/>\n";
xml << " </mmio>\n";
xml << " </superfx>\n";
} else if(mapper == SA1ROM) {
xml << " <sa1>\n";
xml << " <rom>\n";
xml << " <map mode='linear' address='00-3f:8000-ffff'/>\n";
xml << " <map mode='linear' address='80-bf:8000-ffff'/>\n";
xml << " <map mode='linear' address='c0-ff:0000-ffff'/>\n";
xml << " </rom>\n";
xml << " <iram size='800'>\n";
xml << " <map mode='linear' address='00-3f:3000-37ff'/>\n";
xml << " <map mode='linear' address='80-bf:3000-37ff'/>\n";
xml << " </iram>\n";
xml << " <bwram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='00-3f:6000-7fff'/>\n";
xml << " <map mode='linear' address='40-4f:0000-ffff'/>\n";
xml << " <map mode='linear' address='80-bf:6000-7fff'/>\n";
xml << " </bwram>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:2200-23ff'/>\n";
xml << " <map address='80-bf:2200-23ff'/>\n";
xml << " </mmio>\n";
xml << " </sa1>\n";
} else if(mapper == BSCLoROM) {
xml << " <rom>\n";
xml << " <map mode='linear' address='00-1f:8000-ffff' offset='000000'/>\n";
xml << " <map mode='linear' address='20-3f:8000-ffff' offset='100000'/>\n";
xml << " <map mode='linear' address='80-9f:8000-ffff' offset='200000'/>\n";
xml << " <map mode='linear' address='a0-bf:8000-ffff' offset='100000'/>\n";
xml << " </rom>\n";
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='70-7f:0000-7fff'/>\n";
xml << " <map mode='linear' address='f0-ff:0000-7fff'/>\n";
xml << " </ram>\n";
xml << " <bsx>\n";
xml << " <slot>\n";
xml << " <map mode='linear' address='c0-ef:0000-ffff'/>\n";
xml << " </slot>\n";
xml << " </bsx>\n";
} else if(mapper == BSCHiROM) {
xml << " <rom>\n";
xml << " <map mode='shadow' address='00-1f:8000-ffff'/>\n";
xml << " <map mode='linear' address='40-5f:0000-ffff'/>\n";
xml << " <map mode='shadow' address='80-9f:8000-ffff'/>\n";
xml << " <map mode='linear' address='c0-df:0000-ffff'/>\n";
xml << " </rom>\n";
xml << " <ram size='" << strhex(ram_size) << "'>\n";
xml << " <map mode='linear' address='20-3f:6000-7fff'/>\n";
xml << " <map mode='linear' address='a0-bf:6000-7fff'/>\n";
xml << " </ram>\n";
xml << " <bsx>\n";
xml << " <slot>\n";
xml << " <map mode='shadow' address='20-3f:8000-ffff'/>\n";
xml << " <map mode='linear' address='60-7f:0000-ffff'/>\n";
xml << " <map mode='shadow' address='a0-bf:8000-ffff'/>\n";
xml << " <map mode='linear' address='e0-ff:0000-ffff'/>\n";
xml << " </slot>\n";
xml << " </bsx>\n";
} else if(mapper == BSXROM) {
xml << " <rom>\n";
xml << " <map mode='linear' address='00-3f:8000-ffff'/>\n";
xml << " <map mode='linear' address='80-bf:8000-ffff'/>\n";
xml << " </rom>\n";
xml << " <bsx>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:5000-5fff'/>\n";
xml << " <map address='80-bf:5000-5fff'/>\n";
xml << " </mmio>\n";
xml << " </bsx>\n";
} else if(mapper == STROM) {
xml << " <rom>\n";
xml << " <map mode='linear' address='00-1f:8000-ffff'/>\n";
xml << " <map mode='linear' address='80-9f:8000-ffff'/>\n";
xml << " </rom>\n";
xml << " <sufamiturbo>\n";
xml << " <slot id='A'>\n";
xml << " <rom>\n";
xml << " <map mode='linear' address='20-3f:8000-ffff'/>\n";
xml << " <map mode='linear' address='a0-bf:8000-ffff'/>\n";
xml << " </rom>\n";
xml << " <ram>\n";
xml << " <map mode='linear' address='60-63:8000-ffff'/>\n";
xml << " <map mode='linear' address='e0-e3:8000-ffff'/>\n";
xml << " </ram>\n";
xml << " </slot>\n";
xml << " <slot id='B'>\n";
xml << " <rom>\n";
xml << " <map mode='linear' address='40-5f:8000-ffff'/>\n";
xml << " <map mode='linear' address='c0-df:8000-ffff'/>\n";
xml << " </rom>\n";
xml << " <ram>\n";
xml << " <map mode='linear' address='70-73:8000-ffff'/>\n";
xml << " <map mode='linear' address='f0-f3:8000-ffff'/>\n";
