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// license:BSD-3-Clause
// copyright-holders:Angelo Salese
#ifndef MAME_MACHINE_M6M80011AP_H
#define MAME_MACHINE_M6M80011AP_H
#pragma once
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 = 32'768); /* TODO: frequency */
// I/O operations
int read_bit();
int ready_line();
void set_cs_line(int state);
void set_clock_line(int state);
void write_bit(int state);
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 bool nvram_read(util::read_stream &file) override;
virtual bool nvram_write(util::write_stream &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];
};
DECLARE_DEVICE_TYPE(M6M80011AP, m6m80011ap_device)
#endif // MAME_MACHINE_M6M80011AP_H
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