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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol, Miodrag Milanovic
#ifndef MAME_BUS_ISA_MDA_H
#define MAME_BUS_ISA_MDA_H

#pragma once

#include "isa.h"
#include "machine/pc_lpt.h"
#include "video/mc6845.h"
#include "emupal.h"
#include "screen.h"

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

// ======================> isa8_mda_device

class isa8_mda_device : public device_t,
	public device_isa8_card_interface
{
public:
	friend class isa8_hercules_device;

	// construction/destruction
	isa8_mda_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual DECLARE_READ8_MEMBER(io_read);
	virtual DECLARE_WRITE8_MEMBER(io_write);
	virtual DECLARE_READ8_MEMBER(status_r);
	virtual DECLARE_WRITE8_MEMBER(mode_control_w);

	DECLARE_WRITE_LINE_MEMBER(hsync_changed);
	DECLARE_WRITE_LINE_MEMBER(vsync_changed);

	virtual MC6845_UPDATE_ROW( crtc_update_row );

protected:
	isa8_mda_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);

	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

	// optional information overrides
	virtual void device_add_mconfig(machine_config &config) override;
	virtual const tiny_rom_entry *device_rom_region() const override;

	required_device<mc6845_device> m_crtc;
	optional_device<pc_lpt_device> m_lpt;

private:
	WRITE_LINE_MEMBER(pc_cpu_line);

	MC6845_UPDATE_ROW( mda_text_inten_update_row );
	MC6845_UPDATE_ROW( mda_text_blink_update_row );

public:
	int m_framecnt;

	uint8_t   m_mode_control;

	int     m_update_row_type;
	uint8_t   *m_chr_gen;
	uint8_t   m_vsync;
	uint8_t   m_hsync;
	std::vector<uint8_t> m_videoram;
	uint8_t   m_pixel;
	required_device<palette_device> m_palette;
};


// device type definition
DECLARE_DEVICE_TYPE(ISA8_MDA, isa8_mda_device)

// ======================> isa8_hercules_device

class isa8_hercules_device :
		public isa8_mda_device
{
public:
	// construction/destruction
	isa8_hercules_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual DECLARE_READ8_MEMBER(io_read) override;
	virtual DECLARE_WRITE8_MEMBER(io_write) override;
	virtual DECLARE_READ8_MEMBER(status_r) override;
	virtual DECLARE_WRITE8_MEMBER(mode_control_w) override;

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

	// optional information overrides
	virtual void device_add_mconfig(machine_config &config) override;
	virtual const tiny_rom_entry *device_rom_region() const override;

private:
	virtual MC6845_UPDATE_ROW( crtc_update_row ) override;
	MC6845_UPDATE_ROW( hercules_gfx_update_row );

	uint8_t m_configuration_switch; //hercules
};


// device type definition
DECLARE_DEVICE_TYPE(ISA8_HERCULES, isa8_hercules_device)

// ======================> isa8_ec1840_0002_device

class isa8_ec1840_0002_device :
		public isa8_mda_device
{
public:
	// construction/destruction
	isa8_ec1840_0002_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

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

	// optional information overrides
	virtual void device_add_mconfig(machine_config &config) override;

private:
	virtual DECLARE_WRITE8_MEMBER(mode_control_w) override;

	virtual MC6845_UPDATE_ROW( crtc_update_row ) override;
	MC6845_UPDATE_ROW( mda_lowres_text_inten_update_row );
	MC6845_UPDATE_ROW( mda_lowres_text_blink_update_row );

	std::unique_ptr<uint8_t[]>   m_soft_chr_gen;
};

// device type definition
DECLARE_DEVICE_TYPE(ISA8_EC1840_0002, isa8_ec1840_0002_device)

// ======================> isa8_epc_mda_device

class isa8_epc_mda_device :
		public isa8_mda_device
{
public:
	// construction/destruction
	isa8_epc_mda_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual DECLARE_READ8_MEMBER(io_read) override;
	virtual DECLARE_WRITE8_MEMBER(io_write) override;

	/* Monitor */
	DECLARE_INPUT_CHANGED_MEMBER(monitor_changed);

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

	// optional information overrides
	virtual void device_add_mconfig(machine_config &config) override;
	virtual const tiny_rom_entry *device_rom_region() const override;
	virtual ioport_constructor device_input_ports() const override;

private:
	inline int get_xres();
	inline int get_yres();
	//virtual DECLARE_WRITE8_MEMBER(mode_control_w) override;

	enum {
		VM_COLS80 = 0x01,
		VM_GRAPH  = 0x02,
		VM_HOR640 = 0x04,
		VM_MONO   = 0x08,
		VM_VER400 = 0x10
	};

	enum {
		MR1_COLS80 = 0x01,
		MR1_GRAPH = 0x02,
		MR1_VIDEO = 0x08,
		MR1_HOR640 = 0x10,
		MR1_BLINK = 0x20
	};

	enum {
		MR2_COLEMU = 0x04,
		MR2_CHRSET = 0x40,
		MR2_VER400 = 0x80
	};

	enum {
		ATTR_BLINK = 0x80,
		ATTR_BACKG = 0x70,
		ATTR_INTEN = 0x08,
		ATTR_FOREG = 0x07,
		ATTR_ULINE = 0x01,
	};
	virtual MC6845_UPDATE_ROW( crtc_update_row ) override;
	//MC6845_UPDATE_ROW( mda_lowres_text_inten_update_row );
	//MC6845_UPDATE_ROW( mda_lowres_text_blink_update_row );

	std::unique_ptr<uint8_t[]>   m_soft_chr_gen;
	required_ioport m_s1;
	uint8_t m_color_mode;
	uint8_t m_mode_control2;
	required_device<screen_device> m_screen;
	required_ioport m_io_monitor;
	required_region_ptr<uint8_t> m_chargen;

	uint8_t m_vmode;
	rgb_t (*m_pal)[4];
	rgb_t m_3111_pal[4];
	rgb_t m_371x_pal[4];
	bool m_installed;
	hd6845s_device *m_hd6845s;
};

// device type definition
DECLARE_DEVICE_TYPE(ISA8_EPC_MDA, isa8_epc_mda_device)

#endif // MAME_BUS_ISA_MDA_H