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super-famicom.cpp
605 lines (510 loc) · 23.1 KB
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super-famicom.cpp
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namespace Heuristics {
struct SuperFamicom {
SuperFamicom(vector<uint8_t>& data, string location);
explicit operator bool() const;
auto manifest() const -> string;
auto region() const -> string;
auto videoRegion() const -> string;
auto revision() const -> string;
auto board() const -> string;
auto title() const -> string;
auto serial() const -> string;
auto romSize() const -> uint;
auto programRomSize() const -> uint;
auto dataRomSize() const -> uint;
auto expansionRomSize() const -> uint;
auto firmwareRomSize() const -> uint;
auto ramSize() const -> uint;
auto expansionRamSize() const -> uint;
auto nonVolatile() const -> bool;
private:
auto size() const -> uint { return data.size(); }
auto scoreHeader(uint address) -> uint;
auto firmwareARM() const -> string;
auto firmwareEXNEC() const -> string;
auto firmwareGB() const -> string;
auto firmwareHITACHI() const -> string;
auto firmwareNEC() const -> string;
vector<uint8_t>& data;
string location;
uint headerAddress = 0;
};
SuperFamicom::SuperFamicom(vector<uint8_t>& data, string location) : data(data), location(location) {
if((size() & 0x7fff) == 512) {
//remove header if present
memory::move(&data[0], &data[512], size() - 512);
data.resize(size() - 512);
}
if(size() < 0x8000) return; //ignore images too small to be valid
uint LoROM = scoreHeader( 0x7fb0);
uint HiROM = scoreHeader( 0xffb0);
uint ExLoROM = scoreHeader(0x407fb0);
uint ExHiROM = scoreHeader(0x40ffb0);
if(ExLoROM) ExLoROM += 4;
if(ExHiROM) ExHiROM += 4;
if(LoROM >= HiROM && LoROM >= ExLoROM && LoROM >= ExHiROM) headerAddress = 0x7fb0;
else if(HiROM >= ExLoROM && HiROM >= ExHiROM) headerAddress = 0xffb0;
else if(ExLoROM >= ExHiROM) headerAddress = 0x407fb0;
else headerAddress = 0x40ffb0;
}
SuperFamicom::operator bool() const {
return headerAddress;
}
auto SuperFamicom::manifest() const -> string {
if(!operator bool()) return {};
string output;
output.append("game\n");
output.append(" sha256: ", Hash::SHA256(data).digest(), "\n");
output.append(" label: ", Location::prefix(location), "\n");
output.append(" name: ", Location::prefix(location), "\n");
output.append(" title: ", title(), "\n");
output.append(" region: ", region(), "\n");
output.append(" revision: ", revision(), "\n");
output.append(" board: ", board(), "\n");
auto board = this->board().trimRight("#A", 1L).split("-");
if(auto size = romSize()) {
if(board(0) == "SPC7110" && size > 0x100000) {
output.append(Memory{}.type("ROM").size(0x100000).content("Program").text());
output.append(Memory{}.type("ROM").size(size - 0x100000).content("Data").text());
} else if(board(0) == "EXSPC7110" && size == 0x700000) {
//Tengai Maykou Zero (fan translation)
output.append(Memory{}.type("ROM").size(0x100000).content("Program").text());
output.append(Memory{}.type("ROM").size(0x500000).content("Data").text());
output.append(Memory{}.type("ROM").size(0x100000).content("Expansion").text());
} else {
output.append(Memory{}.type("ROM").size(size).content("Program").text());
}
}
if(auto size = ramSize()) {
output.append(Memory{}.type("RAM").size(size).content("Save").text());
}
if(auto size = expansionRamSize()) {