xml << " </ram>\n";
xml << " </slot>\n";
xml << " </sufamiturbo>\n";
}
if(has_srtc) {
xml << " <srtc>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:2800-2801'/>\n";
xml << " <map address='80-bf:2800-2801'/>\n";
xml << " </mmio>\n";
xml << " </srtc>\n";
}
if(has_sdd1) {
xml << " <sdd1>\n";
xml << " <mcu>\n";
xml << " <map address='c0-ff:0000-ffff'/>\n";
xml << " </mcu>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:4800-4807'/>\n";
xml << " <map address='80-bf:4800-4807'/>\n";
xml << " </mmio>\n";
xml << " </sdd1>\n";
}
if(has_cx4) {
xml << " <cx4>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:6000-7fff'/>\n";
xml << " <map address='80-bf:6000-7fff'/>\n";
xml << " </mmio>\n";
xml << " </cx4>\n";
}
if(has_dsp1) {
xml << " <necdsp program='DSP-1B'>\n";
if(dsp1_mapper == DSP1LoROM1MB) {
xml << " <dr>\n";
xml << " <map address='20-3f:8000-bfff'/>\n";
xml << " <map address='a0-bf:8000-bfff'/>\n";
xml << " </dr>\n";
xml << " <sr>\n";
xml << " <map address='20-3f:c000-ffff'/>\n";
xml << " <map address='a0-bf:c000-ffff'/>\n";
xml << " </sr>\n";
} else if(dsp1_mapper == DSP1LoROM2MB) {
xml << " <dr>\n";
xml << " <map address='60-6f:0000-3fff'/>\n";
xml << " <map address='e0-ef:0000-3fff'/>\n";
xml << " </dr>\n";
xml << " <sr>\n";
xml << " <map address='60-6f:4000-7fff'/>\n";
xml << " <map address='e0-ef:4000-7fff'/>\n";
xml << " </sr>\n";
} else if(dsp1_mapper == DSP1HiROM) {
xml << " <dr>\n";
xml << " <map address='00-1f:6000-6fff'/>\n";
xml << " <map address='80-9f:6000-6fff'/>\n";
xml << " </dr>\n";
xml << " <sr>\n";
xml << " <map address='00-1f:7000-7fff'/>\n";
xml << " <map address='80-9f:7000-7fff'/>\n";
xml << " </sr>\n";
}
xml << " </necdsp>\n";
}
if(has_dsp2) {
xml << " <necdsp program='DSP-2'>\n";
xml << " <dr>\n";
xml << " <map address='20-3f:8000-bfff'/>\n";
xml << " <map address='a0-bf:8000-bfff'/>\n";
xml << " </dr>\n";
xml << " <sr>\n";
xml << " <map address='20-3f:c000-ffff'/>\n";
xml << " <map address='a0-bf:c000-ffff'/>\n";
xml << " </sr>\n";
xml << " </necdsp>\n";
}
if(has_dsp3) {
xml << " <necdsp program='DSP-3'>\n";
xml << " <dr>\n";
xml << " <map address='20-3f:8000-bfff'/>\n";
xml << " <map address='a0-bf:8000-bfff'/>\n";
xml << " </dr>\n";
xml << " <sr>\n";
xml << " <map address='20-3f:c000-ffff'/>\n";
xml << " <map address='a0-bf:c000-ffff'/>\n";
xml << " </sr>\n";
xml << " </necdsp>\n";
}
if(has_dsp4) {
xml << " <necdsp program='DSP-4'>\n";
xml << " <dr>\n";
xml << " <map address='30-3f:8000-bfff'/>\n";
xml << " <map address='b0-bf:8000-bfff'/>\n";
xml << " </dr>\n";
xml << " <sr>\n";
xml << " <map address='30-3f:c000-ffff'/>\n";
xml << " <map address='b0-bf:c000-ffff'/>\n";
xml << " </sr>\n";
xml << " </necdsp>\n";
}
if(has_obc1) {
xml << " <obc1>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:6000-7fff'/>\n";
xml << " <map address='80-bf:6000-7fff'/>\n";
xml << " </mmio>\n";
xml << " </obc1>\n";
}
if(has_st010) {
xml << " <setadsp program='ST-0010'>\n";
xml << " <mmio>\n";
xml << " <map address='68-6f:0000-0fff'/>\n";
xml << " <map address='e8-ef:0000-0fff'/>\n";
xml << " </mmio>\n";
xml << " </setadsp>\n";
}
if(has_st011) {
//ST-0011 addresses not verified; chip is unsupported
xml << " <setadsp program='ST-0011'>\n";
xml << " <mmio>\n";
xml << " <map address='68-6f:0000-0fff'/>\n";
xml << " <map address='e8-ef:0000-0fff'/>\n";
xml << " </mmio>\n";
xml << " </setadsp>\n";
}
if(has_st018) {
xml << " <setarisc program='ST-0018'>\n";
xml << " <mmio>\n";
xml << " <map address='00-3f:3800-38ff'/>\n";
xml << " <map address='80-bf:3800-38ff'/>\n";
xml << " </mmio>\n";
xml << " </setarisc>\n";
}
xml << "</cartridge>\n";
xml_memory_map = xml;
}
