/*

 * This class implements the

 *   backup RAM

 *   bitmap function

 * of the S1985 MSX-engine

 *

 *  TODO explanation

 */

#ifndef S1985_HH

#define S1985_HH

#include "MSXDevice.hh"

#include "MSXSwitchedDevice.hh"

#include <memory>

namespace openmsx {

using uint4_t = uint8_t;

class SRAM;

class MSXS1985 final : public MSXDevice, public MSXSwitchedDevice

{

public:

	explicit MSXS1985(const DeviceConfig& config);

	~MSXS1985() override;

	// MSXDevice

	void reset(EmuTime time) override;

	// MSXSwitchedDevice

	[[nodiscard]] uint8_t readSwitchedIO(uint16_t port, EmuTime time) override;

	[[nodiscard]] uint8_t peekSwitchedIO(uint16_t port, EmuTime time) const override;

	void writeSwitchedIO(uint16_t port, uint8_t value, EmuTime time) override;

	template<typename Archive>

	void serialize(Archive& ar, unsigned version);

private:

	std::unique_ptr<SRAM> sram;

	uint4_t address;

	uint8_t color1;

	uint8_t color2;

	uint8_t pattern;

};

SERIALIZE_CLASS_VERSION(MSXS1985, 2);

} // namespace openmsx

#endif