output.append(Memory{}.type("RAM").size(size).content("Save").text());
}
if(0) {
} else if(board(0) == "ARM") {
output.append(Memory{}.type("ROM").size(0x20000).content("Program").manufacturer("SETA").architecture("ARM6").identifier(firmwareARM()).text());
output.append(Memory{}.type("ROM").size( 0x8000).content("Data" ).manufacturer("SETA").architecture("ARM6").identifier(firmwareARM()).text());
output.append(Memory{}.type("RAM").size( 0x4000).content("Data" ).manufacturer("SETA").architecture("ARM6").identifier(firmwareARM()).isVolatile().text());
output.append(Oscillator{}.frequency(21'440'000).text());
} else if(board(0) == "BS" && board(1) == "MCC") {
output.append(Memory{}.type("RAM").size(0x80000).content("Download").text());
} else if(board(0) == "EXNEC") {
output.append(Memory{}.type("ROM").size(0xc000).content("Program").manufacturer("NEC").architecture("uPD96050").identifier(firmwareEXNEC()).text());
output.append(Memory{}.type("ROM").size(0x1000).content("Data" ).manufacturer("NEC").architecture("uPD96050").identifier(firmwareEXNEC()).text());
output.append(Memory{}.type("RAM").size(0x1000).content("Data" ).manufacturer("NEC").architecture("uPD96050").identifier(firmwareEXNEC()).text());
output.append(Oscillator{}.frequency(firmwareEXNEC() == "ST010" ? 11'000'000 : 15'000'000).text());
} else if(board(0) == "GB") {
output.append(Memory{}.type("ROM").size(0x100).content("Boot").manufacturer("Nintendo").architecture("LR35902").identifier(firmwareGB()).text());
if(firmwareGB() == "SGB2")
output.append(Oscillator{}.frequency(20'971'520).text());
} else if(board(0) == "GSU") {
//todo: MARIO CHIP 1 uses CPU oscillator
output.append(Oscillator{}.frequency(21'440'000).text());
} else if(board(0) == "HITACHI") {
output.append(Memory{}.type("ROM").size(0xc00).content("Data").manufacturer("Hitachi").architecture("HG51BS169").identifier(firmwareHITACHI()).text());
output.append(Memory{}.type("RAM").size(0xc00).content("Data").manufacturer("Hitachi").architecture("HG51BS169").identifier(firmwareHITACHI()).isVolatile().text());
output.append(Oscillator{}.frequency(20'000'000).text());
} else if(board(0) == "NEC") {
output.append(Memory{}.type("ROM").size(0x1800).content("Program").manufacturer("NEC").architecture("uPD7725").identifier(firmwareNEC()).text());
output.append(Memory{}.type("ROM").size( 0x800).content("Data" ).manufacturer("NEC").architecture("uPD7725").identifier(firmwareNEC()).text());
output.append(Memory{}.type("RAM").size( 0x200).content("Data" ).manufacturer("NEC").architecture("uPD7725").identifier(firmwareNEC()).isVolatile().text());
output.append(Oscillator{}.frequency(7'600'000).text());
} else if(board(0) == "SA1" || board(1) == "SA1") { //SA1-* or BS-SA1-*
output.append(Memory{}.type("RAM").size(0x800).content("Internal").isVolatile().text());
}
if(board.right() == "EPSONRTC") {
output.append(Memory{}.type("RTC").size(0x10).content("Time").manufacturer("Epson").text());
} else if(board.right() == "SHARPRTC") {
output.append(Memory{}.type("RTC").size(0x10).content("Time").manufacturer("Sharp").text());
}
return output;
}
auto SuperFamicom::region() const -> string {
//Unlicensed software (homebrew, ROM hacks, etc) often change the standard region code,
//and then neglect to change the extended header region code. Thanks to that, we can't
//decode and display the full game serial + region code.
