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#ifndef __BW2__
#define __BW2__


#include "emu.h"
#include "cpu/z80/z80.h"
#include "imagedev/flopdrv.h"
#include "formats/basicdsk.h"
#include "machine/i8255.h"
#include "machine/ctronics.h"
#include "machine/i8251.h"
#include "machine/pit8253.h"
#include "machine/ram.h"
#include "machine/wd17xx.h"
#include "video/msm6255.h"
#include "rendlay.h"


#define SCREEN_TAG		"screen"
#define Z80_TAG			"ic1"
#define I8255A_TAG		"ic4"
#define WD2797_TAG		"ic5"
#define PIT8253_TAG		"ic6"
#define I8251_TAG		"ic7"
#define MSM6255_TAG		"ic49"
#define CENTRONICS_TAG	"centronics"

#define BW2_VIDEORAM_SIZE	0x4000
#define BW2_RAMCARD_SIZE	0x80000

enum {
	BANK_RAM1 = 0,
	BANK_VRAM,
	BANK_RAM2, BANK_RAMCARD_ROM = BANK_RAM2,
	BANK_RAM3,
	BANK_RAM4,
	BANK_RAM5, BANK_RAMCARD_RAM = BANK_RAM5,
	BANK_RAM6,
	BANK_ROM
};

class bw2_state : public driver_device
{
public:
	bw2_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		  m_maincpu(*this, Z80_TAG),
		  m_uart(*this, I8251_TAG),
		  m_fdc(*this, WD2797_TAG),
		  m_lcdc(*this, MSM6255_TAG),
		  m_centronics(*this, CENTRONICS_TAG),
		  m_ram(*this, RAM_TAG),
		  m_floppy0(*this, FLOPPY_0),
		  m_floppy1(*this, FLOPPY_1)
	{ }

	required_device<cpu_device> m_maincpu;
	required_device<i8251_device> m_uart;
	required_device<device_t> m_fdc;
	required_device<msm6255_device> m_lcdc;
	required_device<centronics_device> m_centronics;
	required_device<ram_device> m_ram;
	required_device<device_t> m_floppy0;
	required_device<device_t> m_floppy1;

	virtual void machine_start();
	virtual void machine_reset();

	int get_ramdisk_size();
	void bankswitch(UINT8 data);
	void ramcard_bankswitch(UINT8 data);

	DECLARE_WRITE8_MEMBER( ramcard_bank_w );
	DECLARE_WRITE8_MEMBER( ppi_pa_w );
	DECLARE_READ8_MEMBER( ppi_pb_r );
	DECLARE_WRITE8_MEMBER( ppi_pc_w );
	DECLARE_READ8_MEMBER( ppi_pc_r );
	DECLARE_WRITE_LINE_MEMBER( pit_out0_w );
	DECLARE_WRITE_LINE_MEMBER( mtron_w );
	DECLARE_WRITE_LINE_MEMBER( fdc_drq_w );

	// keyboard state
	UINT8 m_kb_row;

	// memory state
	UINT8 *m_ramcard_ram;
	UINT8 m_bank;

	// floppy state
	int m_drive;
	int m_mtron;
	int m_mfdbk;

	// video state
	UINT8 *m_video_ram;
};

#endif