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#pragma once

#ifndef __PX8__
#define __PX8__


#include "emu.h"
#include "cpu/z80/z80.h"
#include "cpu/m6800/m6800.h"
#include "imagedev/cartslot.h"
#include "imagedev/cassette.h"
#include "machine/ram.h"
#include "machine/i8251.h"
#include "machine/pf10.h"
#include "sound/wave.h"

#define UPD70008_TAG	"4a"
#define UPD7508_TAG		"2e"
#define HD6303_TAG		"13d"
#define SED1320_TAG		"7c"
#define I8251_TAG		"13e"
#define UPD7001_TAG		"1d"
#define SCREEN_TAG		"screen"

#define PX8_VIDEORAM_MASK	0x17ff

class px8_state : public driver_device
{
public:
	px8_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		  m_maincpu(*this, UPD70008_TAG),
		  m_cassette(*this, CASSETTE_TAG),
		  m_ram(*this, RAM_TAG)
	,
		m_video_ram(*this, "video_ram"){ }

	required_device<cpu_device> m_maincpu;
	required_device<cassette_image_device> m_cassette;
	required_device<ram_device> m_ram;
	/* video state */
	required_shared_ptr<UINT8> m_video_ram; 		/* LCD video RAM */

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

	UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

	READ8_MEMBER( gah40m_r );
	WRITE8_MEMBER( gah40m_w );
	READ8_MEMBER( gah40s_r );
	WRITE8_MEMBER( gah40s_w );
	WRITE8_MEMBER( gah40s_ier_w );
	READ8_MEMBER( krtn_0_3_r );
	READ8_MEMBER( krtn_4_7_r );
	WRITE8_MEMBER( ksc_w );

	void bankswitch();
	UINT8 krtn_read();

	/* GAH40M state */
	UINT16 m_icr;				/* input capture register */
	UINT16 m_frc;				/* free running counter */
	UINT8 m_ier;				/* interrupt acknowledge register */
	UINT8 m_isr;				/* interrupt status register */
	UINT8 m_sio;				/* serial I/O register */
	int m_bank0;				/* */

	/* GAH40S state */
	UINT16 m_cnt;				/* microcassette tape counter */
	int m_swpr;				/* P-ROM power switch */
	UINT16 m_pra;				/* P-ROM address */
	UINT8 m_prd;				/* P-ROM data */

	/* memory state */
	int m_bk2;				/* */

	/* keyboard state */
	int m_ksc;				/* keyboard scan column */
};

#endif