mirror of https://github.com/bsnes-emu/bsnes.git
72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
struct MegaDriveCartridge {
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MegaDriveCartridge(string location, uint8_t* data, uint size);
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string manifest;
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//private:
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struct Information {
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} information;
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};
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MegaDriveCartridge::MegaDriveCartridge(string location, uint8_t* data, uint size) {
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if(size < 0x200) return;
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string ramMode = "none";
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uint32_t ramFrom = 0;
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ramFrom |= data[0x01b4] << 24;
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ramFrom |= data[0x01b5] << 16;
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ramFrom |= data[0x01b6] << 8;
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ramFrom |= data[0x01b7] << 0;
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uint32_t ramTo = 0;
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ramTo |= data[0x01b8] << 24;
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ramTo |= data[0x01b9] << 16;
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ramTo |= data[0x01ba] << 8;
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ramTo |= data[0x01bb] << 0;
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if(!(ramFrom & 1) && !(ramTo & 1)) ramMode = "hi";
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if( (ramFrom & 1) && (ramTo & 1)) ramMode = "lo";
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if(!(ramFrom & 1) && (ramTo & 1)) ramMode = "word";
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if(data[0x01b0] != 'R' || data[0x01b1] != 'A') ramMode = "none";
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uint32_t ramSize = ramTo - ramFrom + 1;
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if(ramMode == "hi") ramSize = (ramTo >> 1) - (ramFrom >> 1) + 1;
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if(ramMode == "lo") ramSize = (ramTo >> 1) - (ramFrom >> 1) + 1;
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if(ramMode == "word") ramSize = ramTo - ramFrom + 1;
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if(ramMode != "none") ramSize = bit::round(min(0x20000, ramSize));
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if(ramMode == "none") ramSize = 0;
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string_vector regions;
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string region = slice((const char*)&data[0x1f0], 0, 16).trimRight(" ");
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if(!regions) {
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if(region == "JAPAN" ) regions.append("ntsc-j");
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if(region == "EUROPE") regions.append("pal");
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}
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if(!regions) {
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if(region.find("J")) regions.append("ntsc-j");
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if(region.find("U")) regions.append("ntsc-u");
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if(region.find("E")) regions.append("pal");
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if(region.find("W")) regions.append("ntsc-j", "ntsc-u", "pal");
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}
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if(!regions && region.size() == 1) {
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uint8_t field = region.hex();
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if(field & 0x01) regions.append("ntsc-j");
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if(field & 0x04) regions.append("ntsc-u");
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if(field & 0x08) regions.append("pal");
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}
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if(!regions) {
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regions.append("ntsc-j");
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}
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manifest.append("board region=", regions.left(), "\n");
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manifest.append(" rom name=program.rom size=0x", hex(size), "\n");
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if(ramSize && ramMode != "none")
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manifest.append(" ram name=save.ram size=0x", hex(ramSize), " offset=0x", hex(ramFrom), " mode=", ramMode, "\n");
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manifest.append("\n");
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manifest.append("information\n");
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manifest.append(" title: ", Location::prefix(location), "\n");
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manifest.append("\n");
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manifest.append("note: heuristically generated by icarus\n");
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}
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