MSXMapperIO.hh

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#ifndef MSXMAPPERIO_HH
#define MSXMAPPERIO_HH

#include "MSXDevice.hh"
#include "MSXMotherBoard.hh"
#include "SimpleDebuggable.hh"
#include <vector>

namespace openmsx {

struct MSXMemoryMapperInterface
{
        virtual byte readIO(word port, EmuTime::param time) = 0;
        virtual byte peekIO(word port, EmuTime::param time) const = 0;
        virtual void writeIO(word port, byte value, EmuTime::param time) = 0;
        virtual byte getSelectedSegment(byte page) const = 0;
protected:
        ~MSXMemoryMapperInterface() = default;
};


class MSXMapperIO final : public MSXDevice
{
public:
        explicit MSXMapperIO(const DeviceConfig& config);

        byte readIO(word port, EmuTime::param time) override;
        byte peekIO(word port, EmuTime::param time) const override;
        void writeIO(word port, byte value, EmuTime::param time) override;

        void registerMapper(MSXMemoryMapperInterface* mapper);
        void unregisterMapper(MSXMemoryMapperInterface* mapper);

        template<typename Archive>
        void serialize(Archive& ar, unsigned version);

private:
        struct Debuggable final : SimpleDebuggable {
                Debuggable(MSXMotherBoard& motherBoard, const std::string& name);
                byte read(unsigned address) override;
                void write(unsigned address, byte value, EmuTime::param time) override;
        } debuggable;

        std::vector<MSXMemoryMapperInterface*> mappers;

        byte mask;
};
SERIALIZE_CLASS_VERSION(MSXMapperIO, 2);


class MSXMapperIOClient : public MSXMemoryMapperInterface
{
protected:
        MSXMapperIOClient(MSXMotherBoard& motherBoard_)
                : motherBoard(motherBoard_)
        {
                auto& mapperIO = motherBoard.createMapperIO();
                mapperIO.registerMapper(this);
        }

        ~MSXMapperIOClient()
        {
                auto& mapperIO = motherBoard.getMapperIO();
                mapperIO.unregisterMapper(this);
                motherBoard.destroyMapperIO();
        }

private:
        MSXMotherBoard& motherBoard;
};

} // namespace openmsx

#endif