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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Acorn 40 Column VDU Interface
http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Acorn_VDU.html
**********************************************************************/
#ifndef MAME_BUS_ACORN_SYSTEM_VDU40_H
#define MAME_BUS_ACORN_SYSTEM_VDU40_H
#pragma once
#include "bus/acorn/bus.h"
#include "video/saa5050.h"
#include "video/mc6845.h"
#include "emupal.h"
#include "screen.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class acorn_vdu40_device :
public device_t,
public device_acorn_bus_interface
{
public:
// construction/destruction
acorn_vdu40_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &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:
MC6845_UPDATE_ROW(crtc_update_row);
DECLARE_WRITE_LINE_MEMBER(vsync_changed);
required_device<screen_device> m_screen;
required_device<mc6845_device> m_crtc;
required_device<saa5050_device> m_trom;
std::unique_ptr<uint8_t[]> m_videoram;
};
// device type definition
DECLARE_DEVICE_TYPE(ACORN_VDU40, acorn_vdu40_device)
#endif // MAME_BUS_ACORN_SYSTEM_VDU40_H
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