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// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/***************************************************************************

        Psion Organiser II series

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

#pragma once

#ifndef _PSION_H_
#define _PSION_H_

#include "cpu/m6800/m6800.h"
#include "machine/nvram.h"
#include "machine/psion_pack.h"
#include "video/hd44780.h"
#include "sound/beep.h"


// ======================> psion_state

class psion_state : public driver_device
{
public:
	psion_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
			m_maincpu(*this, "maincpu"),
			m_lcdc(*this, "hd44780"),
			m_beep(*this, "beeper"),
			m_pack1(*this, "pack1"),
			m_pack2(*this, "pack2"),
			m_nvram1(*this, "nvram1"),
			m_nvram2(*this, "nvram2"),
			m_nvram3(*this, "nvram3"),
			m_sys_register(*this, "sys_register"),
			m_stby_pwr(1),
			m_ram(*this, "ram"){ }

	required_device<hd63701_cpu_device> m_maincpu;
	required_device<hd44780_device> m_lcdc;
	required_device<beep_device> m_beep;
	required_device<datapack_device> m_pack1;
	required_device<datapack_device> m_pack2;
	required_device<nvram_device> m_nvram1;
	required_device<nvram_device> m_nvram2;
	optional_device<nvram_device> m_nvram3;

	UINT16 m_kb_counter;
	UINT8 m_enable_nmi;
	optional_shared_ptr<UINT8> m_sys_register;
	UINT8 m_tcsr_value;
	UINT8 m_stby_pwr;
	UINT8 m_pulse;

	UINT8 m_port2_ddr;  // datapack i/o ddr
	UINT8 m_port2;      // datapack i/o data bus
	UINT8 m_port6_ddr;  // datapack control lines ddr
	UINT8 m_port6;      // datapack control lines

	// RAM/ROM banks
	required_shared_ptr<UINT8> m_ram;
	std::unique_ptr<UINT8[]> m_paged_ram;
	UINT8 m_rom_bank;
	UINT8 m_ram_bank;
	UINT8 m_ram_bank_count;
	UINT8 m_rom_bank_count;

	virtual void machine_start() override;
	virtual void machine_reset() override;
	void nvram_init(nvram_device &nvram, void *data, size_t size);

	UINT8 kb_read();
	void update_banks();
	DECLARE_WRITE8_MEMBER( hd63701_int_reg_w );
	DECLARE_READ8_MEMBER( hd63701_int_reg_r );
	void io_rw(address_space &space, UINT16 offset);
	DECLARE_WRITE8_MEMBER( io_w );
	DECLARE_READ8_MEMBER( io_r );
	DECLARE_PALETTE_INIT(psion);
	DECLARE_INPUT_CHANGED_MEMBER(psion_on);
	TIMER_DEVICE_CALLBACK_MEMBER(nmi_timer);

	HD44780_PIXEL_UPDATE(lz_pixel_update);
};


class psion1_state : public psion_state
{
public:
	psion1_state(const machine_config &mconfig, device_type type, const char *tag)
		: psion_state(mconfig, type, tag)
		{ }

	virtual void machine_reset() override;

	DECLARE_READ8_MEMBER( reset_kb_counter_r );
	DECLARE_READ8_MEMBER( inc_kb_counter_r );
	DECLARE_READ8_MEMBER( switchoff_r );

	HD44780_PIXEL_UPDATE(psion1_pixel_update);
};

#endif  // _PSION_H_