mirror of
https://github.com/SourMesen/Mesen2.git
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95 lines
No EOL
2.5 KiB
C++
95 lines
No EOL
2.5 KiB
C++
#pragma once
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#include "pch.h"
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#include "NES/Mappers/Nintendo/MMC1.h"
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#include "NES/NesConsole.h"
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#include "NES/NesMemoryManager.h"
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#include "Utilities/Serializer.h"
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#include "Utilities/FolderUtilities.h"
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class FnsMmc1 : public MMC1
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{
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private:
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vector<uint8_t> _kanjiRomData;
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MirroringType _mirroringSelect = MirroringType::Vertical;
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uint8_t _kanjiRomPos = 0;
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uint8_t _kanjiRomBank = 0;
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uint8_t _chrRamBank = 0;
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bool _workRamEnable1 = true;
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bool _workRamEnable2 = false;
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public:
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bool AllowRegisterRead() override { return true; }
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void InitMapper() override
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{
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MMC1::InitMapper();
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RemoveRegisterRange(0x8000, 0xFFFF, MemoryOperation::Read);
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AddRegisterRange(0x40AE, 0x40C0, MemoryOperation::Any);
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AddRegisterRange(0x5000, 0x5FFF, MemoryOperation::Read);
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VirtualFile chrData(FolderUtilities::CombinePath(FolderUtilities::GetFirmwareFolder(), "lh5323m1.bin"));
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if(chrData.IsValid()) {
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chrData.ReadFile(_kanjiRomData);
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} else {
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_kanjiRomData.resize(256 * 1024);
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}
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}
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void WriteRegister(uint16_t addr, uint8_t value) override
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{
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if(addr < 0x6000) {
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switch(addr) {
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case 0x40AE: _workRamEnable1 = value & 0x01; UpdateState(); break;
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case 0x40B0: _kanjiRomBank = value & 0x01; break;
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case 0x40C0:
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_workRamEnable2 = value & 0x01;
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_chrRamBank = (value & 0x08) >> 3;
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UpdateState();
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break;
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case 0x40AD: _mirroringSelect = value & 0x80 ? MirroringType::Horizontal : MirroringType::Vertical; UpdateState(); break;
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}
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} else {
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MMC1::WriteRegister(addr, value);
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}
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}
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uint8_t ReadRegister(uint16_t addr) override
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{
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if(addr < 0x5000) {
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switch(addr) {
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case 0x40B0: _kanjiRomPos = 0; break;
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case 0x40C0: return 0x80;
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default: break;
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}
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return _console->GetMemoryManager()->GetOpenBus();
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} else if(addr < 0x6000) {
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uint8_t value = _kanjiRomData[(_kanjiRomBank ? 0x20000 : 0) | ((addr & 0xFFF) << 5) | _kanjiRomPos];
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_kanjiRomPos = (_kanjiRomPos + 1) & 0x1F;
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return value;
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} else {
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return MMC1::ReadRegister(addr);
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}
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}
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void UpdateState() override
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{
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MMC1::UpdateState();
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SetMirroringType(_mirroringSelect);
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SetPpuMemoryMapping(0x0000, 0x1FFF, ChrMemoryType::ChrRam, _chrRamBank ? 0x2000 : 0, MemoryAccessType::ReadWrite);
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if(_workRamEnable1 && _workRamEnable2) {
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SetCpuMemoryMapping(0x6000, 0x7FFF, PrgMemoryType::WorkRam, 0, MemoryAccessType::ReadWrite);
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}
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}
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void Serialize(Serializer& s) override
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{
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MMC1::Serialize(s);
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SV(_mirroringSelect);
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SV(_kanjiRomPos);
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SV(_kanjiRomBank);
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SV(_chrRamBank);
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SV(_workRamEnable1);
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SV(_workRamEnable2);
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}
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}; |