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112 lines
2.4 KiB
C++
112 lines
2.4 KiB
C++
#pragma once
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#include "stdafx.h"
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#include <assert.h>
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#include "BaseMapper.h"
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#include "CPU.h"
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#include "EmulationSettings.h"
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#include "FdsLoader.h"
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#include "Console.h"
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class FdsAudio;
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class FDS : public BaseMapper
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{
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private:
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static const uint32_t NoDiskInserted = 0xFF;
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static const uint32_t DiskInsertDelay = 3600000; //approx 2 sec delay
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static FDS* Instance;
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unique_ptr<FdsAudio> _audio;
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//Write registers
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uint16_t _irqReloadValue = 0;
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uint16_t _irqCounter = 0;
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bool _irqEnabled = false;
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bool _irqReloadEnabled = false;
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bool _diskRegEnabled = true;
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bool _soundRegEnabled = true;
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uint8_t _writeDataReg = 0;
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bool _motorOn = false;
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bool _resetTransfer = false;
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bool _readMode = false;
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bool _crcControl = false;
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bool _diskReady = false;
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bool _diskIrqEnabled = false;
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uint8_t _extConWriteReg = 0;
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//Read registers
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bool _badCrc = false;
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bool _endOfHead = false;
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bool _readWriteEnabled = false;
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uint8_t _readDataReg = 0;
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bool _diskWriteProtected = false;
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//Internal values
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uint32_t _diskNumber = 0;
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uint32_t _newDiskNumber = 0;
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uint32_t _newDiskInsertDelay = 0;
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uint32_t _diskPosition = 0;
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uint32_t _delay = 0;
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uint16_t _crcAccumulator;
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bool _previousCrcControlFlag = false;
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bool _gapEnded = true;
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bool _scanningDisk = false;
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bool _needIrq = false;
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bool _transferComplete = false;
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bool _isDirty = false;
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vector<uint8_t> _fdsRawData;
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vector<vector<uint8_t>> _fdsDiskSides;
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string _romFilepath;
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uint8_t _gameStarted = 0;
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uint32_t _previousSpeed = 0;
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bool _fastForwarding = false;
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protected:
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virtual uint16_t GetPRGPageSize() { return 0x2000; }
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virtual uint16_t GetCHRPageSize() { return 0x2000; }
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virtual uint32_t GetWorkRamPageSize() { return 0x8000; }
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virtual uint32_t GetWorkRamSize() { return 0x8000; }
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uint16_t RegisterStartAddress() { return 0x4020; }
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uint16_t RegisterEndAddress() { return 0x4092; }
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bool AllowRegisterRead() { return true; }
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void InitMapper();
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void InitMapper(RomData &romData);
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uint32_t GetFdsDiskSideSize(uint8_t side);
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uint8_t ReadFdsDisk();
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void WriteFdsDisk(uint8_t value);
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void ClockIrq();
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void ProcessCpuClock();
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void UpdateCrc(uint8_t value);
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bool IsDiskInserted();
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void WriteRegister(uint16_t addr, uint8_t value);
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uint8_t ReadRegister(uint16_t addr);
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uint8_t ReadRAM(uint16_t addr);
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void StreamState(bool saving);
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public:
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FDS();
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~FDS();
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static uint32_t GetSideCount();
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static void InsertDisk(uint32_t diskNumber);
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static void SwitchDiskSide();
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static void EjectDisk();
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}; |