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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************

    Cumana 68008 Upgrade Board

    http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Cumana_680082ndProcessor.html

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


#ifndef MAME_BUS_BBC_INTERNAL_CUMANA68K_H
#define MAME_BUS_BBC_INTERNAL_CUMANA68K_H

#include "internal.h"
#include "cpu/m68000/m68000.h"
#include "machine/6821pia.h"
#include "machine/input_merger.h"
#include "machine/mc146818.h"
#include "machine/nscsi_cb.h"
#include "imagedev/floppy.h"
#include "machine/wd_fdc.h"
#include "formats/os9_dsk.h"

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

class bbc_cumana68k_device :
	public device_t,
	public device_bbc_internal_interface
{
public:
	// construction/destruction
	bbc_cumana68k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	void pia_rtc_pb_w(uint8_t data);
	void pia_sasi_pb_w(uint8_t data);

	DECLARE_READ8_MEMBER(mem6502_r);
	DECLARE_WRITE8_MEMBER(mem6502_w);

	DECLARE_FLOPPY_FORMATS(floppy_formats);

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

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

	DECLARE_WRITE_LINE_MEMBER(irq6502_w) override;

private:
	DECLARE_WRITE_LINE_MEMBER(reset68008_w);
	DECLARE_WRITE_LINE_MEMBER(rtc_ce_w);

	required_device<m68000_base_device> m_m68008;
	required_device<pia6821_device> m_pia_sasi;
	required_device<pia6821_device> m_pia_rtc;
	required_device<input_merger_device> m_irqs;
	required_device<mc146818_device> m_rtc;
	required_device<wd2797_device> m_fdc;
	required_device_array<floppy_connector, 4> m_floppy;
	required_device<nscsi_callback_device> m_sasi;

	void cumana68k_mem(address_map &map);

	void fsel_w(offs_t offset, uint8_t data);

	uint8_t sasi_r();
	void sasi_w(uint8_t data);

	int m_masknmi;

	uint8_t rtc_r();
	void rtc_w(uint8_t data);
	void mc146818_set(int as, int ds, int rw);
	uint8_t m_mc146818_data;
	int m_mc146818_as;
	int m_mc146818_ds;
	int m_mc146818_rw;
	int m_mc146818_ce;
};


// device type definition
DECLARE_DEVICE_TYPE(BBC_CUMANA68K, bbc_cumana68k_device)


#endif // MAME_BUS_BBC_INTERNAL_CUMANA68K_H