// license:BSD-3-Clause // copyright-holders:hap /*************************************************************************** Alpha Denshi ALPHA-8201 family protection emulation ***************************************************************************/ #ifndef _ALPHA8201_H_ #define _ALPHA8201_H_ #include "emu.h" class alpha_8201_device : public device_t { public: alpha_8201_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); ~alpha_8201_device() {} DECLARE_READ8_MEMBER(mcu_data_r); DECLARE_WRITE8_MEMBER(mcu_data_w); DECLARE_WRITE16_MEMBER(mcu_d_w); // external I/O DECLARE_WRITE_LINE_MEMBER(bus_dir_w); DECLARE_WRITE_LINE_MEMBER(mcu_start_w); DECLARE_READ8_MEMBER(ext_ram_r); DECLARE_WRITE8_MEMBER(ext_ram_w); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual machine_config_constructor device_mconfig_additions() const override; private: // devices/pointers required_device m_mcu; // internal state int m_bus; // shared RAM bus direction uint16_t m_mcu_address; // MCU side RAM address uint16_t m_mcu_d; // MCU D output data uint8_t m_mcu_r[4]; // MCU R0-R3 output data std::unique_ptr m_shared_ram; // 1KB RAM void mcu_update_address(); void mcu_writeram(); }; extern const device_type ALPHA_8201; #endif /* _ALPHA8201_H_ */