return videoRegion();
string region;
char A = data[headerAddress + 0x02]; //game type
char B = data[headerAddress + 0x03]; //game code
char C = data[headerAddress + 0x04]; //game code
char D = data[headerAddress + 0x05]; //region code (new; sometimes ambiguous)
auto E = data[headerAddress + 0x29]; //region code (old)
auto valid = [](char n) { return (n >= '0' && n <= '9') || (n >= 'A' && n <= 'Z'); };
if(data[headerAddress + 0x2a] == 0x33 && valid(A) && valid(B) & valid(C) & valid(D)) {
string code{A, B, C, D};
if(D == 'B') region = {"SNS-", code, "-BRA"};
if(D == 'C') region = {"SNSN-", code, "-ROC"};
if(D == 'D') region = {"SNSP-", code, "-NOE"};
if(D == 'E') region = {"SNS-", code, "-USA"};
if(D == 'F') region = {"SNSP-", code, "-FRA"};
if(D == 'H') region = {"SNSP-", code, "-HOL"};
if(D == 'I') region = {"SNSP-", code, "-ITA"};
if(D == 'J') region = {"SHVC-", code, "-JPN"};
if(D == 'K') region = {"SNSN-", code, "-KOR"};
if(D == 'N') region = {"SNS-", code, "-CAN"};
if(D == 'P') region = {"SNSP-", code, "-EUR"};
if(D == 'S') region = {"SNSP-", code, "-ESP"};
if(D == 'U') region = {"SNSP-", code, "-AUS"};
if(D == 'X') region = {"SNSP-", code, "-SCN"};
}
if(!region) {
if(E == 0x00) region = {"JPN"};
if(E == 0x01) region = {"USA"};
if(E == 0x02) region = {"EUR"};
if(E == 0x03) region = {"SCN"};
if(E == 0x06) region = {"FRA"};
if(E == 0x07) region = {"HOL"};
if(E == 0x08) region = {"ESP"};
if(E == 0x09) region = {"NOE"};
if(E == 0x0a) region = {"ITA"};
if(E == 0x0b) region = {"ROC"};
if(E == 0x0d) region = {"KOR"};
if(E == 0x0f) region = {"CAN"};
if(E == 0x10) region = {"BRA"};
if(E == 0x11) region = {"AUS"};
if(E == 0x12) region = {"SCN"};
}
return region ? region : "NTSC";
}
auto SuperFamicom::videoRegion() const -> string {
auto region = data[headerAddress + 0x29];
if(region == 0x00) return "NTSC"; //JPN
if(region == 0x01) return "NTSC"; //USA
if(region == 0x0b) return "NTSC"; //ROC
if(region == 0x0d) return "NTSC"; //KOR
if(region == 0x0f) return "NTSC"; //CAN
if(region == 0x10) return "NTSC"; //BRA
return "PAL";
}
auto SuperFamicom::revision() const -> string {
string revision;
char A = data[headerAddress + 0x02]; //game type
char B = data[headerAddress + 0x03]; //game code
char C = data[headerAddress + 0x04]; //game code
char D = data[headerAddress + 0x05]; //region code (new; sometimes ambiguous)
auto E = data[headerAddress + 0x29]; //region code (old)
uint F = data[headerAddress + 0x2b]; //revision code
auto valid = [](char n) { return (n >= '0' && n <= '9') || (n >= 'A' && n <= 'Z'); };
if(data[headerAddress + 0x2a] == 0x33 && valid(A) && valid(B) & valid(C) & valid(D)) {
string code{A, B, C, D};
if(D == 'B') revision = {"SNS-", code, "-", F};
if(D == 'C') revision = {"SNSN-", code, "-", F};
if(D == 'D') revision = {"SNSP-", code, "-", F};
if(D == 'E') revision = {"SNS-", code, "-", F};
if(D == 'F') revision = {"SNSP-", code, "-", F};
if(D == 'H') revision = {"SNSP-", code, "-", F};
if(D == 'I') revision = {"SNSP-", code, "-", F};
if(D == 'J') revision = {"SHVC-", code, "-", F};
