PanasonicMemory.hh

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#ifndef PANASONICMEMORY_HH
#define PANASONICMEMORY_HH
 
#include "Rom.hh"
#include "openmsx.hh"
#include <optional>
 
namespace openmsx {
 
class MSXMotherBoard;
class MSXCPU;
class Ram;
 
class PanasonicMemory
{
public:
        explicit PanasonicMemory(MSXMotherBoard& motherBoard);
 
        void registerRam(Ram& ram);
        [[nodiscard]] std::span<const byte, 0x2000> getRomBlock(unsigned block) const;
        [[nodiscard]] std::span<const byte> getRomRange(unsigned first, unsigned last) const;
        [[nodiscard]] byte* getRamBlock(unsigned block);
        [[nodiscard]] unsigned getRamSize() const { return ramSize; }
        void setDRAM(bool dram);
        [[nodiscard]] bool isWritable(unsigned address) const;
 
private:
        MSXCPU& msxcpu;
 
        const std::optional<Rom> rom; // can be nullptr
        byte* ram = nullptr;
        unsigned ramSize = 0;
        bool dram = false;
};
 
} // namespace openmsx
 
#endif