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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/*********************************************************************

    a2videoterm.h

    Implementation of the Apple II Memory Expansion Card

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

#ifndef MAME_BUS_A2BUS_A2VIDEOTERM_H
#define MAME_BUS_A2BUS_A2VIDEOTERM_H

#pragma once

#include "a2bus.h"
#include "video/mc6845.h"
#include "emupal.h"

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

class a2bus_videx80_device:
	public device_t,
	public device_a2bus_card_interface
{
protected:
	// construction/destruction
	a2bus_videx80_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);

	virtual void device_start() override;
	virtual void device_reset() override;
	virtual void device_add_mconfig(machine_config &config) override;

	// overrides of standard a2bus slot functions
	virtual uint8_t read_c0nx(uint8_t offset) override;
	virtual void write_c0nx(uint8_t offset, uint8_t data) override;
	virtual uint8_t read_cnxx(uint8_t offset) override;
	virtual void write_cnxx(uint8_t offset, uint8_t data) override;
	virtual uint8_t read_c800(uint16_t offset) override;
	virtual void write_c800(uint16_t offset, uint8_t data) override;

	uint8_t *m_rom, *m_chrrom;
	uint8_t m_ram[512*4];
	int m_framecnt;

	required_device<mc6845_device> m_crtc;
	required_device<palette_device> m_palette;

private:
	DECLARE_WRITE_LINE_MEMBER(vsync_changed);
	MC6845_UPDATE_ROW(crtc_update_row);

	int m_rambank;
};

class a2bus_videoterm_device : public a2bus_videx80_device
{
public:
	a2bus_videoterm_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual const tiny_rom_entry *device_rom_region() const override;
};

class a2bus_ap16_device : public a2bus_videx80_device
{
public:
	a2bus_ap16_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual const tiny_rom_entry *device_rom_region() const override;

protected:
	virtual uint8_t read_cnxx(uint8_t offset) override;
};


class a2bus_ap16alt_device : public a2bus_videx80_device
{
public:
	a2bus_ap16alt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual const tiny_rom_entry *device_rom_region() const override;

protected:
	virtual uint8_t read_cnxx(uint8_t offset) override;
};

class a2bus_vtc1_device : public a2bus_videx80_device
{
public:
	a2bus_vtc1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual const tiny_rom_entry *device_rom_region() const override;
};

class a2bus_vtc2_device : public a2bus_videx80_device
{
public:
	a2bus_vtc2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual const tiny_rom_entry *device_rom_region() const override;
};

class a2bus_aevm80_device : public a2bus_videx80_device
{
public:
	a2bus_aevm80_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	virtual const tiny_rom_entry *device_rom_region() const override;
};

// device type definition
DECLARE_DEVICE_TYPE(A2BUS_VIDEOTERM,      a2bus_videoterm_device)
DECLARE_DEVICE_TYPE(A2BUS_IBSAP16,        a2bus_ap16_device)
DECLARE_DEVICE_TYPE(A2BUS_IBSAP16ALT,     a2bus_ap16alt_device)
DECLARE_DEVICE_TYPE(A2BUS_VTC1,           a2bus_vtc1_device)
DECLARE_DEVICE_TYPE(A2BUS_VTC2,           a2bus_vtc2_device)
DECLARE_DEVICE_TYPE(A2BUS_AEVIEWMASTER80, a2bus_aevm80_device)

#endif // MAME_BUS_A2BUS_A2VIDEOTERM_H