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// license:BSD-3-Clause
// copyright-holders:Angelo Salese
#ifndef MAME_MACHINE_M6M80011AP_H
#define MAME_MACHINE_M6M80011AP_H

#pragma once



//**************************************************************************
//  INTERFACE CONFIGURATION MACROS
//**************************************************************************

/* TODO: frequency */
#define MCFG_M6M80011AP_ADD(_tag) \
	MCFG_DEVICE_ADD(_tag, M6M80011AP, XTAL(32'768))

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

// ======================> m6m80011ap_device

class m6m80011ap_device :   public device_t,
							public device_nvram_interface
{
public:
	// construction/destruction
	m6m80011ap_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	// I/O operations
	DECLARE_READ_LINE_MEMBER( read_bit );
	DECLARE_READ_LINE_MEMBER( ready_line );
	DECLARE_WRITE_LINE_MEMBER( set_cs_line );
	DECLARE_WRITE_LINE_MEMBER( set_clock_line );
	DECLARE_WRITE_LINE_MEMBER( write_bit );

protected:
	// device-level overrides
	virtual void device_validity_check(validity_checker &valid) const override;
	virtual void device_start() override;
	virtual void device_reset() override;

	virtual void nvram_default() override;
	virtual void nvram_read(emu_file &file) override;
	virtual void nvram_write(emu_file &file) override;

private:
	enum eeprom_cmd_t
	{
		EEPROM_GET_CMD = 0,
		EEPROM_READ,
		EEPROM_WRITE,
		EEPROM_WRITE_ENABLE,
		EEPROM_WRITE_DISABLE,
		EEPROM_STATUS_OUTPUT
	};

	uint8_t m_latch;
	uint8_t m_reset_line;
	uint8_t m_cmd_stream_pos;
	uint32_t m_current_cmd;
	uint8_t m_read_latch;
	uint8_t m_current_addr;
	uint8_t m_eeprom_we;

	eeprom_cmd_t m_eeprom_state;
	uint16_t m_eeprom_data[0x80];
};


// device type definition
DECLARE_DEVICE_TYPE(M6M80011AP, m6m80011ap_device)

#endif // MAME_MACHINE_M6M80011AP_H