if(D == 'K') revision = {"SNSN-", code, "-", F};
if(D == 'N') revision = {"SNS-", code, "-", F};
if(D == 'P') revision = {"SNSP-", code, "-", F};
if(D == 'S') revision = {"SNSP-", code, "-", F};
if(D == 'U') revision = {"SNSP-", code, "-", F};
if(D == 'X') revision = {"SNSP-", code, "-", F};
}
if(!revision) {
revision = {"1.", F};
}
return revision ? revision : string{"1.", F};
}
//format: [slot]-[coprocessor]-[mapper]-[ram]-[rtc]
auto SuperFamicom::board() const -> string {
string board;
auto mapMode = data[headerAddress + 0x25];
auto cartridgeTypeLo = data[headerAddress + 0x26] & 15;
auto cartridgeTypeHi = data[headerAddress + 0x26] >> 4;
auto cartridgeSubType = data[headerAddress + 0x0f];
string mode;
if(mapMode == 0x20 || mapMode == 0x30) mode = "LOROM-";
if(mapMode == 0x21 || mapMode == 0x31) mode = "HIROM-";
if(mapMode == 0x22 || mapMode == 0x32) mode = "SDD1-";
if(mapMode == 0x23 || mapMode == 0x33) mode = "SA1-";
if(mapMode == 0x25 || mapMode == 0x35) mode = "EXHIROM-";
if(mapMode == 0x2a || mapMode == 0x3a) mode = "SPC7110-";
//many games will store an extra title character, overwriting the map mode
//further, ExLoROM mode is unofficial, and lacks a mapping mode value
if(!mode) {
if(headerAddress == 0x7fb0) mode = "LOROM-";
if(headerAddress == 0xffb0) mode = "HIROM-";
if(headerAddress == 0x407fb0) mode = "EXLOROM-";
if(headerAddress == 0x40ffb0) mode = "EXHIROM-";
}
//this game's title ovewrites the map mode with '!' (0x21), but is a LOROM game
if(title() == "YUYU NO QUIZ DE GO!GO") mode = "LOROM-";
if(mode == "LOROM-" && headerAddress == 0x407fb0) mode = "EXLOROM-";
bool epsonRTC = false;
bool sharpRTC = false;
if(serial() == "A9PJ") {
//Sufami Turbo (JPN)
board.append("ST-", mode);
} else if(serial() == "ZBSJ") {
//BS-X: Sore wa Namae o Nusumareta Machi no Monogatari (JPN)
board.append("BS-MCC-");
} else if(serial() == "042J") {
//Super Game Boy 2
board.append("GB-", mode);
} else if(serial().match("Z??J")) {
board.append("BS-", mode);
} else if(cartridgeTypeLo >= 0x3) {
if(cartridgeTypeHi == 0x0) board.append("NEC-", mode);
if(cartridgeTypeHi == 0x1) board.append("GSU-");
if(cartridgeTypeHi == 0x2) board.append("OBC1-", mode);
if(cartridgeTypeHi == 0x3) board.append("SA1-");
if(cartridgeTypeHi == 0x4) board.append("SDD1-");
if(cartridgeTypeHi == 0x5) board.append(mode), sharpRTC = true;
if(cartridgeTypeHi == 0xe && cartridgeTypeLo == 0x3) board.append("GB-", mode);
if(cartridgeTypeHi == 0xf && cartridgeTypeLo == 0x5 && cartridgeSubType == 0x00) board.append("SPC7110-");
if(cartridgeTypeHi == 0xf && cartridgeTypeLo == 0x9 && cartridgeSubType == 0x00) board.append("SPC7110-"), epsonRTC = true;
if(cartridgeTypeHi == 0xf && cartridgeSubType == 0x01) board.append("EXNEC-", mode);
if(cartridgeTypeHi == 0xf && cartridgeSubType == 0x02) board.append("ARM-", mode);
if(cartridgeTypeHi == 0xf && cartridgeSubType == 0x10) board.append("HITACHI-", mode);
}
if(!board) board.append(mode);
if(ramSize() || expansionRamSize()) board.append("RAM-");
if(epsonRTC) board.append("EPSONRTC-");
if(sharpRTC) board.append("SHARPRTC-");
