mirror of https://github.com/bsnes-emu/bsnes.git
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
#include <ms/ms.hpp>
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namespace MasterSystem {
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Cartridge cartridge;
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#include "mapper.cpp"
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#include "serialization.cpp"
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auto Cartridge::load() -> bool {
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information = {};
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if(Model::MasterSystem()) {
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if(auto pathID = platform->load(ID::MasterSystem, "Master System", "ms")) {
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information.pathID = pathID();
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} else return false;
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}
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if(Model::GameGear()) {
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if(auto pathID = platform->load(ID::GameGear, "Game Gear", "gg")) {
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information.pathID = pathID();
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} else return false;
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}
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if(auto fp = platform->open(pathID(), "manifest.bml", File::Read, File::Required)) {
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information.manifest = fp->reads();
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} else return false;
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auto document = BML::unserialize(information.manifest);
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information.title = document["information/title"].text();
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if(auto node = document["board/rom"]) {
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rom.size = node["size"].natural();
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rom.mask = bit::round(rom.size) - 1;
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if(rom.size) {
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rom.data = new uint8[rom.mask + 1];
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if(auto name = node["name"].text()) {
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if(auto fp = platform->open(pathID(), name, File::Read, File::Required)) {
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fp->read(rom.data, rom.size);
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}
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}
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}
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}
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if(auto node = document["board/ram"]) {
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ram.size = node["size"].natural();
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ram.mask = bit::round(ram.size) - 1;
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if(ram.size) {
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ram.data = new uint8[ram.mask + 1];
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if(auto name = node["name"].text()) {
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if(auto fp = platform->open(pathID(), name, File::Read)) {
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fp->read(ram.data, ram.size);
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}
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}
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}
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}
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return true;
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}
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auto Cartridge::save() -> void {
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auto document = BML::unserialize(information.manifest);
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if(auto name = document["board/ram/name"].text()) {
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if(auto fp = platform->open(pathID(), name, File::Write)) {
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fp->write(ram.data, ram.size);
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}
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}
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}
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auto Cartridge::unload() -> void {
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delete[] rom.data;
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delete[] ram.data;
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rom = {};
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ram = {};
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}
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auto Cartridge::power() -> void {
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memory::fill(&mapper, sizeof(Mapper));
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mapper.romPage0 = 0;
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mapper.romPage1 = 1;
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mapper.romPage2 = 2;
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}
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auto Cartridge::Memory::mirror(uint addr, uint size) -> uint {
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uint base = 0;
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uint mask = 1 << 21;
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while(addr >= size) {
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while(!(addr & mask)) mask >>= 1;
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addr -= mask;
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if(size > mask) {
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size -= mask;
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base += mask;
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}
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mask >>= 1;
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}
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return base + addr;
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}
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auto Cartridge::Memory::read(uint addr) -> uint8 {
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if(!size) return 0x00;
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return this->data[mirror(addr, size)];
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}
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auto Cartridge::Memory::write(uint addr, uint8 data) -> void {
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if(!size) return;
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this->data[mirror(addr, size)] = data;
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}
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}
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