c64.h

/*
 * This file is part of libsidplayfp, a SID player engine.
 *
 * Copyright 2011-2023 Leandro Nini <drfiemost@users.sourceforge.net>
 * Copyright 2007-2010 Antti Lankila
 * Copyright 2000 Simon White
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
 
#ifndef C64_H
#define C64_H
 
#include <stdint.h>
#include <cstdio>
 
#include <map>
 
#include "Banks/IOBank.h"
#include "Banks/ColorRAMBank.h"
#include "Banks/DisconnectedBusBank.h"
#include "Banks/SidBank.h"
#include "Banks/ExtraSidBank.h"
 
#include "EventScheduler.h"
 
#include "c64/c64env.h"
#include "c64/c64cpu.h"
#include "c64/c64cia.h"
#include "c64/c64vic.h"
#include "c64/mmu.h"
 
#include "sidcxx11.h"
 
#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif
 
namespace libsidplayfp
{
 
class c64sid;
class sidmemory;
 
class c64 final : private c64env
{
public:
    using model_t = enum
    {
        PAL_B = 0     
        ,NTSC_M       
        ,OLD_NTSC_M   
        ,PAL_N        
        ,PAL_M        
    };
 
    using cia_model_t = enum
    {
        OLD = 0     
        ,NEW        
        ,OLD_4485   
    };
 
private:
    using sidBankMap_t = std::map<int, ExtraSidBank*>;
 
private:
    double cpuFrequency;
 
    int irqCount;
 
    bool oldBAState;
 
    EventScheduler eventScheduler;
 
    c64cia1 cia1;
 
    c64cia2 cia2;
 
    c64vic vic;
 
    ColorRAMBank colorRAMBank;
 
    SidBank sidBank;
 
    sidBankMap_t extraSidBanks;
 
    DisconnectedBusBank disconnectedBusBank;
 
    IOBank ioBank;
 
    MMU mmu;
 
    c64cpubus cpubus;
 
    MOS6510 cpu;
 
private:
    static double getCpuFreq(model_t model);
 
    static void deleteSids(sidBankMap_t &extraSidBanks);
 
private:
    inline void interruptIRQ(bool state) override;
 
    inline void interruptNMI() override { cpu.triggerNMI(); }
 
    inline void interruptRST() override { cpu.triggerRST(); }
 
    inline void setBA(bool state) override;
 
    inline void lightpen(bool state) override;
 
    void resetIoBank();
 
public:
    c64();
    ~c64();
 
    EventScheduler *getEventScheduler() { return &eventScheduler; }
 
    uint_least32_t getTimeMs() const
    {
        return static_cast<uint_least32_t>((eventScheduler.getTime(EVENT_CLOCK_PHI1) * 1000) / cpuFrequency);
    }
 
    void clock() { eventScheduler.clock(); }
 
    void debug(bool enable, FILE *out) { cpu.debug(enable, out); }
 
    void reset();
    void resetCpu() { cpu.reset(); }
 
    void setModel(model_t model);
 
    void setCiaModel(cia_model_t model);
 
    double getMainCpuSpeed() const { return cpuFrequency; }
 
    void setBaseSid(c64sid *s);
 
    bool addExtraSid(c64sid *s, int address);
 
    void clearSids();
 
    const char* cpuCredits() const { return cpu.credits(); }
    const char* ciaCredits() const { return cia1.credits(); }
    const char* vicCredits() const { return vic.credits(); }
 
    sidmemory& getMemInterface() { return mmu; }
 
    uint_least16_t getCia1TimerA() const { return cia1.getTimerA(); }
 
    unsigned int installedSIDs() const;
};
 
void c64::interruptIRQ(bool state)
{
    if (state)
    {
        if (irqCount == 0)
            cpu.triggerIRQ();
 
        irqCount ++;
    }
    else
    {
        irqCount --;
        if (irqCount == 0)
             cpu.clearIRQ();
    }
}
 
void c64::setBA(bool state)
{
    // only react to changes in state
    if (state == oldBAState)
        return;
 
    oldBAState = state;
 
    // Signal changes in BA to interested parties
    cpu.setRDY(state);
}
 
void c64::lightpen(bool state)
{
    if (!state)
        vic.triggerLightpen();
    else
        vic.clearLightpen();
}
 
}
 
#endif // C64_H