c64.h

/*
 * This file is part of libsidplayfp, a SID player engine.
 *
 * Copyright 2011-2014 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"
 
#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif
 
class c64sid;
class sidmemory;
 
 
#ifdef PC64_TESTSUITE
class testEnv
{
public:
    virtual ~testEnv() {}
    virtual void load(const char *) =0;
};
#endif
 
class c64: private c64env
{
public:
    typedef enum
    {
        PAL_B = 0     
        ,NTSC_M       
        ,OLD_NTSC_M   
        ,PAL_N        
    } model_t;
 
private:
    typedef std::map<int, ExtraSidBank*> sidBankMap_t;
 
    class resetSID
    {
    public:
        void operator() (sidBankMap_t::value_type &e) { e.second->reset(); }
    };
 
private:
    double m_cpuFreq;
 
    int irqCount;
 
    bool oldBAState;
 
    EventScheduler m_scheduler;
 
    c64cpu cpu;
 
    c64cia1 cia1;
 
    c64cia2 cia2;
 
    c64vic vic;
 
    ColorRAMBank colorRAMBank;
 
    SidBank sidBank;
 
    sidBankMap_t extraSidBanks;
 
    DisconnectedBusBank disconnectedBusBank;
 
    IOBank ioBank;
 
    MMU mmu;
 
private:
    static double getCpuFreq(model_t model);
 
private:
    uint8_t cpuRead(uint_least16_t addr) { return mmu.cpuRead(addr); }
 
    void cpuWrite(uint_least16_t addr, uint8_t data) { mmu.cpuWrite(addr, data); }
 
    inline void interruptIRQ(bool state);
 
    inline void interruptNMI() { cpu.triggerNMI (); }
 
    inline void interruptRST() { cpu.triggerRST (); }
 
    inline void setBA(bool state);
 
    inline void lightpen(bool state);
 
#ifdef PC64_TESTSUITE
    testEnv *m_env;
 
    void loadFile(const char *file)
    {
        m_env->load(file);
    }
#endif
 
    void resetIoBank();
 
public:
    c64();
    ~c64() {}
 
#ifdef PC64_TESTSUITE
    void setTestEnv(testEnv *env)
    {
        m_env = env;
    }
#endif
 
    EventScheduler *getEventScheduler() { return &m_scheduler; }
    const EventScheduler &getEventScheduler() const { return m_scheduler; }
 
    void debug(bool enable, FILE *out) { cpu.debug(enable, out); }
 
    void reset();
    void resetCpu() { cpu.reset(); }
 
    void setModel(model_t model);
 
    void setRoms(const uint8_t* kernal, const uint8_t* basic, const uint8_t* character)
    {
        mmu.setRoms(kernal, basic, character);
    }
 
    double getMainCpuSpeed() const { return m_cpuFreq; }
 
    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(); }
};
 
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