board.trimRight("-", 1L);
if(board.beginsWith( "LOROM-RAM") && romSize() <= 0x200000) board.append("#A");
if(board.beginsWith("NEC-LOROM-RAM") && romSize() <= 0x100000) board.append("#A");
//Tengai Makyou Zero (fan translation)
if(board.beginsWith("SPC7110-") && data.size() == 0x700000) board.prepend("EX");
return board;
}
auto SuperFamicom::title() const -> string {
string label;
for(uint n = 0; n < 0x15; n++) {
auto x = data[headerAddress + 0x10 + n];
auto y = n == 0x14 ? 0 : data[headerAddress + 0x11 + n];
//null terminator (padding)
if(x == 0x00 || x == 0xff);
//ASCII
else if(x >= 0x20 && x <= 0x7e) label.append((char)x);
//Shift-JIS (half-width katakana)
else if(x == 0xa1) label.append("。");
else if(x == 0xa2) label.append("「");
else if(x == 0xa3) label.append("」");
else if(x == 0xa4) label.append("、");
else if(x == 0xa5) label.append("・");
else if(x == 0xa6) label.append("ヲ");
else if(x == 0xa7) label.append("ァ");
else if(x == 0xa8) label.append("ィ");
else if(x == 0xa9) label.append("ゥ");
else if(x == 0xaa) label.append("ェ");
else if(x == 0xab) label.append("ォ");
else if(x == 0xac) label.append("ャ");
else if(x == 0xad) label.append("ュ");
else if(x == 0xae) label.append("ョ");
else if(x == 0xaf) label.append("ッ");
else if(x == 0xb0) label.append("ー");
else if(x == 0xb1) label.append( "ア");
else if(x == 0xb2) label.append( "イ");
else if(x == 0xb3) label.append(y == 0xde ? "ヴ" : "ウ");
else if(x == 0xb4) label.append( "エ");
else if(x == 0xb5) label.append( "オ");
else if(x == 0xb6) label.append(y == 0xde ? "ガ" : "カ");
else if(x == 0xb7) label.append(y == 0xde ? "ギ" : "キ");
else if(x == 0xb8) label.append(y == 0xde ? "グ" : "ク");
else if(x == 0xb9) label.append(y == 0xde ? "ゲ" : "ケ");
else if(x == 0xba) label.append(y == 0xde ? "ゴ" : "コ");
else if(x == 0xbb) label.append(y == 0xde ? "ザ" : "サ");
else if(x == 0xbc) label.append(y == 0xde ? "ジ" : "シ");
else if(x == 0xbd) label.append(y == 0xde ? "ズ" : "ス");
else if(x == 0xbe) label.append(y == 0xde ? "ゼ" : "セ");
else if(x == 0xbf) label.append(y == 0xde ? "ゾ" : "ソ");
else if(x == 0xc0) label.append(y == 0xde ? "ダ" : "タ");
else if(x == 0xc1) label.append(y == 0xde ? "ヂ" : "チ");
else if(x == 0xc2) label.append(y == 0xde ? "ヅ" : "ツ");
else if(x == 0xc3) label.append(y == 0xde ? "デ" : "テ");
else if(x == 0xc4) label.append(y == 0xde ? "ド" : "ト");
else if(x == 0xc5) label.append("ナ");
else if(x == 0xc6) label.append("ニ");
else if(x == 0xc7) label.append("ヌ");
else if(x == 0xc8) label.append("ネ");
else if(x == 0xc9) label.append("ノ");
else if(x == 0xca) label.append(y == 0xdf ? "パ" : y == 0xde ? "バ" : "ハ");
else if(x == 0xcb) label.append(y == 0xdf ? "ピ" : y == 0xde ? "ビ" : "ヒ");
else if(x == 0xcc) label.append(y == 0xdf ? "プ" : y == 0xde ? "ブ" : "フ");
else if(x == 0xcd) label.append(y == 0xdf ? "ペ" : y == 0xde ? "ベ" : "ヘ");
else if(x == 0xce) label.append(y == 0xdf ? "ポ" : y == 0xde ? "ボ" : "ホ");
else if(x == 0xcf) label.append("マ");
else if(x == 0xd0) label.append("ミ");
else if(x == 0xd1) label.append("ム");
else if(x == 0xd2) label.append("メ");
