/*

 * This class implements the 2 Turbo-R specific LEDS:

 *

 * Bit 0 of IO-port 0xA7 turns the PAUSE led ON (1) or OFF (0)

 * Bit 7                           TURBO

 * TODO merge doc below

 */

#ifndef TURBORPAUSE_HH

#define TURBORPAUSE_HH

#include "BooleanSetting.hh"

#include "MSXDevice.hh"

#include "Observer.hh"

namespace openmsx {

/**

 * This class implements the MSX Turbo-R pause key

 *

 *  Whenever the pause key is pressed a flip-flop is toggled.

 *  The status of this flip-flop can be read from io-port 0xA7.

 *   bit 0 indicates the status (1 = pause active)

 *   all other bits read 0

 */

class MSXTurboRPause final : public MSXDevice, private Observer<Setting>

{

public:

	explicit MSXTurboRPause(const DeviceConfig& config);

	~MSXTurboRPause() override;

	void reset(EmuTime time) override;

	void powerDown(EmuTime time) override;

	[[nodiscard]] byte readIO(uint16_t port, EmuTime time) override;

	[[nodiscard]] byte peekIO(uint16_t port, EmuTime time) const override;

	void writeIO(uint16_t port, byte value, EmuTime time) override;

	template<typename Archive>

	void serialize(Archive& ar, unsigned version);

private:

	// Observer<Setting>

	void update(const Setting& setting) noexcept override;

	void updatePause();

private:

	BooleanSetting pauseSetting;

	byte status = 255;

	bool pauseLed = false;

	bool turboLed = false;

	bool hwPause = false;

};

} // namespace openmsx

#endif