// license:BSD-3-Clause // copyright-holders:Tomasz Slanina #ifndef MAME_MACHINE_SDA2006_H #define MAME_MACHINE_SDA2006_H #pragma once // sda2006_device class sda2006_device : public device_t, public device_nvram_interface { public: // construction/destruction sda2006_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); // I/O operations int read_data(); void write_data(int state); void write_clock(int state); void write_enable(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_READ = 0, EEPROM_WRITE }; uint8_t m_latch; uint8_t m_current_address; uint32_t m_eeprom_state; uint8_t m_read_stream_pos; bool m_is_end_o_stream; uint8_t m_write_stream_length; uint32_t m_write_stream; uint8_t m_write_state; uint8_t m_clock_state; optional_memory_region m_region; uint16_t m_eeprom_data[0x20]; }; // device type definition DECLARE_DEVICE_TYPE(SDA2006, sda2006_device) #endif // MAME_MACHINE_SDA2006_H