else if(x == 0xd3) label.append("モ");
else if(x == 0xd4) label.append("ヤ");
else if(x == 0xd5) label.append("ユ");
else if(x == 0xd6) label.append("ヨ");
else if(x == 0xd7) label.append("ラ");
else if(x == 0xd8) label.append("リ");
else if(x == 0xd9) label.append("ル");
else if(x == 0xda) label.append("レ");
else if(x == 0xdb) label.append("ロ");
else if(x == 0xdc) label.append("ワ");
else if(x == 0xdd) label.append("ン");
else if(x == 0xde) label.append("\xef\xbe\x9e"); //dakuten
else if(x == 0xdf) label.append("\xef\xbe\x9f"); //handakuten
//unknown
else label.append("?");
//(han)dakuten skip
if(y == 0xde && x == 0xb3) n++;
if(y == 0xde && x >= 0xb6 && x <= 0xc4) n++;
if(y == 0xde && x >= 0xca && x <= 0xce) n++;
if(y == 0xdf && x >= 0xca && y <= 0xce) n++;
}
return label.strip();
}
auto SuperFamicom::serial() const -> string {
char A = data[headerAddress + 0x02]; //game type
char B = data[headerAddress + 0x03]; //game code
char C = data[headerAddress + 0x04]; //game code
char D = data[headerAddress + 0x05]; //region code (new; sometimes ambiguous)
auto valid = [](char n) { return (n >= '0' && n <= '9') || (n >= 'A' && n <= 'Z'); };
if(data[headerAddress + 0x2a] == 0x33 && valid(A) && valid(B) & valid(C) & valid(D)) {
return {A, B, C, D};
}
return "";
}
auto SuperFamicom::romSize() const -> uint {
return size() - firmwareRomSize();
}
auto SuperFamicom::programRomSize() const -> uint {
if(board().beginsWith("SPC7110-")) return 0x100000;
if(board().beginsWith("EXSPC7110-")) return 0x100000;
return romSize();
}
auto SuperFamicom::dataRomSize() const -> uint {
if(board().beginsWith("SPC7110-")) return romSize() - 0x100000;
if(board().beginsWith("EXSPC7110-")) return 0x500000;
return 0;
}
auto SuperFamicom::expansionRomSize() const -> uint {
if(board().beginsWith("EXSPC7110-")) return 0x100000;
return 0;
}
//detect if any firmware is appended to the ROM image, and return its size if so
auto SuperFamicom::firmwareRomSize() const -> uint {
auto cartridgeTypeLo = data[headerAddress + 0x26] & 15;
auto cartridgeTypeHi = data[headerAddress + 0x26] >> 4;
auto cartridgeSubType = data[headerAddress + 0x0f];
if(serial() == "042J" || (cartridgeTypeLo == 0x3 && cartridgeTypeHi == 0xe)) {
//Game Boy
if((size() & 0x7fff) == 0x100) return 0x100;
}
if(cartridgeTypeLo >= 0x3 && cartridgeTypeHi == 0xf && cartridgeSubType == 0x10) {
//Hitachi HG51BS169
if((size() & 0x7fff) == 0xc00) return 0xc00;
}
if(cartridgeTypeLo >= 0x3 && cartridgeTypeHi == 0x0) {
//NEC uPD7725
if((size() & 0x7fff) == 0x2000) return 0x2000;
}
if(cartridgeTypeLo >= 0x3 && cartridgeTypeHi == 0xf && cartridgeSubType == 0x01) {
//NEC uPD96050
if((size() & 0xffff) == 0xd000) return 0xd000;
}
if(cartridgeTypeLo >= 0x3 && cartridgeTypeHi == 0xf && cartridgeSubType == 0x02) {
//ARM6
if((size() & 0x3ffff) == 0x28000) return 0x28000;
}
return 0;
}
auto SuperFamicom::ramSize() const -> uint {
auto ramSize = data[headerAddress + 0x28] & 15;
if(ramSize > 8) ramSize = 8;
if(ramSize > 0) return 1024 << ramSize;
return 0;
}
auto SuperFamicom::expansionRamSize() const -> uint {
