openMSX/src/SVIPPI.hh

// This class implements the mapping of the PPI (8255) into the SVI machine.

#ifndef SVIPPI_HH
#define SVIPPI_HH

#include "MSXDevice.hh"
#include "I8255Interface.hh"
#include "I8255.hh"
#include "Keyboard.hh"
#include "KeyClick.hh"

namespace openmsx {

class CassettePortInterface;
class JoystickPortIf;

class SVIPPI final : public MSXDevice, public I8255Interface
{
public:
	SVIPPI(const DeviceConfig& config);

	void reset(EmuTime::param time) override;
	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;

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

private:
	// I8255Interface
	byte readA(EmuTime::param time) override;
	byte readB(EmuTime::param time) override;
	nibble readC0(EmuTime::param time) override;
	nibble readC1(EmuTime::param time) override;
	byte peekA(EmuTime::param time) const override;
	byte peekB(EmuTime::param time) const override;
	nibble peekC0(EmuTime::param time) const override;
	nibble peekC1(EmuTime::param time) const override;
	void writeA(byte value, EmuTime::param time) override;
	void writeB(byte value, EmuTime::param time) override;
	void writeC0(nibble value, EmuTime::param time) override;
	void writeC1(nibble value, EmuTime::param time) override;

	CassettePortInterface& cassettePort;
	I8255 i8255;
	KeyClick click;
	Keyboard keyboard;
	JoystickPortIf* ports[2];
	nibble prevBits;
	nibble selectedRow;
};

} // namespace openmsx

#endif