Lib65816/include/CpuStatus.hpp
2018-03-04 21:04:25 +01:00

93 lines
2.7 KiB
C++

/*
* This file is part of the 65816 Emulator Library.
* Copyright (c) 2018 Francesco Rigoni.
*
* https://github.com/FrancescoRigoni/Lib65816
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CPUSTATUS_H
#define CPUSTATUS_H
#include <stdint.h>
class CpuStatus {
public:
CpuStatus();
void setZeroFlag();
void clearZeroFlag();
bool zeroFlag();
void setSignFlag();
void clearSignFlag();
bool signFlag();
void setDecimalFlag();
void clearDecimalFlag();
bool decimalFlag();
void setInterruptDisableFlag();
void clearInterruptDisableFlag();
bool interruptDisableFlag();
void setAccumulatorWidthFlag();
void clearAccumulatorWidthFlag();
bool accumulatorWidthFlag();
void setIndexWidthFlag();
void clearIndexWidthFlag();
bool indexWidthFlag();
void setCarryFlag();
void clearCarryFlag();
bool carryFlag();
void setBreakFlag();
void clearBreakFlag();
bool breakFlag();
void setOverflowFlag();
void clearOverflowFlag();
bool overflowFlag();
void setEmulationFlag();
void clearEmulationFlag();
bool emulationFlag();
uint8_t getRegisterValue();
void setRegisterValue(uint8_t);
void updateZeroFlagFrom8BitValue(uint8_t);
void updateZeroFlagFrom16BitValue(uint16_t);
void updateSignFlagFrom8BitValue(uint8_t);
void updateSignFlagFrom16BitValue(uint16_t);
void updateSignAndZeroFlagFrom8BitValue(uint8_t);
void updateSignAndZeroFlagFrom16BitValue(uint16_t);
private:
bool mZeroFlag = false;
bool mSignFlag = false;
bool mDecimalFlag = false;
bool mInterruptDisableFlag = false;
bool mAccumulatorWidthFlag = false;
bool mIndexWidthFlag = false;
bool mCarryFlag = false;
bool mEmulationFlag = true; // CPU Starts in emulation mode
bool mOverflowFlag = false;
bool mBreakFlag = false;
};
#endif // CPUSTATUS_H