if(data[headerAddress + 0x2a] == 0x33) {
auto ramSize = data[headerAddress + 0x0d] & 15;
if(ramSize > 8) ramSize = 8;
if(ramSize > 0) return 1024 << ramSize;
}
if((data[headerAddress + 0x26] >> 4) == 1) {
//GSU: Starfox / Starwing lacks an extended header; but still has expansion RAM
return 0x8000;
}
return 0;
}
auto SuperFamicom::nonVolatile() const -> bool {
auto cartridgeTypeLo = data[headerAddress + 0x26] & 15;
return cartridgeTypeLo == 0x2 || cartridgeTypeLo == 0x5 || cartridgeTypeLo == 0x6;
}
auto SuperFamicom::scoreHeader(uint address) -> uint {
int score = 0;
if(size() < address + 0x50) return score;
uint8_t mapMode = data[address + 0x25] & ~0x10; //ignore FastROM bit
uint16_t complement = data[address + 0x2c] << 0 | data[address + 0x2d] << 8;
uint16_t checksum = data[address + 0x2e] << 0 | data[address + 0x2f] << 8;
uint16_t resetVector = data[address + 0x4c] << 0 | data[address + 0x4d] << 8;
if(resetVector < 0x8000) return score; //$00:0000-7fff is never ROM data
uint8_t opcode = data[(address & ~0x7fff) | (resetVector & 0x7fff)]; //first instruction executed
//most likely opcodes
if(opcode == 0x78 //sei
|| opcode == 0x18 //clc (clc; xce)
|| opcode == 0x38 //sec (sec; xce)
|| opcode == 0x9c //stz $nnnn (stz $4200)
|| opcode == 0x4c //jmp $nnnn
|| opcode == 0x5c //jml $nnnnnn
) score += 8;
//plausible opcodes
if(opcode == 0xc2 //rep #$nn
|| opcode == 0xe2 //sep #$nn
|| opcode == 0xad //lda $nnnn
|| opcode == 0xae //ldx $nnnn
|| opcode == 0xac //ldy $nnnn
|| opcode == 0xaf //lda $nnnnnn
|| opcode == 0xa9 //lda #$nn
|| opcode == 0xa2 //ldx #$nn
|| opcode == 0xa0 //ldy #$nn
|| opcode == 0x20 //jsr $nnnn
|| opcode == 0x22 //jsl $nnnnnn
) score += 4;
//implausible opcodes
if(opcode == 0x40 //rti
|| opcode == 0x60 //rts
|| opcode == 0x6b //rtl
|| opcode == 0xcd //cmp $nnnn
|| opcode == 0xec //cpx $nnnn
|| opcode == 0xcc //cpy $nnnn
) score -= 4;
//least likely opcodes
if(opcode == 0x00 //brk #$nn
|| opcode == 0x02 //cop #$nn
|| opcode == 0xdb //stp
|| opcode == 0x42 //wdm
|| opcode == 0xff //sbc $nnnnnn,x
) score -= 8;
if(checksum + complement == 0xffff) score += 4;
if(address == 0x7fb0 && mapMode == 0x20) score += 2;
if(address == 0xffb0 && mapMode == 0x21) score += 2;
return max(0, score);
}
auto SuperFamicom::firmwareARM() const -> string {
return "ST018";
}
auto SuperFamicom::firmwareEXNEC() const -> string {
if(title() == "EXHAUST HEAT2") return "ST010";
if(title() == "F1 ROC II") return "ST010";
if(title() == "2DAN MORITA SHOUGI") return "ST011";
return "ST010";
}
auto SuperFamicom::firmwareGB() const -> string {
if(title() == "Super GAMEBOY") return "SGB1";
if(title() == "Super GAMEBOY2") return "SGB2";
return "SGB1";
}
auto SuperFamicom::firmwareHITACHI() const -> string {
return "Cx4";
}
auto SuperFamicom::firmwareNEC() const -> string {
if(title() == "PILOTWINGS") return "DSP1";
if(title() == "DUNGEON MASTER") return "DSP2";
if(title() == "SDガンダムGX") return "DSP3";
if(title() == "PLANETS CHAMP TG3000") return "DSP4";
if(title() == "TOP GEAR 3000") return "DSP4";
return "DSP1B";
}
}