// $Id: DriveMultiplexer.hh 5733 2006-10-02 13:16:39Z m9710797 $

#ifndef DRIVEMULTIPLEXER_HH
#define DRIVEMULTIPLEXER_HH

#include "DiskDrive.hh"
#include "noncopyable.hh"

namespace openmsx {

/**
 * This class connects to a FDC as a normal DiskDrive and deligates all
 * requests to one of four other DiskDrives.
 */
class DriveMultiplexer : public DiskDrive, private noncopyable
{
public:
	enum DriveNum {
		DRIVE_A = 0,
		DRIVE_B = 1,
		DRIVE_C = 2,
		DRIVE_D = 3,
		NO_DRIVE = 4
	};

	// Multiplexer interface
	explicit DriveMultiplexer(DiskDrive* drive[4]);
	virtual ~DriveMultiplexer();
	void selectDrive(DriveNum num, const EmuTime& time);

	// DiskDrive interface
	virtual bool ready();
	virtual bool writeProtected();
	virtual bool doubleSided();
	virtual void setSide(bool side);
	virtual void step(bool direction, const EmuTime& time);
	virtual bool track00(const EmuTime& time);
	virtual void setMotor(bool status, const EmuTime& time);
	virtual bool indexPulse(const EmuTime& time);
	virtual int indexPulseCount(const EmuTime& begin,
	                            const EmuTime& end);
	virtual EmuTime getTimeTillSector(byte sector, const EmuTime& time);
	virtual EmuTime getTimeTillIndexPulse(const EmuTime& time);
	virtual void setHeadLoaded(bool status, const EmuTime& time);
	virtual bool headLoaded(const EmuTime& time);
	virtual void read (byte sector, byte* buf,
	                   byte& onDiskTrack, byte& onDiskSector,
	                   byte& onDiskSide,  int&  onDiskSize);
	virtual void write(byte sector, const byte* buf,
	                   byte& onDiskTrack, byte& onDiskSector,
	                   byte& onDiskSide,  int&  onDiskSize);
	virtual void getSectorHeader(byte sector, byte* buf);
	virtual void getTrackHeader(byte* buf);
	virtual void initWriteTrack();
	virtual void writeTrackData(byte data);
	virtual bool diskChanged();
	virtual bool peekDiskChanged() const;
	virtual bool dummyDrive();

private:
	DiskDrive* drive[5];
	DriveNum selected;
	bool motor;
	bool side;
};

} // namespace openmsx

#endif