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struct WonderSwan : Cartridge {
auto name() -> string override { return "WonderSwan"; }
auto extensions() -> vector<string> override { return {"ws"}; }
auto load(string location) -> bool override;
auto save(string location) -> bool override;
auto analyze(vector<u8>& rom) -> string;
};
auto WonderSwan::load(string location) -> bool {
vector<u8> rom;
if(directory::exists(location)) {
append(rom, {location, "program.rom"});
} else if(file::exists(location)) {
rom = Cartridge::read(location);
}
if(!rom) return false;
this->location = location;
this->manifest = analyze(rom);
auto document = BML::unserialize(manifest);
if(!document) return false;
pak = new vfs::directory;
pak->setAttribute("title", document["game/title"].string());
pak->setAttribute("orientation", document["game/orientation"].string());
pak->append("manifest.bml", manifest);
pak->append("program.rom", rom);
if(auto node = document["game/board/memory(type=RAM,content=Save)"]) {
Medium::load(node, ".ram");
}
if(auto node = document["game/board/memory(type=EEPROM,content=Save)"]) {
Medium::load(node, ".eeprom");
}
if(auto node = document["game/board/memory(type=RTC,content=Time)"]) {
Medium::load(node, ".rtc");
}
return true;
}
auto WonderSwan::save(string location) -> bool {
auto document = BML::unserialize(manifest);
if(auto node = document["game/board/memory(type=RAM,content=Save)"]) {
Medium::save(node, ".ram");
}
if(auto node = document["game/board/memory(type=EEPROM,content=Save)"]) {
Medium::save(node, ".eeprom");
}
if(auto node = document["game/board/memory(type=RTC,content=Time)"]) {
Medium::save(node, ".rtc");
}
return true;
}
auto WonderSwan::analyze(vector<u8>& rom) -> string {
if(rom.size() < 0x10000) return {};
auto hash = Hash::SHA256(rom).digest();
auto metadata = &rom[rom.size() - 16];
bool color = metadata[7];
string ramType;
u32 ramSize = 0;
switch(metadata[11]) {
case 0x01: ramType = "RAM"; ramSize = 8_KiB; break;
case 0x02: ramType = "RAM"; ramSize = 32_KiB; break;
case 0x03: ramType = "RAM"; ramSize = 128_KiB; break;
case 0x04: ramType = "RAM"; ramSize = 256_KiB; break;
case 0x05: ramType = "RAM"; ramSize = 512_KiB; break;
case 0x10: ramType = "EEPROM"; ramSize = 128; break;
case 0x20: ramType = "EEPROM"; ramSize = 2048; break;
case 0x50: ramType = "EEPROM"; ramSize = 1024; break;
}
bool orientation = metadata[12] & 1; //0 = horizontal; 1 = vertical
bool hasRTC = metadata[13] & 1;
string s;
s += "game\n";
s +={" sha256: ", hash, "\n"};
s +={" name: ", Medium::name(location), "\n"};
s +={" title: ", Medium::name(location), "\n"};
s +={" orientation: ", !orientation ? "horizontal" : "vertical", "\n"};
s += " board\n";
s += " memory\n";
s += " type: ROM\n";
s +={" size: 0x", hex(rom.size()), "\n"};
s += " content: Program\n";
if(ramType && ramSize) {
s += " memory\n";
s +={" type: ", ramType, "\n"};
s +={" size: 0x", hex(ramSize), "\n"};
s += " content: Save\n";
}
if(hasRTC) {
s += " memory\n";
s += " type: RTC\n";
s += " size: 0x10\n";
s += " content: Time\n";
}
return s;
}
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