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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
JAFA Mode 7 Display Unit
**********************************************************************/
#ifndef MAME_BUS_ELECTRON_MODE7_H
#define MAME_BUS_ELECTRON_MODE7_H
#include "exp.h"
#include "video/mc6845.h"
#include "video/saa5050.h"
#include "screen.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class electron_mode7_device:
public device_t,
public device_electron_expansion_interface
{
public:
static constexpr feature_type imperfect_features() { return feature::GRAPHICS; }
// construction/destruction
electron_mode7_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
DECLARE_INPUT_CHANGED_MEMBER(break_button);
protected:
// device-level overrides
virtual void device_start() override ATTR_COLD;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
virtual const tiny_rom_entry *device_rom_region() const override ATTR_COLD;
virtual ioport_constructor device_input_ports() const override ATTR_COLD;
virtual uint8_t expbus_r(offs_t offset) override;
virtual void expbus_w(offs_t offset, uint8_t data) override;
private:
required_device<screen_device> m_screen;
required_device<mc6845_device> m_hd6845;
required_device<saa5050_device> m_trom;
required_device<electron_expansion_slot_device> m_exp;
required_memory_region m_exp_rom;
std::unique_ptr<uint8_t[]> m_videoram;
MC6845_UPDATE_ROW(crtc_update_row);
void vsync_changed(int state);
uint8_t m_romsel;
};
// device type definition
DECLARE_DEVICE_TYPE(ELECTRON_MODE7, electron_mode7_device)
#endif // MAME_BUS_ELECTRON_MODE7_H
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