mame/src/mess/machine/c1571.h

/**********************************************************************

    Commodore 1570/1571/1571CR Single Disk Drive emulation

    Copyright MESS Team.
    Visit http://mamedev.org for licensing and usage restrictions.

**********************************************************************/

#pragma once

#ifndef __C1571__
#define __C1571__


#include "emu.h"
#include "cpu/m6502/m6502.h"
#include "imagedev/flopdrv.h"
#include "formats/d64_dsk.h"
#include "formats/g64_dsk.h"
#include "machine/64h156.h"
#include "machine/6522via.h"
#include "machine/c64_bn1541.h"
#include "machine/cbmiec.h"
#include "machine/mos6526.h"
#include "machine/wd17xx.h"



//**************************************************************************
//  MACROS / CONSTANTS
//**************************************************************************

#define C1571_TAG			"c1571"



//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> c1571_device

class base_c1571_device :  public device_t,
						   public device_cbm_iec_interface,
						   public device_c64_floppy_parallel_interface
{
public:
	enum
	{
		TYPE_1570,
		TYPE_1571,
		TYPE_1571CR,
		TYPE_MINI_CHIEF
	};

    // construction/destruction
    base_c1571_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant);

	// optional information overrides
	virtual const rom_entry *device_rom_region() const;
	virtual machine_config_constructor device_mconfig_additions() const;

	// not really public
	static void on_disk_change(device_image_interface &image);

	DECLARE_WRITE_LINE_MEMBER( via0_irq_w );
	DECLARE_READ8_MEMBER( via0_pa_r );
	DECLARE_WRITE8_MEMBER( via0_pa_w );
	DECLARE_READ8_MEMBER( via0_pb_r );
	DECLARE_WRITE8_MEMBER( via0_pb_w );
	DECLARE_READ_LINE_MEMBER( atn_in_r );
	DECLARE_READ_LINE_MEMBER( wprt_r );
	DECLARE_WRITE_LINE_MEMBER( via1_irq_w );
	DECLARE_READ8_MEMBER( via1_pb_r );
	DECLARE_WRITE8_MEMBER( via1_pb_w );
	DECLARE_WRITE_LINE_MEMBER( cia_irq_w );
	DECLARE_WRITE_LINE_MEMBER( cia_pc_w );
	DECLARE_WRITE_LINE_MEMBER( cia_cnt_w );
	DECLARE_WRITE_LINE_MEMBER( cia_sp_w );
	DECLARE_READ8_MEMBER( cia_pb_r );
	DECLARE_WRITE8_MEMBER( cia_pb_w );
	DECLARE_WRITE_LINE_MEMBER( atn_w );
	DECLARE_WRITE_LINE_MEMBER( byte_w );
	DECLARE_WRITE_LINE_MEMBER( wpt_w );

protected:
    // device-level overrides
	virtual void device_config_complete();
    virtual void device_start();
	virtual void device_reset();

	// device_cbm_iec_interface overrides
	virtual void cbm_iec_srq(int state);
	virtual void cbm_iec_atn(int state);
	virtual void cbm_iec_data(int state);
	virtual void cbm_iec_reset(int state);

	// device_c64_floppy_parallel_interface overrides
	virtual void parallel_data_w(UINT8 data);
	virtual void parallel_strobe_w(int state);

	inline void set_iec_data();
	inline void set_iec_srq();

	required_device<cpu_device> m_maincpu;
	required_device<via6522_device> m_via0;
	required_device<via6522_device> m_via1;
	required_device<mos6526_device> m_cia;
	required_device<wd1770_device> m_fdc;
	required_device<c64h156_device> m_ga;
	required_device<legacy_floppy_image_device> m_image;

	// signals
	int m_1_2mhz;							// clock speed

	// IEC bus
	int m_data_out;							// serial data out
	int m_ser_dir;							// fast serial direction
	int m_sp_out;							// fast serial data out
	int m_cnt_out;							// fast serial clock out

	// interrupts
	int m_via0_irq;							// VIA #0 interrupt request
	int m_via1_irq;							// VIA #1 interrupt request
	int m_cia_irq;							// CIA interrupt request

	int m_variant;
};


// ======================> c1570_device

class c1570_device :  public base_c1571_device
{
public:
    // construction/destruction
    c1570_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};


// ======================> c1571_device

class c1571_device :  public base_c1571_device
{
public:
    // construction/destruction
    c1571_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};


// ======================> c1571cr_device

class c1571cr_device :  public base_c1571_device
{
public:
    // construction/destruction
    c1571cr_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};


// ======================> mini_chief_device

class mini_chief_device :  public base_c1571_device
{
public:
    // construction/destruction
    mini_chief_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
};


// device type definition
extern const device_type C1570;
extern const device_type C1571;
extern const device_type C1571CR;
extern const device_type MINI_CHIEF;



#endif