void snes_information::read_header(const uint8_t *data, unsigned size) {
type = TypeUnknown;
mapper = LoROM;
dsp1_mapper = DSP1Unmapped;
region = NTSC;
rom_size = size;
ram_size = 0;
has_bsx_slot = false;
has_superfx = false;
has_sa1 = false;
has_srtc = false;
has_sdd1 = false;
has_spc7110 = false;
has_spc7110rtc = false;
has_cx4 = false;
has_dsp1 = false;
has_dsp2 = false;
has_dsp3 = false;
has_dsp4 = false;
has_obc1 = false;
has_st010 = false;
has_st011 = false;
has_st018 = false;
//=====================
//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 = TypeGameBoy;
return;
}
}
const unsigned index = find_header(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;
ram_size = 1024 << (data[index + RamSize] & 7);
if(ram_size == 1024) ram_size = 0; //no RAM present
//0, 1, 13 = NTSC; 2 - 12 = PAL
region = (regionid <= 1 || regionid >= 13) ? NTSC : 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 = TypeBsx;
mapper = BSXROM;
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 = TypeSufamiTurboBios;
} else {
type = TypeSufamiTurbo;
}
mapper = STROM;
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 = TypeSuperGameBoy2Bios;
return;
}
if(!memcmp(data + index, "Super GAMEBOY", 13)) {
type = TypeSuperGameBoy1Bios;
return;
}
//=====================
//detect standard carts
//=====================
//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 = TypeBsxBios;
mapper = BSXROM;
region = NTSC; //BS-X only released in Japan
return; //RAM size handled internally by load_cart_bsx() -> BSXCart class
} else {
type = TypeBsxSlotted;
mapper = (index == 0x7fc0 ? BSCLoROM : BSCHiROM);
region = NTSC; //BS-X slotted cartridges only released in Japan
}
} else {
//standard cart
type = TypeNormal;
if(index == 0x7fc0 && size >= 0x401000) {
mapper = ExLoROM;
} else if(index == 0x7fc0 && mapperid == 0x32) {
mapper = ExLoROM;
} else if(index == 0x7fc0) {
mapper = LoROM;
} else if(index == 0xffc0) {
mapper = HiROM;
} else { //index == 0x40ffc0
mapper = ExHiROM;
}
}
if(mapperid == 0x20 && (rom_type == 0x13 || rom_type == 0x14 || rom_type == 0x15 || rom_type == 0x1a)) {
has_superfx = true;
mapper = SuperFXROM;
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;
mapper = SA1ROM;
}
if(mapperid == 0x35 && rom_type == 0x55) {
has_srtc = 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_spc7110rtc = (rom_type == 0xf9);
mapper = SPC7110ROM;
}
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_mapper = DSP1LoROM1MB;
} else if((mapperid & 0x2f) == 0x20) {
dsp1_mapper = DSP1LoROM2MB;
} else if((mapperid & 0x2f) == 0x21) {
dsp1_mapper = DSP1HiROM;
}
}
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;
}
}
unsigned snes_information::find_header(const uint8_t *data, unsigned size) {
unsigned score_lo = score_header(data, size, 0x007fc0);
unsigned score_hi = score_header(data, size, 0x00ffc0);
unsigned score_ex = score_header(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;
}
}
unsigned snes_information::score_header(const uint8_t *data, unsigned size, unsigned addr) {
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;
}
unsigned snes_information::gameboy_ram_size(const uint8_t *data, unsigned size) {
if(size < 512) return 0;
switch(data[0x0149]) {
case 0x00: return 0 * 1024;
case 0x01: return 8 * 1024;
case 0x02: return 8 * 1024;
case 0x03: return 32 * 1024;
case 0x04: return 128 * 1024;
case 0x05: return 128 * 1024;
default: return 128 * 1024;
}
}
bool snes_information::gameboy_has_rtc(const uint8_t *data, unsigned size) {
if(size < 512) return false;
if(data[0x0147] == 0x0f ||data[0x0147] == 0x10) return true;
return false;
}
}
#endif
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